From 978b25c34d2bfe3a8163b95e481d95379dbe9697 Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Fri, 19 Aug 2022 10:37:03 +0200
Subject: [PATCH 01/20] Started rewrite for using an I2S amplifier with less
 unnecessary features.

---
 include/config.sample.h       |  84 ----
 include/controller.h          |  62 +--
 include/data_sources.h        |  54 ---
 include/esmp3.h               |  11 +
 include/http_client_wrapper.h |  37 --
 include/http_server.h         |  29 --
 include/main.h                |   9 -
 include/player.h              | 104 -----
 include/playlist.h            |  64 +--
 include/playlist_manager.h    |  31 +-
 include/spi_master.h          |  73 +---
 include/updater.h             |  10 -
 platformio.ini                |  22 +-
 src/controller.cpp            | 470 +--------------------
 src/data_sources.cpp          |  57 ---
 src/esmp3.cpp                 |  68 +++
 src/http_client_wrapper.cpp   | 213 ----------
 src/http_server.cpp           | 167 --------
 src/index.html                | 359 ----------------
 src/main.cpp                  | 149 -------
 src/player.cpp                | 753 ----------------------------------
 src/playlist.cpp              | 402 +-----------------
 src/playlist_manager.cpp      | 247 +++--------
 src/spi_master.cpp            |  26 ++
 src/updater.cpp               |  96 -----
 25 files changed, 218 insertions(+), 3379 deletions(-)
 delete mode 100644 include/config.sample.h
 delete mode 100644 include/data_sources.h
 create mode 100644 include/esmp3.h
 delete mode 100644 include/http_client_wrapper.h
 delete mode 100644 include/http_server.h
 delete mode 100644 include/main.h
 delete mode 100644 include/player.h
 delete mode 100644 include/updater.h
 delete mode 100644 src/data_sources.cpp
 create mode 100644 src/esmp3.cpp
 delete mode 100644 src/http_client_wrapper.cpp
 delete mode 100644 src/http_server.cpp
 delete mode 100644 src/index.html
 delete mode 100644 src/main.cpp
 delete mode 100644 src/player.cpp
 create mode 100644 src/spi_master.cpp
 delete mode 100644 src/updater.cpp

diff --git a/include/config.sample.h b/include/config.sample.h
deleted file mode 100644
index 05fe964..0000000
--- a/include/config.sample.h
+++ /dev/null
@@ -1,84 +0,0 @@
-#pragma once
-#include <Arduino.h>
-
-// This is a simple number indicating the version for the HTTP Updater.
-#define OTA_VERSION 1
-// Comment out to prevent automatic updates.
-#define OTA_UPDATE_URL "https://files.schle.nz/esmp3/update.manifest"
-#define OTA_CHECK_INTERVAL 12*60*60*1000 // 12 hours
-
-#define SHOW_DEBUG
-//#define SHOW_TRACE
-#define FTP_DEBUG
-#define DELAY_AFTER_DEBUG_AND_TRACE 0
-
-// Here you can define WiFi data to use. But actually, the better way to do
-// this is by using /_wifi.txt on the sd card.
-//#define WIFI_SSID "---CHANGEME---"
-//#define WIFI_PASS "---CHANGEME---"
-
-#define VS1053_SLEEP_DELAY 5000
-#define POSITION_SEND_INTERVAL 5000
-
-#define DEBOUNCE_MILLIS      200
-#define VOLUME_DEFAULT 230
-#define VOLUME_MIN 190
-#define VOLUME_MAX 255
-#define VOLUME_STEP 0x08
-
-#define RFID_SCAN_INTERVAL 100
-
-#define NUM_BUTTONS 4
-
-#define PIN_SD_CS(x) (digitalWrite(16,  x))
-#define PIN_SD_CS_SETUP() (pinMode(16, OUTPUT))
-
-#define PIN_VS1053_XCS(x) (digitalWrite(4, x))
-#define PIN_VS1053_XCS_SETUP() (pinMode(4, OUTPUT))
-
-#define PIN_VS1053_XRESET(x) (digitalWrite(0, x))
-#define PIN_VS1053_XRESET_SETUP() (pinMode(0, OUTPUT))
-
-#define PIN_VS1053_XDCS(x) (digitalWrite(2, x))
-#define PIN_VS1053_XDCS_SETUP() (pinMode(2, OUTPUT))
-
-#define PIN_VS1053_DREQ() (digitalRead(15))
-#define PIN_VS1053_DREQ_SETUP() (pinMode(15, INPUT))
-
-#define PIN_RC522_CS(x) (digitalWrite(17, x))
-#define PIN_RC522_CS_SETUP() (pinMode(17, OUTPUT))
-
-#define PIN_SPEAKER_L(x) (digitalWrite(27, x))
-#define PIN_SPEAKER_L_SETUP() (pinMode(27, OUTPUT))
-
-#define PIN_SPEAKER_R(x) (digitalWrite(26, x))
-#define PIN_SPEAKER_R_SETUP() (pinMode(26, OUTPUT))
-
-#define BTN_PREV() ( ! digitalRead(22))
-#define BTN_PREV_SETUP() (pinMode(22, INPUT_PULLUP))
-
-#define BTN_VOL_UP() ( ! digitalRead(21))
-#define BTN_VOL_UP_SETUP() (pinMode(21, INPUT_PULLUP))
-
-#define BTN_VOL_DOWN() ( ! digitalRead(32))
-#define BTN_VOL_DOWN_SETUP() (pinMode(32, INPUT_PULLUP))
-
-#define BTN_NEXT() ( ! digitalRead(33))
-#define BTN_NEXT_SETUP() (pinMode(33, INPUT_PULLUP))
-
-
-// Other definitions
-#define INFO(x, ...) Serial.printf(x, ##__VA_ARGS__)
-#define ERROR(x, ...) Serial.printf(x, ##__VA_ARGS__)
-
-#ifdef SHOW_DEBUG
-	#define DEBUG(x, ...) {Serial.printf(x, ##__VA_ARGS__); delay(DELAY_AFTER_DEBUG_AND_TRACE);}
-#else
-	#define DEBUG(x, ...) while(0) {}
-#endif
-
-#ifdef SHOW_TRACE
-	#define TRACE(x, ...) {Serial.printf(x, ##__VA_ARGS__); delay(DELAY_AFTER_DEBUG_AND_TRACE);}
-#else
-	#define TRACE(x, ...) while(0) {}
-#endif
diff --git a/include/controller.h b/include/controller.h
index 3989caf..7b56efe 100644
--- a/include/controller.h
+++ b/include/controller.h
@@ -1,61 +1,13 @@
 #pragma once
 
 #include <Arduino.h>
-#include <ESPAsyncWebServer.h>
-#include "config.h"
-
-class Controller;
-
-#include "player.h"
-#include "playlist.h"
-#include "playlist_manager.h"
-#include "http_server.h"
-
-#undef DEPRECATED
-#include <MFRC522.h>
-
-enum ControllerState { NORMAL, LOCKING, LOCKED };
 
 class Controller {
-private:
-	MFRC522* _rfid;
-	HTTPServer* _http_server;
-	ControllerState _state = NORMAL;
-	bool _rfid_enabled = true;
-	void _check_rfid();
-	void _check_serial();
-	void _check_buttons();
-	bool _debounce_button(uint8_t index);
-	uint32_t _get_rfid_card_uid();
-	String _read_rfid_data();
-	bool _rfid_present = false;
-	String _last_rfid_uid = "";
-	String _last_rfid_data = "";
+	private:
+	void handle_buttons();
+	void handle_rfid();
+
+	public:
+	void handle();
 	
-	unsigned long _last_rfid_scan_at = 0;
-	unsigned long _last_position_info_at = 0;
-	unsigned long _last_update_check_at = 0;
-	unsigned long _last_wifi_try_at = 0;
-	String _serial_buffer = String();
-	String _cmd_queue = "";
-	void _execute_command_ls(String path);
-	void _execute_command_ids();
-	void _execute_command_help();
-	unsigned long _button_last_pressed_at[NUM_BUTTONS];
-	bool _check_button(uint8_t btn);
-public:
-	Controller(Player* p, PlaylistManager* pm);
-	PlaylistManager* pm;
-	Player* player;
-	void register_http_server(HTTPServer* h);
-	void loop();
-	void send_controller_status();
-	void send_player_status();
-	void send_playlist_manager_status();
-	void send_position();
-	void inform_new_client(AsyncWebSocketClient* client);
-	String json();
-	bool process_message(String m);
-	void queue_command(String cmd);
-	void update_playlist_manager();
-};
+};
\ No newline at end of file
diff --git a/include/data_sources.h b/include/data_sources.h
deleted file mode 100644
index d65e591..0000000
--- a/include/data_sources.h
+++ /dev/null
@@ -1,54 +0,0 @@
-#pragma once
-
-#include <Arduino.h>
-#include <SD.h>
-#include "config.h"
-#include "http_client_wrapper.h"
-
-class DataSource {
-private:
-public:
-	DataSource() {};
-	virtual ~DataSource() {};
-	virtual size_t read(uint8_t* buf, size_t len) = 0;
-	virtual int read() = 0;
-	virtual size_t position() = 0;
-	virtual void seek(size_t position) = 0;
-	virtual size_t size() = 0;
-	virtual void close() = 0;
-	virtual void skip_id3_tag() {};
-	virtual bool usable() = 0;
-};
-
-class SDDataSource : public DataSource {
-private:
-	File _file;
-public:
-	SDDataSource(String file);
-	~SDDataSource();
-	size_t read(uint8_t* buf, size_t len);
-	int read();
-	size_t position();
-	void seek(size_t position);
-	size_t size();
-	void close();
-	void skip_id3_tag();
-	bool usable();
-};
-
-class HTTPSDataSource : public DataSource {
-private:
-	WiFiClient* _stream = NULL;
-	HTTPClientWrapper* _http = NULL;
-	uint32_t _position;
-public:
-	HTTPSDataSource(String url, uint32_t offset=0);
-	~HTTPSDataSource();
-	size_t read(uint8_t* buf, size_t len);
-	int read();
-	size_t position();
-	void seek(size_t position);
-	size_t size();
-	void close();
-	bool usable();
-};
diff --git a/include/esmp3.h b/include/esmp3.h
new file mode 100644
index 0000000..d17af5d
--- /dev/null
+++ b/include/esmp3.h
@@ -0,0 +1,11 @@
+#pragma once
+#include "controller.h"
+
+#define PIN_CS_SD     16
+#define PIN_CS_RFID   17
+
+#define I2S_DOUT      25
+#define I2S_BCLK      27
+#define I2S_LRC       26
+
+extern Controller controller;
\ No newline at end of file
diff --git a/include/http_client_wrapper.h b/include/http_client_wrapper.h
deleted file mode 100644
index a80e15f..0000000
--- a/include/http_client_wrapper.h
+++ /dev/null
@@ -1,37 +0,0 @@
-#pragma once
-
-#include <HTTPClient.h>
-#include "config.h"
-
-class HTTPClientWrapper {
-private:
-	HTTPClient* _http;
-	uint8_t* _buffer;
-	uint16_t _buffer_size;
-	uint16_t _buffer_length;
-	uint16_t _buffer_position;
-	uint32_t _chunk_length;
-	
-	bool _connected = false;
-	String _content_type;
-	uint32_t _length;
-	bool _request(String method, String url, uint32_t offset=0, uint8_t redirection_count=0);
-	WiFiClient* _stream;
-	bool _is_chunked;
-	void _read_next_chunk_header(bool first);
-	uint16_t _fill_buffer();
-	
-public:
-	HTTPClientWrapper();
-	~HTTPClientWrapper();
-	bool get(String url, uint32_t offset=0, uint8_t redirection_count=0);
-	bool head(String url, uint32_t offset=0, uint8_t redirection_count=0);
-	String getContentType();
-	String getString();
-	int read();
-	uint32_t read(uint8_t* dst, uint32_t len);
-	void close();
-	uint32_t getSize();
-	String readUntil(String sep);
-	String readLine();
-};
diff --git a/include/http_server.h b/include/http_server.h
deleted file mode 100644
index b190e1c..0000000
--- a/include/http_server.h
+++ /dev/null
@@ -1,29 +0,0 @@
-#pragma once
-
-class HTTPServer;
-
-#include "player.h"
-#include "controller.h"
-#include <AsyncTCP.h>
-#include <ESPAsyncWebServer.h>
-
-class HTTPServer {
-private:
-	AsyncWebServer* _server;
-	
-	Player* _player;
-	Controller* _controller;
-	void _handle_upload(AsyncWebServerRequest* request, String filename, size_t index, uint8_t* data, size_t len, bool final);
-	uint16_t _chunk_length;
-	uint8_t* _chunk;
-	File _upload_file;
-	uint32_t _file_size;
-	uint32_t _file_size_done;
-	bool _need_header;
-	uint32_t _upload_position;
-	void _onEvent(AsyncWebSocket * server, AsyncWebSocketClient * client, AwsEventType type, void * arg, uint8_t *data, size_t len);
-	void _handle_index(AsyncWebServerRequest* req);
-public:
-	HTTPServer(Player* p, Controller* c);
-	AsyncWebSocket* ws;
-};
diff --git a/include/main.h b/include/main.h
deleted file mode 100644
index be0496e..0000000
--- a/include/main.h
+++ /dev/null
@@ -1,9 +0,0 @@
-#pragma once
-#include <Preferences.h>
-
-void wifi_connect();
-
-extern const uint8_t file_index_html_start[] asm("_binary_src_index_html_start");
-extern bool debug_enabled;
-extern bool trace_enabled;
-extern Preferences prefs;
\ No newline at end of file
diff --git a/include/player.h b/include/player.h
deleted file mode 100644
index 522ee20..0000000
--- a/include/player.h
+++ /dev/null
@@ -1,104 +0,0 @@
-#pragma once
-#include "config.h"
-#include <SPI.h>
-#include <SD.h>
-#include "spi_master.h"
-#include "playlist.h"
-#include "data_sources.h"
-
-class Player;
-
-#include "controller.h"
-
-#define SCI_MODE 0x00
-#define SCI_STATUS 0x01
-#define SCI_BASS 0x02
-#define SCI_CLOCKF 0x03
-#define SCI_DECODE_TIME 0x04
-#define SCI_AUDATA 0x05
-#define SCI_VOL 0x0B
-#define SCI_WRAMADDR 0x07
-#define SCI_WRAM 0x06
-#define SCI_HDAT0 0x08
-#define SCI_HDAT1 0x09
-#define SCI_AIADDR 0x0A
-#define SCI_AICTRL0 0x0C
-#define SCI_AICTRL1 0x0D
-#define SCI_AICTRL2 0x0E
-#define SCI_AICTRL3 0x0F
-
-#define CMD_WRITE 0x02
-#define CMD_READ 0x03
-
-#define ADDR_ENDBYTE 0x1E06
-
-#define SM_LAYER12 0x0001
-#define SM_RESET 0x0004
-#define SM_CANCEL 0x0008
-#define SM_SDINEW 0x0800
-#define SM_ADPCM 0x1000
-#define SS_DO_NOT_JUMP 0x8000
-
-class Player {
-private:
-	enum state { uninitialized, idle, playing, stopping,
-		sleeping, recording };
-	void _reset();
-	void _wait();
-	uint16_t _read_control_register(uint8_t address, bool do_wait=true);
-	void _write_control_register(uint8_t address, uint16_t value, bool do_wait=true);
-	void _write_direct(uint8_t address, uint16_t value);
-	void _write_data(uint8_t* data);
-	uint16_t _read_wram(uint16_t address);
-	state _state = state::uninitialized;
-	void _refill();
-	bool _refill_needed();
-	void _flush_and_cancel();
-	int8_t _get_endbyte();
-	void _flush(uint count, int8_t fill_byte);
-	void _play_file(String filename, uint32_t offset);
-	void _finish_playing();
-	void _finish_stopping(bool turn_speaker_off);
-	void _mute();
-	void _unmute();
-	void _sleep();
-	void _wakeup();
-	void _record();
-	void _patch_adpcm();
-	void _speaker_off();
-	void _speaker_on();
-
-	SPISettings _spi_settings_slow = SPISettings(250000, MSBFIRST, SPI_MODE0);
-	SPISettings _spi_settings_fast = SPISettings(4000000, MSBFIRST, SPI_MODE0);
-	SPISettings* _spi_settings = &_spi_settings_slow;
-
-	DataSource* _file;
-	uint32_t _file_size = 0;
-	uint8_t _buffer[32];
-	uint32_t _current_play_position = 0;
-	Playlist* _current_playlist = NULL;
-	uint _refills;
-	uint8_t _volume;
-	uint16_t _stop_delay;
-	uint32_t _skip_to;
-	SPIMaster* _spi;
-	Controller* _controller;
-	unsigned long _stopped_at;
-public:
-	Player(SPIMaster* s);
-	void init();
-	void register_controller(Controller* c);
-	void vol_up();
-	void vol_down();
-	void track_next();
-	void track_prev();
-	void set_track(uint8_t track);
-	bool is_playing();
-	bool play();
-	bool play(Playlist* p);
-	void stop(bool turn_speaker_off=true);
-	bool loop();
-	void set_volume(uint8_t vol, bool save = true);
-	String position_json();
-	String json();
-};
diff --git a/include/playlist.h b/include/playlist.h
index 38e1f97..73691e3 100644
--- a/include/playlist.h
+++ b/include/playlist.h
@@ -1,59 +1,15 @@
 #pragma once
-#include <Arduino.h>
+
 #include <vector>
-#include <ArduinoJson.h>
-#include "http_client_wrapper.h"
-
-enum PlaylistPersistence {
-	PERSIST_NONE,
-	PERSIST_TEMPORARY,
-	PERSIST_PERMANENTLY
-};
-
-struct PlaylistEntry {
-	String filename;
-	String title;
-	String id;
-	
-	bool operator<(PlaylistEntry p) { return title < p.title; }
-};
+#include <Arduino.h>
 
 class Playlist {
-private:
-	uint32_t _position = 0;
-	uint32_t _current_track = 0;
-	bool _started = false;
-	bool _shuffled = false;
-	std::vector<PlaylistEntry> _files;
-	String _title = "";
-	String _path;
-	void _add_path(String path);
-	void _examine_http_url(String url);
-	void _parse_rss(HTTPClientWrapper* http);
-	void _parse_m3u(HTTPClientWrapper* http);
-	void _parse_pls(HTTPClientWrapper* http);
-public:
-	PlaylistPersistence persistence = PERSIST_TEMPORARY;
-	Playlist(String path);
-	void start();
-	uint16_t get_file_count();
-	bool has_track_next();
-	bool has_track_prev();
-	bool track_next();
-	bool track_prev();
-	void track_restart();
-	bool set_track(uint8_t track);
-	void set_track_by_id(String id);
-	void reset();
-	String path();
-	bool is_empty();
-	bool get_current_file(String* dst);
-	String get_current_track_id();
-	uint32_t get_position();
-	void set_position(uint32_t p);
-	void shuffle(uint8_t random_offset=0);
-	void advent_shuffle(uint8_t day);
-	bool is_fresh();
-	void dump();
-	void json(JsonObject json);
+	private:
+	std::vector<String> files;
+	uint8_t current_file = 0;
+	uint16_t current_time = 0;
+
+	public:
+	void add_file(String filename);
+	void sort();
 };
diff --git a/include/playlist_manager.h b/include/playlist_manager.h
index 42c88a0..551c40a 100644
--- a/include/playlist_manager.h
+++ b/include/playlist_manager.h
@@ -1,24 +1,21 @@
 #pragma once
 
-#include <map>
 #include <vector>
+#include <map>
+#include <Arduino.h>
 #include "playlist.h"
 
 class PlaylistManager {
-private:
-	std::map<String, String> _map;
-	std::map<String, Playlist*> _playlists;
-	std::vector<String> _unmapped_folders;
-	void _check_for_special_chars(String s);
-	void _save_mapping();
-public:
+	private:
+	Playlist get_playlist_for_tag_id(String id);
+	String current_rfid_tag_id;
+	uint32_t audio_current_time = 0;
+
+	public:
 	PlaylistManager();
-	Playlist* get_playlist_for_id(String id);
-	Playlist* get_playlist_for_folder(String folder);
-	void dump_ids();
-	void scan_files();
-	String json();
-	bool add_mapping(String id, String folder);
-	String create_mapping_txt();
-	void persist(Playlist* p);
-};
+	std::vector<String> dirs;
+	std::map<String, String> map;
+	Playlist get_playlist(String rfid_id);
+	Playlist current_playlist;
+	void set_audio_current_time(uint32_t time);
+};
\ No newline at end of file
diff --git a/include/spi_master.h b/include/spi_master.h
index ee5724c..a32914d 100644
--- a/include/spi_master.h
+++ b/include/spi_master.h
@@ -1,70 +1,9 @@
 #pragma once
 
-#include <Arduino.h>
-#include <SPI.h>
-#include "config.h"
-
 class SPIMaster {
-public:
-	static uint8_t state;
-
-	static void init() {
-		PIN_SD_CS_SETUP();
-		PIN_VS1053_XCS_SETUP();
-		PIN_VS1053_XDCS_SETUP();
-		PIN_RC522_CS_SETUP();
-		disable();
-	}
-
-	static void select_sd(bool enabled=true) {
-		PIN_SD_CS(enabled ? LOW : HIGH);
-		if (enabled) {
-			state |= 1;
-		} else {
-			state &= ~1;
-		}
-	}
-
-	static void select_vs1053_xcs(bool enabled=true) {
-		PIN_VS1053_XCS(enabled ? LOW : HIGH);
-		if (enabled) {
-			state |= 2;
-		} else {
-			state &= ~2;
-		}
-	}
-
-	static void select_vs1053_xdcs(bool enabled=true) {
-		PIN_VS1053_XDCS(enabled ? LOW : HIGH);
-		if (enabled) {
-			state |= 4;
-		} else {
-			state &= ~4;
-		}
-	}
-
-	static void select_rc522(bool enabled=true) {
-		PIN_RC522_CS(enabled ? LOW : HIGH);
-		if (enabled) {
-			state |= 8;
-		} else {
-			state &= ~8;
-		}
-	}
-
-	static void set_state(uint8_t s) {
-		disable();
-		if (s & 1) select_sd();
-		if (s & 2) select_vs1053_xcs();
-		if (s & 4) select_vs1053_xdcs();
-		if (s & 8) select_rc522();
-	}
-
-	static void disable() {
-		PIN_SD_CS(HIGH);
-		PIN_VS1053_XCS(HIGH);
-		PIN_VS1053_XDCS(HIGH);
-		PIN_RC522_CS(HIGH);
-		state = 0;
-	}
-};
\ No newline at end of file
+	public:
+	static void enable_sd();
+	static void enable_rfid();
+	static void disable_all();
+	static void initialize();
+};
diff --git a/include/updater.h b/include/updater.h
deleted file mode 100644
index 9d5a3a8..0000000
--- a/include/updater.h
+++ /dev/null
@@ -1,10 +0,0 @@
-#pragma once
-
-#include "http_client_wrapper.h"
-
-class Updater {
-public:
-	static void run();
-	static bool do_update(int cmd, String url, String expected_md5);
-	static bool read_line(String* dst, HTTPClientWrapper* http, String expected_key);
-};
diff --git a/platformio.ini b/platformio.ini
index c93214b..64fddb3 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -12,29 +12,27 @@
 default_envs = esp32
 
 [extra]
-lib_deps =
-	63 @ 1.4.5 ; MFRC522
-	https://github.com/me-no-dev/ESPAsyncWebServer.git
-	ArduinoJSON
-	6691 ; TinyXML
+lib_deps = 
 
 [env:esp32]
 platform = espressif32
 board = esp-wrover-kit
 framework = arduino
 upload_speed = 115200
-build_flags=!./build_version.sh
-lib_deps = ${extra.lib_deps}
-;upload_port = 10.10.2.108 ; /dev/cu.SLAB_USBtoUART
+build_flags = !./build_version.sh
+lib_deps = 
+	${extra.lib_deps}
+	esphome/ESP32-audioI2S@^2.1.0
+upload_port = 10.10.2.108
 monitor_speed = 115200
-board_build.embed_txtfiles = src/index.html
-;board_build.partitions = partitions.csv
-;monitor_port = /dev/cu.wchusbserial1420
+monitor_port = /dev/cu.usbserial-0001
 
 [env:deploy]
 platform = espressif32
 board = esp-wrover-kit
 framework = arduino
-lib_deps = ${extra.lib_deps}
+lib_deps = 
+	${extra.lib_deps}
+	esphome/ESP32-audioI2S@^2.1.0
 board_build.embed_txtfiles = src/index.html
 board_build.partitions = partitions.csv
diff --git a/src/controller.cpp b/src/controller.cpp
index f5cc26a..f2e476d 100644
--- a/src/controller.cpp
+++ b/src/controller.cpp
@@ -1,463 +1,13 @@
 #include "controller.h"
-#include "main.h"
-#include "spi_master.h"
-#include "config.h"
-#include "playlist.h"
-#include "http_server.h"
-#include "updater.h"
-#include <ArduinoJson.h>
 
-Controller::Controller(Player* p, PlaylistManager* playlist_manager) {
-	player = p;
-	pm = playlist_manager;
-	_rfid = new MFRC522(17, MFRC522::UNUSED_PIN);
+void Controller::handle() {
+
+}
+
+void Controller::handle_buttons() {
+
+}
+
+void Controller::handle_rfid() {
 	
-	player->register_controller(this);
-
-	BTN_NEXT_SETUP();
-	BTN_PREV_SETUP();
-	BTN_VOL_UP_SETUP();
-	BTN_VOL_DOWN_SETUP();
-
-	SPIMaster::select_rc522();
-	DEBUG("Initializing RC522...\n");
-	_rfid->PCD_Init();
-	#ifdef SHOW_DEBUG
-		_rfid->PCD_DumpVersionToSerial();
-	#endif
-	SPIMaster::select_rc522(false);
-	INFO("RC522 initialized.\n");
-
-	for (uint8_t i=0; i<NUM_BUTTONS; i++) _button_last_pressed_at[i]=0;
-}
-
-void Controller::register_http_server(HTTPServer* h) {
-	_http_server = h;
-}
-
-void Controller::loop() {
-	unsigned long now = millis();
-	if ((_last_rfid_scan_at < now - RFID_SCAN_INTERVAL) || (now < _last_rfid_scan_at)) {
-		_check_rfid();
-		_last_rfid_scan_at = now;
-	}
-	if ((_last_position_info_at < now - POSITION_SEND_INTERVAL) || (now < _last_position_info_at)) {
-		send_position();
-		_last_position_info_at = now;
-	}
-	_check_serial();
-	_check_buttons();
-	if (_cmd_queue.length() > 0) {
-		process_message(_cmd_queue);
-		_cmd_queue = "";
-	}
-	
-	#ifdef OTA_UPDATE_URL
-	if (!player->is_playing() && _last_update_check_at < now && _last_update_check_at + OTA_CHECK_INTERVAL < now) {
-		Updater::run();
-	} else {
-		_last_update_check_at = now;
-	}
-	#endif
-	
-	if (!player->is_playing() && !WiFi.isConnected() && _last_wifi_try_at < now && _last_wifi_try_at + 5*60*1000 < now) {
-		wifi_connect();
-	} else {
-		_last_wifi_try_at = now;
-	}
-}
-
-uint32_t Controller::_get_rfid_card_uid() {
-	SPIMaster::select_rc522();
-	if (!_rfid->PICC_ReadCardSerial()) {
-		if (!_rfid->PICC_IsNewCardPresent()) {
-			return 0;
-		}
-		if (!_rfid->PICC_ReadCardSerial()) {
-			return 0;
-		}
-	}
-	SPIMaster::select_rc522(false);
-	uint32_t uid = _rfid->uid.uidByte[0]<<24 | _rfid->uid.uidByte[1]<<16 | _rfid->uid.uidByte[2]<<8 | _rfid->uid.uidByte[3];
-	return uid;
-}
-
-void Controller::_check_rfid() {
-	//TRACE("check_rfid running...\n");
-	MFRC522::StatusCode status;
-	if (_rfid_present) {
-		byte buffer[2];
-		byte buffer_size = 2;
-		SPIMaster::select_rc522();
-		status = _rfid->PICC_WakeupA(buffer, &buffer_size);
-		if (status == MFRC522::STATUS_OK) {
-			// Card is still present.
-			_rfid->PICC_HaltA();
-			SPIMaster::select_rc522(false);
-			return;
-		}
-		SPIMaster::select_rc522(false);
-		// Card is now gone
-		_rfid_present = false;
-		INFO("No more RFID card.\n");
-		if (_state != LOCKED) {
-			player->stop();
-		}
-		send_controller_status();
-	} else {
-		uint32_t uid = _get_rfid_card_uid();
-		if (uid > 0) {
-			String temp = String(uid, HEX);
-			String s_uid = "";
-			for (int i=0; i<(8-temp.length()); i++) {
-				s_uid.concat("0");
-			}
-			s_uid.concat(temp);
-			INFO("New RFID card uid: %s\n", s_uid.c_str());
-			_last_rfid_uid = s_uid;
-			_rfid_present = true;
-			
-			String data = _read_rfid_data();
-			_last_rfid_data = data;
-
-			Playlist* pl = pm->get_playlist_for_id(s_uid);
-			if (data.indexOf("[lock]") != -1) {
-				if (_state == LOCKED) {
-					_state = NORMAL;
-					DEBUG("ControllerState is now UNLOCKED\n");
-				} else {
-					DEBUG("ControllerState is now LOCKING\n");
-					_state = LOCKING;
-				}
-			}
-			if (pl==NULL) {
-				INFO("Could not find album for id '%s'.\n", s_uid.c_str());
-				send_controller_status();
-				return;
-			}
-			int index;
-			if (data.indexOf("[advent]") != -1 && pl->is_fresh()) {
-				struct tm time;
-				getLocalTime(&time);
-				if (time.tm_mon == 11) { // tm_mon is "months since january", so 11 means december.
-					pl->advent_shuffle(time.tm_mday);
-				} else {
-					DEBUG("Album is in advent mode, but it isn't december (yet). Not playing.\n");
-					return;
-				}
-			} else if (data.indexOf("[random]") != -1 && pl->is_fresh()) {
-				pl->shuffle();
-			} else if ((index=data.indexOf("[random:")) != -1 && pl->is_fresh()) {
-				String temp = data.substring(index + 8);
-				index = temp.indexOf("]");
-				TRACE("temp: %s, temp.substring(0, %d): %s\n", temp.c_str(), index, temp.substring(0, index).c_str());
-				if (index>0) {
-					uint8_t random_offset = temp.substring(0, index).toInt();
-					pl->shuffle(random_offset);
-				}
-			}
-			
-			if (_state == LOCKED) {
-				DEBUG("ControllerState is LOCKED, ignoring card.\n");
-				return;
-			}
-			
-			if (_state == LOCKING) {
-				_state = LOCKED;
-				DEBUG("ControllerState is now LOCKED.\n");
-			}
-			
-			player->play(pl);
-			//send_playlist_manager_status();
-			send_controller_status();
-		}
-	}
-}
-
-String Controller::_read_rfid_data() {
-	TRACE("_read_rfid_data() running...\n");
-	static MFRC522::MIFARE_Key keys[8] = {
-		{{0xd3, 0xf7, 0xd3, 0xf7, 0xd3, 0xf7}}, // D3 F7 D3 F7 D3 F7
-		{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}}, // FF FF FF FF FF FF = factory default
-		{{0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5}}, // A0 A1 A2 A3 A4 A5
-		{{0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5}}, // B0 B1 B2 B3 B4 B5
-		{{0x4d, 0x3a, 0x99, 0xc3, 0x51, 0xdd}}, // 4D 3A 99 C3 51 DD
-		{{0x1a, 0x98, 0x2c, 0x7e, 0x45, 0x9a}}, // 1A 98 2C 7E 45 9A
-		{{0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff}}, // AA BB CC DD EE FF
-		{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00}}  // 00 00 00 00 00 00
-	};
-	SPIMaster::select_rc522();
-	DEBUG("Trying to read RFID data...\n");
-	
-	String data = "";
-	MFRC522::PICC_Type type = _rfid->PICC_GetType(_rfid->uid.sak);
-	
-	uint8_t sectors = 0;
-	switch(type) {
-		case MFRC522::PICC_TYPE_MIFARE_MINI: sectors = 5; break;
-		case MFRC522::PICC_TYPE_MIFARE_1K: sectors = 16; break;
-		case MFRC522::PICC_TYPE_MIFARE_4K: sectors = 40; break;
-		default: INFO("Unknown PICC type %s\n", String(MFRC522::PICC_GetTypeName(type)).c_str());
-	}
-	sectors = 2; // Pretend we have only two sectors, so we read only sector #1.
-	int good_key_index = -1;
-	for (uint8_t sector=1; sector<sectors; sector++) {
-		uint8_t blocks = (sector < 32) ? 4 : 16;
-		uint8_t block_offset = (sector < 32) ? sector * 4 : 128 + (sector - 32) * 16;
-		
-		MFRC522::StatusCode status;
-
-		for (int i=0; i<8; i++) {
-			MFRC522::MIFARE_Key *k = &keys[i];
-			TRACE("Trying MIFARE key %02X %02X %02X %02X %02X %02X...\n", k->keyByte[0], k->keyByte[1], k->keyByte[2], k->keyByte[3], k->keyByte[4], k->keyByte[5]);
-			status = _rfid->PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, block_offset, k, &_rfid->uid);
-			if (status == MFRC522::STATUS_OK) {
-				TRACE("Authentication succeeded with key #%d\n", i);
-				good_key_index = i;
-				break;
-			}
-		}
-		if (good_key_index == -1) {
-			TRACE("Could not find a valid MIFARE key.\n");
-		} else {		
-			for (uint8_t block=0; block<blocks-1; block++) {
-				byte buffer[18];
-				uint8_t byte_count = 18;
-				status = _rfid->MIFARE_Read(block_offset + block, buffer, &byte_count);
-				if (status != MFRC522::STATUS_OK) {
-					DEBUG("MIFARE_Read() failed: %s\n", String(_rfid->GetStatusCodeName(status)).c_str());
-					continue;
-				}
-				for (int i=0; i<16; i++) {
-					if (buffer[i]>=0x20 && buffer[i]<0x7F) data.concat((char)buffer[i]);
-				}
-			}
-		}
-	}
-	
-	_rfid->PICC_HaltA();
-	_rfid->PCD_StopCrypto1();
-	DEBUG("Data from RFID: %s\n", data.c_str());
-	SPIMaster::select_rc522(false);
-	return data;
-}
-
-void Controller::_check_serial() {
-	if (Serial.available() > 0) {
-		char c = Serial.read();
-		Serial.printf("%c", c);
-		if (c==10 || c==13) {
-			if (_serial_buffer.length()>0) {
-				process_message(_serial_buffer);
-				_serial_buffer = String();
-			}
-		} else {
-			_serial_buffer.concat(c);
-		}
-	}
-}
-
-bool Controller::process_message(String cmd) {
-	DEBUG("Executing command: %s\n", cmd.c_str());
-
-	if (cmd.startsWith("play ")) {
-		Playlist* p = pm->get_playlist_for_folder(cmd.substring(5));
-		player->play(p);
-	} else if (cmd.equals("play")) {
-		player->play();
-	} else if (cmd.equals("stop")) {
-		player->stop();
-	} else if (cmd.equals("help")) {
-		_execute_command_help();
-	} else if (cmd.equals("-")) {
-		player->vol_down();
-	} else if (cmd.equals("+")) {
-		player->vol_up();
-	} else if (cmd.startsWith("volume=")) {
-		uint8_t vol = cmd.substring(7).toInt();
-		player->set_volume(vol);
-	} else if (cmd.equals("track_prev")) {
-		player->track_prev();
-	} else if (cmd.equals("track_next")) {
-		player->track_next();
-	} else if (cmd.startsWith("track=")) {
-		uint8_t track = cmd.substring(6).toInt();
-		player->set_track(track);
-	} else if (cmd.equals("ids")) {
-		pm->dump_ids();
-	} else if (cmd.equals("reset_vs1053")) {
-		player->stop();
-		player->init();
-	} else if (cmd.equals("reboot")) {
-		ESP.restart();
-	} else if (cmd.startsWith("add_mapping=")) {
-		String rest = cmd.substring(12);
-		uint8_t idx = rest.indexOf('=');
-		String id = rest.substring(0, idx);
-		String folder = rest.substring(idx + 1);
-		pm->add_mapping(id, folder);
-		send_playlist_manager_status();
-	#ifdef OTA_UPDATE_URL
-	} else if (cmd.equals("update")) {
-		Updater::run();
-	#endif
-	} else if (cmd.startsWith("trace=")) {
-		int val = cmd.substring(6).toInt();
-		if (val==0) {
-			trace_enabled = false;
-			prefs.putBool("trace_enabled", false);
-		} else if (val==1) {
-			trace_enabled = true;
-			prefs.putBool("trace_enabled", true);
-		}
-	} else if (cmd.startsWith("debug=")) {
-		int val = cmd.substring(6).toInt();
-		if (val==0) {
-			debug_enabled = false;
-			prefs.putBool("debug_enabled", false);
-		} else if (val==1) {
-			debug_enabled = true;
-			prefs.putBool("debug_enabled", true);
-		}
-	} else {
-		ERROR("Unknown command: %s\n", cmd.c_str());
-		return false;
-	}
-	return true;
-}
-
-void Controller::_execute_command_ls(String path) {
-	INFO("Listing contents of %s:\n", path.c_str());
-	// TODO
-	//std::list<String> files = player->ls(path);
-	//for(std::list<String>::iterator it=files.begin(); it!=files.end(); ++it) {
-	//	INFO("  %s\n", (*it).c_str());
-	//}
-}
-
-void Controller::_execute_command_help() {
-	INFO("Valid commands are:");
-	INFO("  help      - Displays this help\n");
-	//INFO("  ls [dir]  - Lists the contents of [dir] or, if not given, of /\n");
-	INFO("  ids       - Lists all known ID-to-folder mappings\n");
-	INFO("  play [id] - Plays the album with the given id\n");
-	INFO("  stop      - Stops playback\n");
-	INFO("  - / +     - Decrease or increase the volume\n");
-	INFO("  p / n     - Previous or next track\n");
-}
-
-void Controller::_check_buttons() {
-	if (BTN_PREV() && _debounce_button(0)) {
-		if (_state == NORMAL) {
-			player->track_prev();
-		} else {
-			DEBUG("Ignoring btn_prev because state is LOCKED.\n");
-		}
-	} else if (BTN_VOL_UP() && _debounce_button(1)) {
-		player->vol_up();
-	} else if (BTN_VOL_DOWN() && _debounce_button(2)) {
-		player->vol_down();
-	} else if (BTN_NEXT() && _debounce_button(3)) {
-		if (_state == NORMAL) {
-			player->track_next();
-		} else {
-			DEBUG("Ignoring btn_next because state is LOCKED.\n");
-		}
-	}
-}
-
-bool Controller::_debounce_button(uint8_t index) {
-	bool ret = false;
-	if (_button_last_pressed_at[index] + DEBOUNCE_MILLIS < millis()) {
-		DEBUG("Button %d pressed.\n", index);
-		ret = true;
-	}
-	_button_last_pressed_at[index] = millis();
-	return ret;
-}
-
-String Controller::json() {
-	DynamicJsonDocument json(1024);
-	json["_type"] = "controller";
-	switch(_state) {
-		case LOCKED: json["state"] = "locked"; break;
-		case LOCKING: json["state"] = "locking"; break;
-		case NORMAL: json["state"] = "normal"; break;
-	}
-	json["is_rfid_present"] = _rfid_present;
-	JsonObject rfid = json.createNestedObject("last_rfid");
-	rfid["uid"] = _last_rfid_uid;
-	rfid["data"] = _last_rfid_data;
-	json["uptime"] = millis() / 1000;
-	json["free_heap"] = ESP.getFreeHeap();
-	JsonObject versions = json.createNestedObject("versions");
-	versions["ota"] = OTA_VERSION;
-	#ifdef VERSION
-	versions["release"] = VERSION;
-	#else
-	versions["release"] = "unknown";
-	#endif
-	
-	JsonObject wifi = json.createNestedObject("wifi");
-	if (WiFi.isConnected()) {
-		wifi["connected"] = true;
-		wifi["ssid"] = WiFi.SSID();
-		wifi["rssi"] = WiFi.RSSI();
-	} else {
-		wifi["connected"] = false;
-	}
-	return json.as<String>();
-}
-
-void Controller::send_player_status() {
-	TRACE("In send_player_status()...\n");
-
-	if (_http_server->ws->count() > 0) {
-		_http_server->ws->textAll(player->json());
-		_http_server->ws->textAll(player->position_json());
-	}
-}
-
-void Controller::send_playlist_manager_status() {
-	TRACE("In send_playlist_manager_status()...\n");
-	if (_http_server->ws->count() > 0) {
-		_http_server->ws->textAll(pm->json());
-	}
-}
-
-void Controller::send_position() {
-	TRACE("In send_position()...\n");
-	if (_http_server->ws->count() > 0) {
-		_http_server->ws->textAll(player->position_json());
-	}
-	_last_position_info_at = millis();
-}
-
-void Controller::send_controller_status() {
-	TRACE("In send_controller_status()...\n");
-	if (_http_server->ws->count() > 0) {
-		_http_server->ws->textAll(json());
-	}
-}
-
-void Controller::inform_new_client(AsyncWebSocketClient* client) {
-	String s;
-	s += pm->json();
-	s += '\n';
-	s += player->json();
-	s += '\n';
-	s += player->position_json();
-	s += '\n';
-	s += json();
-	client->text(s);
-}
-
-void Controller::queue_command(String s) {
-	DEBUG("Enqeueing command '%s'.\n", s.c_str());
-	_cmd_queue = s;
-}
-
-void Controller::update_playlist_manager() {
-	pm->scan_files();
-	send_playlist_manager_status();
-}
+}
\ No newline at end of file
diff --git a/src/data_sources.cpp b/src/data_sources.cpp
deleted file mode 100644
index 0fb4337..0000000
--- a/src/data_sources.cpp
+++ /dev/null
@@ -1,57 +0,0 @@
-#include "data_sources.h"
-
-////////////// SDDataSource //////////////
-SDDataSource::SDDataSource(String file) { _file = SD.open(file, "r"); }
-SDDataSource::~SDDataSource() { if (_file) _file.close(); }
-size_t SDDataSource::read(uint8_t* buf, size_t len) { return _file.read(buf, len); }
-int SDDataSource::read() { return _file.read(); }
-size_t SDDataSource::position() { return _file.position(); }
-void SDDataSource::seek(size_t position) { _file.seek(position); }
-size_t SDDataSource::size() { return _file.size(); }
-void SDDataSource::close() { _file.close(); }
-bool SDDataSource::usable() { return _file; }
-
-void SDDataSource::skip_id3_tag() {
-	uint32_t original_position = _file.position();
-	uint32_t offset = 0;
-	if (_file.read()=='I' && _file.read()=='D' && _file.read()=='3') {
-		DEBUG("ID3 tag found\n");
-		// Skip ID3 tag version
-		_file.read(); _file.read();
-		byte tags = _file.read();
-		bool footer_present = tags & 0x10;
-		DEBUG("ID3 footer found: %d\n", footer_present);
-		for (byte i=0; i<4; i++) {
-			offset <<= 7;
-			offset |= (0x7F & _file.read());
-		}
-		offset += 10;
-		if (footer_present) offset += 10;
-		DEBUG("ID3 tag length is %d bytes.\n", offset);
-		_file.seek(offset);
-	} else {
-		DEBUG("No ID3 tag found\n");
-		_file.seek(original_position);
-	}
-}
-
-
-
-////////////// HTTPSDataSource //////////////
-HTTPSDataSource::HTTPSDataSource(String url, uint32_t offset) {
-	_http = new HTTPClientWrapper();
-	if (!_http->get(url, offset)) return;
-	_position = 0;
-}
-
-HTTPSDataSource::~HTTPSDataSource() {
-	_http->close();
-	delete _http;
-}
-bool HTTPSDataSource::usable() { return _http; }
-size_t HTTPSDataSource::read(uint8_t* buf, size_t len) { size_t result = _http->read(buf, len); _position += result; return result; }
-int HTTPSDataSource::read() { int b = _http->read(); if (b>=0) _position++; return b; }
-size_t HTTPSDataSource::position() { return _position; }
-void HTTPSDataSource::seek(size_t position) { return; /* TODO */ }
-size_t HTTPSDataSource::size() { return _http->getSize(); }
-void HTTPSDataSource::close() { _http->close(); }
diff --git a/src/esmp3.cpp b/src/esmp3.cpp
new file mode 100644
index 0000000..1e3b830
--- /dev/null
+++ b/src/esmp3.cpp
@@ -0,0 +1,68 @@
+#include <WiFi.h>
+#include <ArduinoOTA.h>
+#include <SD.h>
+#include "spi_master.h"
+#include "playlist_manager.h"
+#include "controller.h"
+#include <Audio.h>
+#include "esmp3.h"
+#include <Ticker.h>
+
+Controller controller;
+Audio audio;
+Ticker ticker_save_audio_current_time;
+PlaylistManager* pm;
+
+void setup() {
+	Serial.begin(115200);
+	WiFi.begin("Schlenz", "1410WischlingenPanda");
+	Serial.print("Connecting to WiFi...");
+	while(WiFi.status() != WL_CONNECTED) {
+		Serial.print(".");
+		delay(500);
+	}
+	Serial.println();
+	Serial.print("Connected to WiFi. IP address: ");
+	Serial.println(WiFi.localIP());
+
+	ArduinoOTA.begin();
+	Serial.println("Initializing SPI...");
+	SPI.begin();
+	SPI.setHwCs(false);
+	SPIMaster::initialize();
+
+	Serial.print("Initializing SD card...");
+	SPIMaster::enable_sd();
+	while(!SD.begin(14, SPI, 25000000)) {
+		for(int i=0; i<10; i++) {
+			if(SPI.transfer(0xFF)==0xFF) break;
+			delay(10);
+		}
+		Serial.print(".");
+		delay(100);
+	}
+	Serial.println();
+
+	Serial.println("Initializing PlaylistManager...");
+	pm = new PlaylistManager();
+
+	Serial.println("Setting up audio...");
+	audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
+	audio.setVolume(15);
+	audio.forceMono(true);
+
+	Serial.println("Setting up tickers...");
+	ticker_save_audio_current_time.attach(5, save_audio_current_time);
+
+	Serial.println("Setup finished.");
+}
+
+void loop() {
+	ArduinoOTA.handle();
+	controller.handle();
+	audio.loop();
+}
+
+void save_audio_current_time() {
+	pm->set_audio_current_time(audio.getAudioCurrentTime());
+}
\ No newline at end of file
diff --git a/src/http_client_wrapper.cpp b/src/http_client_wrapper.cpp
deleted file mode 100644
index bb1a90a..0000000
--- a/src/http_client_wrapper.cpp
+++ /dev/null
@@ -1,213 +0,0 @@
-#include "http_client_wrapper.h"
-#include <WiFiClientSecure.h>
-
-HTTPClientWrapper::HTTPClientWrapper() {
-	_buffer = new uint8_t[512];
-	_buffer_size = 512;
-}
-
-HTTPClientWrapper::~HTTPClientWrapper() {
-	if (_http) {
-		_http->end();
-		delete _http;
-	}
-	delete _buffer;
-}
-
-void HTTPClientWrapper::close() {
-	_http->end();
-	_connected = false;
-}
-
-bool HTTPClientWrapper::get(String url, uint32_t offset, uint8_t redirection_count) { return _request("GET", url, offset, redirection_count); }
-bool HTTPClientWrapper::head(String url, uint32_t offset, uint8_t redirection_count) { return _request("HEAD", url, offset, redirection_count); }
-
-bool HTTPClientWrapper::_request(String method, String url, uint32_t offset, uint8_t redirection_count) {
-	if (redirection_count>=5) return false;
-	
-	//if (_http) delete _http;
-	
-	DEBUG("%s %s\n", method.c_str(), url.c_str());
-	_http = new HTTPClient();
-	
-	
-	_http->setUserAgent("PodBox/0.1");
-	if (offset) {
-		String s = "bytes=";
-		s += offset;
-		s += "-";
-		_http->addHeader("Range: ", s);
-	}
-	
-	const char* headers[] = {"Location", "Content-Type", "Transfer-Encoding"};
-	_http->collectHeaders(headers, 3);
-	bool result;
-	/*if (url.startsWith("https:")) {
-		BearSSL::WiFiClientSecure* client = new BearSSL::WiFiClientSecure();
-		client->setInsecure();
-		result = _http->begin(*client, url);
-	} else {
-		result = _http->begin(url);
-	}*/
-	result = _http->begin(url);
-	TRACE("HTTP->begin result: %d\n", result);
-	if (!result) return false;
-	
-	int status = _http->sendRequest(method.c_str());
-	TRACE("HTTP Status code: %d\n", status);
-	if (status == HTTP_CODE_FOUND || status==HTTP_CODE_MOVED_PERMANENTLY || status==HTTP_CODE_TEMPORARY_REDIRECT) {
-		if (_http->hasHeader("Location")) {
-			url = _http->header("Location");
-			_http->end();
-			delete _http;
-			_http = NULL;
-			return _request(method, url, offset, redirection_count+1);
-		} else {
-			ERROR("Got redirection HTTP code, but no Location header.\n");
-			delete _http;
-			_http = NULL;
-			return false;
-		}
-	} else if (status != HTTP_CODE_OK) {
-		DEBUG("Unexpected HTTP return code %d. Cancelling.\n", status);
-		return false;
-	}
-
-	_buffer_position = 0;
-	_buffer_length = 0;
-	
-	_connected = true;
-	_length = _http->getSize() + offset;
-	if (_http->hasHeader("Content-Type")) {
-		_content_type = _http->header("Content-Type");
-	} else {
-		_content_type = "";
-	}
-	_is_chunked = (_http->hasHeader("Transfer-Encoding")) && (_http->header("Transfer-Encoding").indexOf("chunked")!=-1);
-	_stream = _http->getStreamPtr();
-	if (_is_chunked) {
-		_read_next_chunk_header(true);
-	}
-	return true;
-}
-
-void HTTPClientWrapper::_read_next_chunk_header(bool first) {
-	if (!_connected) {
-		_chunk_length = 0;
-		return;
-	}
-	
-	if (!first) {
-		// read() returns an error if no bytes is available right at this moment.
-		// So we wait until 2 bytes are available or the connection times out.
-		while (_stream->connected() && !_stream->available()) { delay(1); }
-		int c1 = _stream->read();
-		while (_stream->connected() && !_stream->available()) { delay(1); }
-		int c2 = _stream->read();
-		if (c1==-1 || c2==-1) {
-			ERROR("Connection timeout.\n");
-			DEBUG("_stream.connected() returns %d\n", _stream->connected());
-			_chunk_length = 0;
-			_connected = false;
-			return;
-		} else if (c1!='\r' || c2!='\n') {
-			ERROR("Invalid chunk border found. Found: 0x%02X 0x%02X\n", c1, c2);
-			_chunk_length = 0;
-			_connected = false;
-			return;
-		}
-	}
-	String chunk_header = _stream->readStringUntil('\n');
-	chunk_header.trim();
-	_chunk_length = strtol(chunk_header.c_str(), NULL, 16);
-	if (_chunk_length == 0) {
-		_connected = false;
-		TRACE("Empty chunk found -> EOF reached.\n");
-	} else {
-		TRACE("Chunk found. Length: %d\n", _chunk_length);
-	}
-}
-
-uint16_t HTTPClientWrapper::_fill_buffer() {
-	if (!_connected) {
-		_buffer_position = 0;
-		_buffer_length = 0;
-		return 0;
-	}
-	
-	uint16_t bytes_to_fill = _buffer_size;
-	uint16_t bytes_filled = 0;
-	while (bytes_to_fill > 0) {
-		uint16_t bytes_to_request = bytes_to_fill;
-		if (_is_chunked && _chunk_length < bytes_to_fill) bytes_to_request = _chunk_length;
-		TRACE("fill_buffer loop. _is_chunked: %d, _chunk_length: %d, _buffer_size: %d, bytes_filled: %d, bytes_to_fill: %d, bytes_to_request: %d", _is_chunked, _chunk_length, _buffer_size, bytes_filled, bytes_to_fill, bytes_to_request);
-		uint16_t result = _stream->readBytes(_buffer + bytes_filled, bytes_to_request);
-		TRACE(", result: %d\n", result);
-		bytes_filled += result;
-		bytes_to_fill -= result;
-		if (_is_chunked) {
-			_chunk_length -= result;
-			if (_chunk_length == 0) _read_next_chunk_header(false);
-		}
-		if (result == 0) {
-			_connected = false;
-			break;
-		}
-	}
-	_buffer_position = 0;
-	_buffer_length = bytes_filled;
-	TRACE("Buffer filled. _buffer_length: %d\n", _buffer_length);
-	return bytes_filled;
-}
-
-String HTTPClientWrapper::getContentType() {
-	return _content_type;
-}
-
-int HTTPClientWrapper::read() {
-	if (_buffer_position >= _buffer_length) _fill_buffer();
-	if (_buffer_position >= _buffer_length) return -1;
-	return _buffer[_buffer_position++];
-}
-
-uint32_t HTTPClientWrapper::read(uint8_t* dst, uint32_t len) {
-	TRACE("Reading %d bytes...\n", len);
-	uint32_t bytes_filled = 0;
-	while (1) {
-		if (_buffer_position >= _buffer_length) _fill_buffer();
-		if (_buffer_position >= _buffer_length) break;
-
-		uint32_t bytes_to_fill = len;
-		if (bytes_to_fill > _buffer_length - _buffer_position) bytes_to_fill = _buffer_length - _buffer_position;
-
-		TRACE("read_loop: _buffer_length=%d, _buffer_position=%d, len=%d, bytes_to_fill=%d\n", _buffer_length, _buffer_position, len, bytes_to_fill);
-		memcpy(dst + bytes_filled, _buffer + _buffer_position, bytes_to_fill);
-		_buffer_position += bytes_to_fill;
-		bytes_filled += bytes_to_fill;
-		len -= bytes_to_fill;
-		if (bytes_to_fill==0 || len==0) break;
-	}
-	return bytes_filled;
-}
-
-uint32_t HTTPClientWrapper::getSize() {return _length; }
-
-String HTTPClientWrapper::readUntil(String sep) {
-	String result = "";
-	while(true) {
-		int i = read();
-		if (i==-1) break;
-		char c = i;
-		if (sep.indexOf(c)!=-1) {
-			// separator
-			if (result.length()>0) break;
-		} else {
-			result.concat(c);
-		}
-	}
-	return result;
-}
-
-String HTTPClientWrapper::readLine() {
-	return readUntil("\n\r");
-}
diff --git a/src/http_server.cpp b/src/http_server.cpp
deleted file mode 100644
index 087d9f7..0000000
--- a/src/http_server.cpp
+++ /dev/null
@@ -1,167 +0,0 @@
-#include "http_server.h"
-#include "main.h"
-#include "spi_master.h"
-#include <ESPmDNS.h>
-
-HTTPServer::HTTPServer(Player* p, Controller* c) {
-	_player = p;
-	_controller = c;
-	_server = new AsyncWebServer(80);
-	ws = new AsyncWebSocket("/ws");
-	_server->addHandler(ws);
-	ws->onEvent([&](AsyncWebSocket * server, AsyncWebSocketClient * client, AwsEventType type, void * arg, uint8_t *data, size_t len){this->_onEvent(server, client, type, arg, data, len);});
-	
-	_server->on("/", HTTP_GET, [&](AsyncWebServerRequest* req) {
-		req->send(200, "text/html", (const char*)file_index_html_start);
-	});
-	_server->on("/upload", HTTP_POST, [](AsyncWebServerRequest* req) {
-		req->send(200); 
-	}, [&](AsyncWebServerRequest *request, String filename, size_t index, uint8_t *data, size_t len, bool final) {
-		this->_handle_upload(request, filename, index, data, len, final);
-	});
-	_server->on("/_mapping.txt", HTTP_GET, [&](AsyncWebServerRequest* req) {
-		req->send(200, "text/plain", _controller->pm->create_mapping_txt());
-	});
-	_server->on("/player.json", HTTP_GET, [&](AsyncWebServerRequest* req) {
-		req->send(200, "application/json", _controller->player->json());
-	});
-	_server->on("/playlist_manager.json", HTTP_GET, [&](AsyncWebServerRequest* req) {
-		req->send(200, "application/json", _controller->pm->json());
-	});
-	_server->on("/controller.json", HTTP_GET, [&](AsyncWebServerRequest* req) {
-		req->send(200, "application/json", _controller->json());
-	});
-	_server->on("/position.json", HTTP_GET, [&](AsyncWebServerRequest* req) {
-		req->send(200, "application/json", _controller->player->position_json());
-	});
-	_server->on("/cmd", HTTP_POST, [&](AsyncWebServerRequest *req) {
-		if (req->hasParam("cmd", true)) {
-			_controller->queue_command(req->getParam("cmd", true)->value());
-			req->send(200);
-		} else {
-			req->send(400);
-		}
-	});
-	_server->begin();
-	MDNS.addService("http", "tcp", 80);
-}
-
-void HTTPServer::_handle_upload(AsyncWebServerRequest* request, String filename, size_t index, uint8_t* data, size_t len, bool final) {
-	// https://www.gnu.org/software/tar/manual/html_node/Standard.html
-	// https://www.mkssoftware.com/docs/man4/tar.4.asp
-	
-	if (index == 0) { // Starting upload
-		_chunk = new uint8_t[512];
-		_chunk_length = 0;
-		_upload_position = 0;
-		_file_size = 0;
-		_file_size_done = 0;
-		_need_header = true;
-	}
-	
-	uint32_t upload_offset = 0;
-	while (upload_offset < len) {
-		// Load a chunk
-		if (_chunk_length < 512 && len > upload_offset) {
-			uint16_t needed = 512 - _chunk_length;
-			if (needed > len - upload_offset) needed = len - upload_offset;
-			memcpy(_chunk + _chunk_length, data + upload_offset, needed);
-			_chunk_length += needed;
-			upload_offset += needed;
-			_upload_position += needed;
-		
-			if (_chunk_length == 512) {
-				// Process chunk
-				DEBUG(".");
-				if (_need_header) {
-					if (_chunk[257]=='u'&&_chunk[258]=='s'&&_chunk[259]=='t'&&_chunk[260]=='a'&&_chunk[261]=='r') {
-						DEBUG("It is a valid header, starting at 0x%X!\n", _upload_position-512);
-						char filename[200];
-						strncpy(filename, (char*)_chunk, 100);
-						DEBUG("filename: %s\n", filename);
-						_file_size = 0;
-						_file_size_done = 0;
-						for (int i=0; i<11; i++) {
-							//Serial.print(_header_buffer[124 + i]);
-							_file_size = (_file_size<<3) + (_chunk[124 + i] - '0');
-						}
-						DEBUG("filesize: %d\n", _file_size);
-						uint8_t type = _chunk[156] - '0';
-						if (type==0) {
-							String path = "/";
-							path += filename;
-							DEBUG("Opening file %s\n", path.c_str());
-							uint8_t state = SPIMaster::state;
-							SPIMaster::disable();
-							SPIMaster::select_sd();
-							// Better safe than sorry. ;-)
-							_upload_file.close();
-							_upload_file = SD.open(path, "w");
-							SPIMaster::set_state(state);
-						} else if (type==5) {
-							String dirname = "/";
-							dirname += filename;
-							dirname.remove(dirname.length()-1);
-							uint8_t state = SPIMaster::state;
-							SPIMaster::disable();
-							SPIMaster::select_sd();
-							bool res = SD.mkdir(dirname);
-							SPIMaster::set_state(state);
-							DEBUG("Creating folder '%s' returned %d.\n", dirname.c_str(), res);
-						} else {
-							ERROR("Unknown file type %d\n", type);
-						}
-						_need_header = (type==5 || _file_size==0); // No chunks needed for directories.
-					} else {
-						bool byte_found = false;
-						for (int i=0; i<512; i++) byte_found = byte_found || _chunk[i]>0;
-						if (!byte_found) {
-							DEBUG("Empty chunk while looking for header -> ignoring.\n");
-						} else {
-							ERROR("Invalid tar header: %c %c %c %c %c. Looking at header start offset 0x%X.\n", _chunk[257], _chunk[258], _chunk[259], _chunk[260], _chunk[261], _upload_position-512);
-						}
-					}
-				} else {
-					uint32_t bytes_to_write = _file_size - _file_size_done;
-					if (bytes_to_write > 512) bytes_to_write=512;
-					uint8_t state = SPIMaster::state;
-					SPIMaster::disable();
-					SPIMaster::select_sd();
-					_upload_file.write(_chunk, bytes_to_write);
-					_file_size_done += bytes_to_write;
-					if (_file_size_done >= _file_size) {
-						_upload_file.close();
-						_need_header = true;
-					}
-					SPIMaster::set_state(state);
-				}
-				
-				_chunk_length = 0;
-			}
-		}
-	}
-
-	if (final == true) {
-		uint8_t state = SPIMaster::state;
-		SPIMaster::disable();
-		SPIMaster::select_sd();
-		_upload_file.close();
-		SPIMaster::set_state(state);
-		delete _chunk;
-		_controller->update_playlist_manager();
-		return;
-	}
-}
-
-void HTTPServer::_onEvent(AsyncWebSocket * server, AsyncWebSocketClient * client, AwsEventType type, void * arg, uint8_t *data, size_t len) {
-	if (type==WS_EVT_CONNECT) {
-		_controller->inform_new_client(client);
-	} else if (type==WS_EVT_DATA) {
-		AwsFrameInfo* info = (AwsFrameInfo*) arg;
-		if (info->final && info->index==0 && info->len==len && info->opcode==WS_TEXT) {
-			data[len]='\0';
-			DEBUG("Received ws message: %s\n", (char*)data);
-			_controller->queue_command((char*)data);
-		}
-	}
-}
diff --git a/src/index.html b/src/index.html
deleted file mode 100644
index e9048f8..0000000
--- a/src/index.html
+++ /dev/null
@@ -1,359 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-	<meta charset="utf-8">
-	<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
-	<title>ESMP3</title>
-	<script src="https://code.jquery.com/jquery-3.4.1.slim.min.js" integrity="sha256-pasqAKBDmFT4eHoN2ndd6lN370kFiGUFyTiUHWhU7k8=" crossorigin="anonymous"></script>
-	<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
-	<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
-	<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
-	<script src="https://kit.fontawesome.com/272149490a.js" crossorigin="anonymous"></script>
-	<style>
-		.overlay {
-			width: 100%;
-			height: 100%;
-			background-color: rgba(0, 0, 0, 0.85);
-			position: absolute;
-			z-index: 1;
-			margin: auto 0px;
-			vertical-align: middle;
-			color: white;
-			font-size: 60px;
-			text-align: center;
-		}
-	</style>
-</head>
-
-<body>
-	<div id="overlay" class="overlay">Not connected...</div>
-	<div class="container bg-dark text-light">
-		<div class="row">
-			<div class="col-sm-1">
-				<h1 id="play_state_icon"><i class="fa fa-stop"></i></h1>
-			</div>
-			<div class="col-sm-11">
-				<h2><i class="fa fa-compact-disc"></i> <span id="album"></span></h2>
-				<h2><i class="fa fa-scroll"></i> <span id="track"></span></h2>
-			</div>
-		</div>
-	</div>
-	<div class="container">
-		<div class="row">
-			<div class="col">
-				<input type="range" class="custom-range" id="position_slider" disabled>
-			</div>
-		</div>
-		<div class="row">
-			<div class="col-sm-6">
-			</div>
-			<div class="col-sm-1">
-				<h3><i class="fa fa-volume-down"></i></h3>
-			</div>
-			<div class="col-sm-4">
-				<input type="range" class="custom-range" id="volume_slider">
-			</div>
-			<div class="col-sm-1">
-				<h3><i class="fa fa-volume-up"></i></h3>
-			</div>
-		</div>
-		<div class="row">
-			<div class="col">
-				<button type="button" class="btn btn-primary btn-lg btn-block" id="button_track_prev"><i class="fa fa-step-backward"></i></button>
-			</div>
-			<div class="col">
-				<button type="button" class="btn btn-primary btn-lg btn-block" id="button_stop"><i class="fa fa-stop"></i></button>
-			</div>
-			<div class="col">
-				<button type="button" class="btn btn-primary btn-lg btn-block" id="button_play"><i class="fa fa-play"></i></button>
-			</div>
-			<div class="col">
-				<button type="button" class="btn btn-primary btn-lg btn-block" id="button_track_next"><i class="fa fa-step-forward"></i></button>
-			</div>
-			<div class="col">
-				<button type="button" class="btn btn-primary btn-lg btn-block" id="button_lock"><i class="fa fa-lock-open"></i></button>
-			</div>
-			<div class="col">
-				<button type="button" class="btn btn-primary btn-lg btn-block" id="button_open"><i class="fa fa-eject"></i></button>
-			</div>
-			<div class="col">
-				<button type="button" class="btn btn-primary btn-lg btn-block" id="button_settings"><i class="fa fa-cog"></i></button>
-			</div>
-		</div>
-	</div>
-	
-	<div class="container">
-		<table class="table table-hover table-sm" id="track_list_table">
-			<thead class="thead-light">
-				<tr>
-					<th>Nr.</th>
-					<th>Status</th>
-					<th>Track</th>
-				</tr>
-			</thead>
-			<tbody class="" id="track_list">
-			
-			</tbody>
-		</table>
-	</div>
-	
-	
-	
-	<div class="modal fade" id="openModal" tabindex="-1" role="dialog">
-		<div class="modal-dialog modal-dialog-centered modal-dialog-scrollable" role="document">
-			<div class="modal-content">
-				<div class="modal-header">
-					<h5 class="modal-title">Album öffnen</h5>
-					<button type="button" class="close" data-dismiss="modal">
-						<span>&times;</span>
-					</button>
-				</div>
-
-				<h6>Open URL</h6>
-				<div class="input-group">
-					<div class="input-group-prepend">
-						<span class="input-group-text">
-							<i class="fa fa-link"></i>
-						</span>
-					</div>
-					<input type="text" class="form-control" id="input_url" />
-					<div class="input-group-append">
-						<button class="btn btn-primary" id="button_url_open">Go</button>
-						<button class="btn btn-warning" id="button_url_add_mapping" style="display: none;"><i class="fa fa-arrows-alt-h"></i></button>
-					</div>
-				</div>
-				
-				<div class="modal-body">
-					<div id="albums_without_id_area">
-						<h6>Albums without RFID card</h6>
-						<table class="table table-hover table-sm">
-							<tbody id="albums_without_id">
-							</tbody>
-						</table>
-					</div>
-					
-					<h6>Albums with RFID</h6>
-					<table class="table table-hover table-sm">
-						<tbody id="albums_with_id">
-						</tbody>
-					</table>
-				</div>
-				
-				<div class="modal-footer">
-					<button type="button" class="btn btn-primary" data-dismiss="modal">Close</button>
-				</div>
-			</div>
-		</div>
-	</div>
-
-	<div class="modal fade" id="settingsModal" tabindex="-1" role="dialog">
-			<div class="modal-dialog modal-dialog-centered modal-dialog-scrollable" role="document">
-				<div class="modal-content">
-					<div class="modal-header">
-						<h5 class="modal-title">Settings</h5>
-						<button type="button" class="close" data-dismiss="modal">
-							<span>&times;</span>
-						</button>
-					</div>
-					
-					<div class="modal-body">
-						<h6>Last RFID id:</h6>
-						<span id="last_rfid_id"></span> <button class="btn btn-warning" id="button_add_mapping"><i class="fa fa-arrows-alt-h"></i></button>
-						
-						<h6>Last RFID data:</h6>
-						<span id="last_rfid_data"></span>
-
-						<h6>Actions</h6>
-						<button type="button" class="btn btn-danger btn-lg btn-block" id="button_reset_vs1053">Reset VS1053 chip</button>
-						<button type="button" class="btn btn-danger btn-lg btn-block" id="button_reboot">Reboot ESMP3</button>
-						<button type="button" class="btn btn-danger btn-lg btn-block" id="button_update">Check for and install update</button>
-					</div>
-					
-					<div class="modal-footer">
-						<button type="button" class="btn btn-primary" data-dismiss="modal">Close</button>
-					</div>
-				</div>
-			</div>
-		</div>
-</body>
-
-<script>
-update_player = function(data) {
-	$('#play_state_icon i').removeClass('fa-stop', 'fa-play').addClass(data.playing ? 'fa-play' : 'fa-stop');
-	
-	if (data.playing) {
-		$('#button_play').removeClass('btn-primary').addClass('btn-secondary', 'btn-disabled');
-		$('#button_stop').removeClass('btn-secondary', 'btn-disabled').addClass('btn-primary');
-	} else if (data.playlist) {
-		$('#button_play').removeClass('btn-secondary', 'btn-disabled').addClass('btn-primary');
-		$('#button_stop').removeClass('btn-primary').addClass('btn-secondary', 'btn-disabled');
-	} else {
-		$('#button_play').removeClass('btn-primary').addClass('btn-secondary', 'btn-disabled');
-		$('#button_stop').removeClass('btn-primary').addClass('btn-secondary', 'btn-disabled');
-	}
-	
-	$('#volume_slider').attr('min', data.volume.min).attr('max', data.volume.max).val(data.volume.current);
-	
-	if (data.playlist) update_playlist(data.playlist);
-}
-
-update_playlist = function(data) {
-	$('#track_list tr').remove();
-	for (var i=0; i<data.files.length; i++) {
-		tr = $('<tr>').data('track', i);
-		tr.append($('<td>').html(i + 1));
-		tr.append($('<td>').html(data.current_track==i ? '<i class="fa fa-play"></i>' : ''));
-		tr.append($('<td>').html(data.files[i].title));
-		$('#track_list').append(tr);
-	}
-	
-	if (data.has_track_next) {
-		$('#button_track_next').removeClass('btn-secondary', 'btn-disabled').addClass('btn-primary');
-	} else {
-		$('#button_track_next').removeClass('btn-primary').addClass('btn-secondary', 'btn-disabled');
-	}
-	
-	if (data.has_track_prev) {
-		$('#button_track_prev').removeClass('btn-secondary', 'btn-disabled').addClass('btn-primary');
-	} else {
-		$('#button_track_prev').removeClass('btn-primary').addClass('btn-secondary', 'btn-disabled');
-	}
-	
-	$('#album').html(data.title);
-	var file = data.files[data.current_track];
-	if (file) {
-		$('#track').html(file.title); 
-	}
-}
-
-update_controller = function(data) {
-	if (data.lock_state == "locked") {
-		$('#button_lock').removeClass('btn-primary', 'btn-warning').addClass('btn-danger');
-		$('#button_lock i').removeClass('fa-lock-open').addClass('fa-lock');
-	} else if (data.lock_state == "locking") {
-		$('#button_lock').removeClass('btn-primary', 'btn-danger').addClass('btn-warning');
-		$('#button_lock i').removeClass('fa-lock-open').addClass('fa-lock');
-	} else {
-		$('#button_lock').removeClass('btn-danger', 'btn-warning').addClass('btn-primary');
-		$('#button_lock i').removeClass('fa-lock').addClass('fa-lock-open');
-	}
-
-	$('#button_add_mapping').toggle(data.last_rfid.uid.length>0);
-	$('#last_rfid_id').html(data.last_rfid.uid);
-	$('#last_rfid_data').html(data.last_rfid.data);
-}
-
-update_playlist_manager = function(data) {
-	if (data.unmapped.length > 0) {
-		$('#albums_without_id_area').show();
-		$('#albums_without_id tr').remove();
-		data.unmapped = data.unmapped.sort();
-		for (var i=0; i<data.unmapped.length; i++) {
-			var tr = $('<tr>').attr('data-folder', data.unmapped[i]);
-			tr.append($('<td>').html(data.unmapped[i].substr(1)));
-			tr.append($('<td>').append($('<button>').addClass('button btn-warning add_mapping_button').hide().append($('<i>').addClass('fa fa-arrows-alt-h'))));
-			$('#albums_without_id').append(tr);
-		}
-	} else {
-		$('#albums_without_id_area').hide();
-	}
-	
-	var folders = Object.keys(data.folders).sort();
-	for (var i in folders) {
-		var folder = folders[i];
-		var tr = $('<tr>').attr('data-folder', folder);
-		tr.append($('<td>').html(folder.substr(1)));
-		tr.append($('<td>').append($('<button>').addClass('button btn-danger add_mapping_button').hide().append($('<i>').addClass('fa fa-arrows-alt-h'))));
-		$('#albums_with_id').append(tr);
-	}
-}
-
-update_position = function(data) {
-	$('#position_slider').attr('max', data.file_size).val(data.position);
-}
-
-process_ws_message = function(event) {
-	var data = event.data.split("\n");;
-	for (var i=0; i<data.length; i++) {
-		var json = JSON.parse(data[i]);
-		console.log(json);
-		if (json === null) continue;
-		switch(json["_type"]) {
-			case "position": update_position(json); break;
-			case "player": update_player(json); break;
-			case "playlist_manager": update_playlist_manager(json); break;
-			case "controller": update_controller(json); break;
-		}	
-	}
-}
-
-var play_on_click = true;
-interval = null;
-ws = null;
-
-var start_reconnect_timer = function() {
-	console.log("start_reconnect_timer() running...");
-	$('#overlay').show();
-	interval = setInterval(connect_to_ws, 2500);
-}
-
-var connect_to_ws = function() {
-	if (!ws || ws.readyState >= ws.CLOSING) {
-		ws = new WebSocket("ws://" + location.host + "/ws");
-		ws.onopen = function() {
-			console.log("on_open() running...");
-			clearInterval(interval);
-			$('#overlay').hide();
-		};
-		ws.onmessage = process_ws_message;
-		ws.onclose = start_reconnect_timer;
-	}
-}
-
-$(function() {
-	start_reconnect_timer();
-	
-	$('#volume_slider').change(function(e) { ws.send("volume=" + e.target.value); });
-	$('#button_play').click(function(e) { ws.send("play"); });
-	$('#button_stop').click(function(e) { ws.send("stop"); });
-	$('#button_track_next').click(function(e) { ws.send("track_next"); });
-	$('#button_track_prev').click(function(e) { ws.send("track_prev"); });
-	$('#button_open').click(function(e) { $('#openModal').modal('show'); });
-	$('#track_list').on('click', 'tr', function(e) { ws.send("track=" + $(e.target).parent().data('track')); });
-	$('#albums_without_id, #albums_with_id').on('click', 'tr', function(e) { if (play_on_click) {ws.send("play " + $(e.target).parents('tr').data('folder')); $('#openModal').modal('hide');} });
-	$('#button_settings').click(function(e) { $('#settingsModal').modal('show'); });
-	$('#button_reset_vs1053').click(function(e) { ws.send("reset_vs1053"); $('#settingsModal').modal('hide'); });
-	$('#button_reboot').click(function(e) { ws.send("reboot"); $('#settingsModal').modal('hide'); });
-	$('#button_update').click(function(e) { ws.send("update"); $('#settingsModal').modal('hide'); });
-	$('#button_url_open').click(function(e) { ws.send("play " + $('#input_url').val()); $('#openModal').modal('hide');});
-	$('#button_add_mapping').click(function(e) {
-		$('#settingsModal').modal('hide');
-		$('#openModal').modal('show');
-		$('.add_mapping_button').show();
-		$('#button_url_open').hide();
-		$('#button_url_add_mapping').show();
-		play_on_click = false;
-	});
-	$('#openModal').on('click', '.add_mapping_button', function(e) {
-		ws.send("add_mapping=" + $('#last_rfid_id').html() + "=" + $(e.target).parents('tr').data('folder'));
-		$('#openModal').modal('hide');
-		$('.add_mapping_button').hide();
-		$('#button_url_open').hide();
-		$('#button_url_add_mapping').show();
-		e.stopPropagation();
-		play_on_click=true;
-		return false;
-	});
-	$('#button_url_add_mapping').click(function(e) {
-		ws.send("add_mapping=" + $('#last_rfid_id').html() + "=" + $('#input_url').val());
-		$('#openModal').modal('hide');
-		$('.add_mapping_button').hide();
-		$('#button_url_open').hide();
-		$('#button_url_add_mapping').show();
-		e.stopPropagation();
-		play_on_click=true;
-		return false;
-	});
-});
-</script>
-</html>
diff --git a/src/main.cpp b/src/main.cpp
deleted file mode 100644
index ecbb014..0000000
--- a/src/main.cpp
+++ /dev/null
@@ -1,149 +0,0 @@
-#include <Arduino.h>
-#include <ArduinoOTA.h>
-#include <SPI.h>
-#include <SD.h>
-#include <WiFi.h>
-#include <WiFiMulti.h>
-#include <ESPmDNS.h>
-#include <Preferences.h>
-#include "main.h"
-#include "config.h"
-#include "controller.h"
-#include "player.h"
-#include "spi_master.h"
-#include "http_server.h"
-#include "playlist_manager.h"
-#include "updater.h"
-
-Controller* controller;
-Player* player;
-PlaylistManager* pm;
-HTTPServer* http_server;
-
-uint8_t SPIMaster::state = 0;
-
-bool debug_enabled = true;
-bool trace_enabled = false;
-Preferences prefs;
-
-void wifi_connect() {
-	INFO("Connecting to WiFi...\n");
-	WiFiMulti wifi;
-	SPIMaster::select_sd();
-	if (SD.exists("/_wifis.txt")) {
-		DEBUG("Reading /_wifis.txt\n");
-		File f = SD.open("/_wifis.txt", "r");
-		while (String line = f.readStringUntil('\n')) {
-			if (line.length()==0) {
-				break;
-			} else if (line.startsWith("#") || line.indexOf('=')==-1) {
-				continue;
-			}
-			String ssid = line.substring(0, line.indexOf('='));
-			String pass = line.substring(line.indexOf('=')+1);
-			wifi.addAP(ssid.c_str(), pass.c_str());
-		}
-		f.close();
-	} else {
-		File f = SD.open("/_wifis.txt", "w");
-		f.print("# WiFi definitions. Syntax: <SSID>=<PASS>. Lines starting with # are ignored. Example:\n# My WiFi=VerySecretPassword\n");
-		f.close();
-	}
-	SPIMaster::select_sd(false);
-
-	#if defined(WIFI_SSID) and defined(WIFI_PASS)
-	wifi.addAP(WIFI_SSID, WIFI_PASS);
-	#endif
-
-	if (wifi.run() == WL_CONNECTED) {
-		INFO("Connected to WiFi \"%s\".\n", WiFi.SSID().c_str());
-		INFO("Local IP address: %s\n", WiFi.localIP().toString().c_str());
-	} else {
-		DEBUG("No WiFi connection!\n");
-	}
-}
-
-void setup() {
-	// Small delay to give the Serial console a bit of time to connect.
-	delay(1000);
-	Serial.begin(115200);
-	Serial.println("Starting...");
-	Serial.println("Started.");
-	INFO("Starting.\n");
-	#ifdef VERSION
-		INFO("ESMP3 version %s (OTA_VERSION %d)\n", VERSION, OTA_VERSION);
-	#else
-		INFO("ESMP3, version unknown (OTA_VERSION %d)\n", OTA_VERSION);
-	#endif
-	INFO("Initializing...\n");
-	prefs.begin("esmp3");
-	debug_enabled = prefs.getBool("debug_enabled", true);
-	trace_enabled = prefs.getBool("trace_enabled", false);
-delay(1000);
-	PIN_SPEAKER_L_SETUP();delay(1000);
-	PIN_SPEAKER_R_SETUP();delay(1000);
-	PIN_SPEAKER_L(LOW);delay(1000);
-	PIN_SPEAKER_R(LOW);delay(1000);
-
-	DEBUG("Setting up SPI...\n");delay(1000);
-	SPI.begin();
-	SPI.setHwCs(false);
-	SPIMaster::init();
-	SPIMaster* spi = new SPIMaster();
-	INFO("SPI initialized.\n");
-
-	DEBUG("Setting up SD card...\n");
-	spi->select_sd();
-	if (SD.begin(14, SPI, 25000000)) {
-		INFO("SD card initialized.\n");
-	} else {
-		ERROR("Could not initialize SD card.\n");
-	}
-	spi->select_sd(false);
-
-	DEBUG("Initializing PlaylistManager...\n");
-	pm = new PlaylistManager();
-	
-	DEBUG("Initializing Player and Controller...\n");
-	player = new Player(spi);
-    controller = new Controller(player, pm);
-    INFO("Player and controller initialized.\n");
-
-    wifi_connect();
-
-	ArduinoOTA.begin();
-	
-	MDNS.begin("esmp3");
-
-    DEBUG("Setting up HTTP server...\n");
-	http_server = new HTTPServer(player, controller);
-	controller->register_http_server(http_server);
-	
-	DEBUG("Starting NTP client...\n");
-	// Taken from https://github.com/esp8266/Arduino/blob/master/cores/esp8266/TZ.h
-	configTzTime("CET-1CEST,M3.5.0,M10.5.0/3", "europe.pool.ntp.org");
-	struct tm time;
-	if (getLocalTime(&time, 10000)) {
-		char buffer[100];
-		strftime(buffer, 100, "%Y-%m-%d %H:%M:%S", &time);
-		DEBUG("Got time: %s\n", buffer);
-	} else {
-		INFO("Could not fetch current time via NTP.\n");
-	}
-
-	#ifdef VERSION
-		INFO("ESMP3 version %s (OTA_VERSION %d)\n", VERSION, OTA_VERSION);
-	#else
-		INFO("ESMP3, version unknown (OTA_VERSION %d)\n", OTA_VERSION);
-	#endif
-	
-    INFO("Initialization completed.\n");
-}
-
-void loop() {
-	bool more_data_needed = player->loop();
-	if (more_data_needed) return;
-
-	controller->loop();
-	ArduinoOTA.handle();
-}
diff --git a/src/player.cpp b/src/player.cpp
deleted file mode 100644
index e3b4740..0000000
--- a/src/player.cpp
+++ /dev/null
@@ -1,753 +0,0 @@
-// Based on https://github.com/mpflaga/Arduino_Library-vs1053_for_SdFat/blob/master/src/vs1053_SdFat.cpp
-
-#include "player.h"
-#include "spi_master.h"
-#include <ArduinoJson.h>
-
-//Player::_spi_settings
-
-Player::Player(SPIMaster* s) {
-	_spi = s;
-	PIN_VS1053_XRESET_SETUP();
-	PIN_VS1053_XRESET(HIGH);
-	_speaker_off();
-	_spi->disable();
-	PIN_VS1053_DREQ_SETUP();
-	
-	init();
-}
-
-void Player::register_controller(Controller* c) {
-	_controller = c;
-}
-
-void Player::_reset() {
-	PIN_VS1053_XRESET(LOW);
-	delay(100);
-	PIN_VS1053_XRESET(HIGH);
-	delay(100);
-	_state = uninitialized;
-	_spi_settings = &_spi_settings_slow; // After reset, communication has to be slow
-}
-
-void Player::init() {
-	DEBUG("Resetting VS1053...\n");
-	_reset();
-
-	uint16_t result = _read_control_register(SCI_MODE);
-	DEBUG("SCI_MODE: 0x%04X\n", result);
-	if (result != 0x4800) {
-		ERROR("SCI_MODE was 0x%04X, expected was 0x4800. Rebooting.\n", result);
-		delay(500);
-		ESP.restart();
-	}
-	result = _read_control_register(SCI_STATUS);
-	DEBUG("SCI_STATUS: 0x%04X\n", result);
-	if (result != 0x0040 && result != 0x0048) {
-		ERROR("SCI_STATUS was 0x%04X, expected was 0x0040 or 0x0048. Rebooting.\n", result);
-		delay(500);
-		ESP.restart();
-	}
-	result = _read_control_register(SCI_CLOCKF);
-	DEBUG("SCI_CLOCKF: 0x%04X\n", result);
-
-	DEBUG("VS1053 Init looking good.\n");
-	DEBUG("Upping VS1053 multiplier...\n");
-
-	_write_control_register(SCI_CLOCKF, 0xC000);
-	delay(10);
-
-	_spi_settings = &_spi_settings_fast;
-
-	result = _read_control_register(SCI_CLOCKF);
-	DEBUG("SCI_CLOCKF: 0x%04X\n", result);
-	if (result != 0xC000) {
-		ERROR("Error: SCI_CLOCKF was 0x%04X, expected was 0xC000. Rebooting.\n", result);
-		delay(500);
-		ESP.restart();
-	}
-
-	set_volume(VOLUME_DEFAULT);
-
-	INFO("VS1053 initialization completed.\n");
-
-	_state = idle;
-}
-
-void Player::_speaker_off() {
-	DEBUG("Speaker off\n");
-	PIN_SPEAKER_L(LOW);
-	PIN_SPEAKER_R(LOW);
-}
-
-void Player::_speaker_on() {
-	DEBUG("Speaker on\n");
-	PIN_SPEAKER_L(HIGH);
-	PIN_SPEAKER_R(HIGH);
-}
-
-void Player::_sleep() {
-	DEBUG("VS1053 going to sleep.\n");
-	_speaker_off();
-	_write_control_register(SCI_CLOCKF, 0x0000);
-	_spi_settings = &_spi_settings_slow;
-	_write_control_register(SCI_AUDATA, 0x0010);
-	set_volume(0, false);
-	_state = sleeping;
-	TRACE("VS1053 is sleeping now.\n");
-}
-
-void Player::_wakeup() {
-	if (_state != sleeping && _state != recording) return;
-	_stopped_at = millis();
-	DEBUG("Waking VS1053...\n");
-	set_volume(_volume, false);
-	_write_control_register(SCI_AUDATA, 0x0000);
-	_write_control_register(SCI_CLOCKF, 0x6000);
-	_write_control_register(SCI_MODE, 0x4800 | SM_RESET);
-	delay(10);
-	//_speaker_on();
-	_spi_settings = &_spi_settings_fast;
-	_state = idle;
-}
-
-void Player::_record() {
-	// http://www.vlsi.fi/fileadmin/software/VS10XX/VS1053_VS1063_PcmRecorder.pdf
-	DEBUG("Starting recording.\n");
-	set_volume(1, false);
-	
-	// Disable SCI_BASS
-	_write_control_register(SCI_BASS, 0);
-	
-	// Disable user applications
-	_write_control_register(SCI_AIADDR, 0);
-	
-	// Disable interrupts
-	_write_control_register(SCI_WRAMADDR, 0xC01A);
-	_write_control_register(SCI_WRAM, 0x0002);
-	
-	_patch_adpcm();
-	
-	_write_control_register(SCI_MODE, SM_ADPCM);
-	
-	_write_control_register(SCI_AICTRL0, 0x8000); // Mono VU meter
-	_write_control_register(SCI_AICTRL1, 1024); // Manual gain, 1x
-	_write_control_register(SCI_AICTRL2, 0); // Maximum gain for autogain - ignored
-	_write_control_register(SCI_AICTRL3, 0); // status: record
-	
-	_write_control_register(SCI_AIADDR, 0x0034, false);
-	delay(1);
-	
-	DEBUG("Recording.\n");
-	delay(10);
-	_state = recording;
-}
-
-inline void Player::_wait() {
-	while(!PIN_VS1053_DREQ());
-}
-
-uint16_t Player::_read_control_register(uint8_t address, bool do_wait) {
-	if (do_wait) _wait();
-	_spi->select_vs1053_xcs();
-	SPI.beginTransaction(*_spi_settings);
-	SPI.transfer(CMD_READ);
-	SPI.transfer(address);
-	uint8_t b1 = SPI.transfer(0xFF);
-	_wait();
-	uint8_t b2 = SPI.transfer(0xFF);
-	_wait();
-	SPI.endTransaction();
-	_spi->select_vs1053_xcs(false);
-
-	return (b1 << 8) | b2;
-}
-
-void Player::_write_control_register(uint8_t address, uint16_t value, bool do_wait) {
-	_wait();
-	_spi->select_vs1053_xcs();
-	SPI.beginTransaction(*_spi_settings);
-	SPI.transfer(CMD_WRITE);
-	SPI.transfer(address);
-	SPI.transfer(value >> 8);
-	SPI.transfer(value & 0xFF);
-	SPI.endTransaction();
-	_spi->select_vs1053_xcs(false);
-	if (do_wait) _wait();
-}
-
-void Player::_patch_adpcm() {
-	static const uint16_t patch_data[] = {
-		0x0007, 0x0001, 0xc01a, 0x0006, 0x0001, 0x0002, 0x0007, 0x0001, /*    0 */
-		0x0008, 0x0006, 0x8002, 0x0000, 0x0007, 0x0001, 0x000c, 0x0006, /*    8 */
-		0x0002, 0x7000, 0x0017, 0x0007, 0x0001, 0x8034, 0x0006, 0x0022, /*   10 */
-		0x0030, 0x0490, 0xb080, 0x0024, 0x3800, 0x0024, 0x0000, 0x1090, /*   18 */
-		0xf400, 0x5404, 0x0000, 0x0851, 0xf400, 0x5648, 0xf400, 0x5404, /*   20 */
-		0xf400, 0x5658, 0xf400, 0x5404, 0xf400, 0x5640, 0x0000, 0x800a, /*   28 */
-		0x2900, 0x9180, 0x0006, 0x2016, 0x2a00, 0x1bce, 0x2a00, 0x114e, /*   30 */
-		0x2a00, 0x168e, 0x0007, 0x0001, 0x1800, 0x0006, 0x8006, 0x0000, /*   38 */
-		0x0007, 0x0001, 0x8045, 0x0006, 0x002a, 0x3e12, 0xb817, 0x3e12, /*   40 */
-		0x7808, 0x3e18, 0x3821, 0x3e18, 0xb823, 0x3e15, 0x4024, 0x3e10, /*   48 */
-		0x7800, 0x48b2, 0x0024, 0x0000, 0x800a, 0x2900, 0x3e80, 0x3e10, /*   50 */
-		0x7800, 0x36f0, 0x5800, 0x2210, 0x0000, 0x36f0, 0x5800, 0x36f5, /*   58 */
-		0x4024, 0x36f8, 0x9823, 0x36f8, 0x1821, 0x36f2, 0x5808, 0x3602, /*   60 */
-		0x8024, 0x0030, 0x0717, 0x2100, 0x0000, 0x3f05, 0xdbd7, 0x0007, /*   68 */
-		0x0001, 0x805a, 0x0006, 0x002a, 0x3e12, 0xb817, 0x3e12, 0x7808, /*   70 */
-		0x3e18, 0x3821, 0x3e18, 0xb823, 0x3e15, 0x4024, 0x3e10, 0x7800, /*   78 */
-		0x48b2, 0x0024, 0x0000, 0x800a, 0x2900, 0x5e40, 0x3e10, 0x7800, /*   80 */
-		0x36f0, 0x5800, 0x2210, 0x0000, 0x36f0, 0x5800, 0x36f5, 0x4024, /*   88 */
-		0x36f8, 0x9823, 0x36f8, 0x1821, 0x36f2, 0x5808, 0x3602, 0x8024, /*   90 */
-		0x0030, 0x0717, 0x2100, 0x0000, 0x3f05, 0xdbd7, 0x0007, 0x0001, /*   98 */
-		0x806f, 0x0006, 0x0030, 0x3e12, 0xb817, 0x3e12, 0x7808, 0x3e18, /*   a0 */
-		0x3821, 0x3e18, 0xb823, 0x3e10, 0x7800, 0xb880, 0x3855, 0x0030, /*   a8 */
-		0x0497, 0x48b2, 0x3c00, 0x0000, 0x800a, 0x2900, 0x7300, 0x3e10, /*   b0 */
-		0x7800, 0x36f0, 0x5800, 0x2210, 0x0000, 0x6890, 0x1bd5, 0x0030, /*   b8 */
-		0x0497, 0x3f00, 0x0024, 0x36f0, 0x5800, 0x36f8, 0x9823, 0x36f8, /*   c0 */
-		0x1821, 0x36f2, 0x5808, 0x3602, 0x8024, 0x0030, 0x0717, 0x2100, /*   c8 */
-		0x0000, 0x3f05, 0xdbd7, 0x0007, 0x0001, 0x8010, 0x0006, 0x000e, /*   d0 */
-		0x3e02, 0x8024, 0x0001, 0x000a, 0x6012, 0x0024, 0xfea2, 0x0024, /*   d8 */
-		0x48b2, 0x1bca, 0x2000, 0x0000, 0x4180, 0x0024, 0x0007, 0x0001, /*   e0 */
-		0x8087, 0x0006, 0x00e6, 0x3e00, 0x7843, 0x3e01, 0x3845, 0x3e04, /*   e8 */
-		0x3812, 0x0006, 0x08d0, 0x3000, 0x4024, 0x6182, 0x0024, 0x0030, /*   f0 */
-		0x06d0, 0x2800, 0x2655, 0xb882, 0x0024, 0x0000, 0x0201, 0x0000, /*   f8 */
-		0x0005, 0x0030, 0x0210, 0xa016, 0x4004, 0x1fff, 0xfe01, 0xae1a, /*  100 */
-		0x0024, 0xc342, 0x0024, 0xb882, 0x2001, 0x0030, 0x06d0, 0x3800, /*  108 */
-		0x4024, 0x0006, 0x0890, 0x3004, 0x0024, 0x3000, 0x4024, 0x0006, /*  110 */
-		0x12d0, 0x6182, 0x0024, 0x3000, 0x4024, 0x2800, 0x3e05, 0xf400, /*  118 */
-		0x4050, 0x3009, 0x2000, 0x0006, 0x08d0, 0x0006, 0x0892, 0x3000, /*  120 */
-		0x4024, 0x6192, 0x0024, 0x3800, 0x4024, 0x0030, 0x0250, 0xb882, /*  128 */
-		0x2001, 0x0030, 0x0710, 0x3800, 0x4024, 0x0006, 0x12d0, 0x3000, /*  130 */
-		0x4024, 0x6192, 0x0024, 0x3800, 0x4024, 0x3204, 0x0024, 0x3023, /*  138 */
-		0x0024, 0x30e0, 0xc024, 0x6312, 0x0024, 0x0000, 0x00c3, 0x2800, /*  140 */
-		0x3141, 0x0000, 0x0024, 0x3033, 0x0024, 0x3a04, 0x0024, 0x3000, /*  148 */
-		0x4024, 0x6182, 0x0024, 0x0006, 0x0890, 0x2800, 0x2fd8, 0x0006, /*  150 */
-		0x0301, 0x3a00, 0x4024, 0x0000, 0x00c3, 0x3004, 0x0024, 0x3013, /*  158 */
-		0x0024, 0x3000, 0x4024, 0x0006, 0x12d0, 0x3800, 0x4024, 0x0030, /*  160 */
-		0x0310, 0xf000, 0x0001, 0x6236, 0x0024, 0x001f, 0xffc3, 0x2800, /*  168 */
-		0x3395, 0x0000, 0x0024, 0x0000, 0x0203, 0xa132, 0x0024, 0x001f, /*  170 */
-		0xffc3, 0xb136, 0x0024, 0x6306, 0x0024, 0x0000, 0x0024, 0x2800, /*  178 */
-		0x3611, 0x0000, 0x0024, 0x0020, 0x0003, 0xb132, 0x0024, 0x0000, /*  180 */
-		0x0024, 0x2800, 0x3a85, 0x0000, 0x0024, 0x0000, 0x0081, 0xb212, /*  188 */
-		0x0024, 0x0000, 0x0024, 0x2800, 0x3a05, 0x0000, 0x0024, 0x6892, /*  190 */
-		0x0024, 0xb212, 0x0024, 0x0000, 0x0005, 0x2800, 0x3c55, 0x0030, /*  198 */
-		0x0310, 0x0000, 0x3fc1, 0x3000, 0x8024, 0xb214, 0x0024, 0x003f, /*  1a0 */
-		0xc001, 0xb010, 0x0024, 0xc200, 0x0024, 0x0030, 0x0310, 0x3800, /*  1a8 */
-		0x0024, 0x36f4, 0x1812, 0x36f1, 0x1805, 0x36f0, 0x5803, 0x2000, /*  1b0 */
-		0x0000, 0x0000, 0x0024, 0x0030, 0x0310, 0x0000, 0x0005, 0x003f, /*  1b8 */
-		0xc001, 0x4088, 0x0002, 0xb214, 0x0024, 0x1fff, 0xfe01, 0xae12, /*  1c0 */
-		0x0024, 0x2800, 0x3a00, 0xc200, 0x0024, 0x2800, 0x28c0, 0x3800, /*  1c8 */
-		0x0024, 0x0007, 0x0001, 0x80fa, 0x0006, 0x00fe, 0x3e12, 0x0024, /*  1d0 */
-		0x3e05, 0xb814, 0x3615, 0x0024, 0x3e00, 0x3841, 0x3e00, 0xb843, /*  1d8 */
-		0x3e01, 0x3845, 0x3e04, 0x3851, 0x0030, 0x10d0, 0x3e04, 0x8024, /*  1e0 */
-		0x3010, 0x0024, 0x3000, 0x8024, 0x0006, 0x1190, 0x3000, 0x4024, /*  1e8 */
-		0x6182, 0x0024, 0x0000, 0x0024, 0x2800, 0x5dd5, 0x0000, 0x0024, /*  1f0 */
-		0x0030, 0x03d0, 0x0000, 0x00c1, 0x3000, 0xc024, 0xb318, 0x0024, /*  1f8 */
-		0x6896, 0x0024, 0x6436, 0x0024, 0x0020, 0x0003, 0x2800, 0x59c5, /*  200 */
-		0x0000, 0x0024, 0x0006, 0x1150, 0x3000, 0x4024, 0x6136, 0x0024, /*  208 */
-		0x0000, 0x0024, 0x2800, 0x4741, 0x0000, 0x0024, 0x0000, 0x0803, /*  210 */
-		0x4132, 0x0024, 0x3800, 0x4024, 0x0006, 0x0190, 0x0006, 0xf011, /*  218 */
-		0x2900, 0xb500, 0x3613, 0x0024, 0x0006, 0xf011, 0x0006, 0x1152, /*  220 */
-		0x0006, 0x0250, 0x4082, 0x0800, 0xfe82, 0x184c, 0x1fff, 0xfc41, /*  228 */
-		0x48ba, 0x0024, 0xae1a, 0x0024, 0x2900, 0xb500, 0x4280, 0x4103, /*  230 */
-		0x0006, 0x1110, 0x4084, 0x0800, 0xfe84, 0x0002, 0x48ba, 0x0024, /*  238 */
-		0xae12, 0x0024, 0xf400, 0x4001, 0x0000, 0x0180, 0x6200, 0x0024, /*  240 */
-		0x0000, 0x0080, 0x2800, 0x5241, 0x4200, 0x0024, 0x3800, 0x0024, /*  248 */
-		0x0006, 0x1090, 0x3004, 0x8024, 0xf400, 0x4491, 0x3113, 0x0024, /*  250 */
-		0x3804, 0x4024, 0x3a00, 0xc024, 0x3004, 0x8024, 0xf400, 0x4491, /*  258 */
-		0x3113, 0x0024, 0x3804, 0x4024, 0x3a00, 0x4024, 0x0006, 0x1081, /*  260 */
-		0x3000, 0x0024, 0x6012, 0x0024, 0x0006, 0x0f00, 0x2800, 0x5248, /*  268 */
-		0x0000, 0x0024, 0x3800, 0x0024, 0x0030, 0x0010, 0x0000, 0x0080, /*  270 */
-		0x3000, 0x4024, 0x0030, 0x0710, 0xb104, 0x0024, 0x0000, 0x0001, /*  278 */
-		0x3800, 0x4024, 0x0006, 0x08d0, 0x3001, 0x0024, 0x0006, 0x0910, /*  280 */
-		0x3000, 0x4024, 0x6100, 0x0024, 0x6042, 0x0024, 0x0030, 0x06d0, /*  288 */
-		0x2800, 0x5711, 0xb880, 0x0024, 0x2900, 0x21c0, 0x4380, 0x184c, /*  290 */
-		0xb880, 0x0024, 0x3800, 0x0024, 0x36f4, 0x8024, 0x36f4, 0x1811, /*  298 */
-		0x36f1, 0x1805, 0x36f0, 0x9803, 0x36f0, 0x1801, 0x3405, 0x9014, /*  2a0 */
-		0x36f3, 0x0024, 0x36f2, 0x0024, 0x2000, 0x0000, 0x0000, 0x0024, /*  2a8 */
-		0x0006, 0x1152, 0x0000, 0x0804, 0x3200, 0xc024, 0x6346, 0x0024, /*  2b0 */
-		0x6386, 0x2803, 0x0000, 0x0024, 0x2800, 0x4755, 0x0000, 0x0024, /*  2b8 */
-		0x3800, 0x4024, 0x0030, 0x0690, 0x0000, 0x0081, 0xb882, 0x22c1, /*  2c0 */
-		0x3800, 0x4024, 0x0030, 0x0590, 0x2800, 0x4740, 0x3800, 0x4024, /*  2c8 */
-		0x2800, 0x5700, 0x4190, 0x0024, 0x0007, 0x0001, 0x8179, 0x0006, /*  2d0 */
-		0x00a6, 0x3e12, 0x0024, 0x3e05, 0xb814, 0x3625, 0x0024, 0x3e00, /*  2d8 */
-		0x3841, 0x3e00, 0xb843, 0x3e04, 0x3851, 0x0006, 0x1110, 0x3e04, /*  2e0 */
-		0xb813, 0x3000, 0x0024, 0x6080, 0x0024, 0x0006, 0x11d2, 0x2800, /*  2e8 */
-		0x70c5, 0x0000, 0x0081, 0x6010, 0x984c, 0x3800, 0x0024, 0x0006, /*  2f0 */
-		0x10d0, 0x3200, 0x0024, 0xf100, 0x0011, 0xf100, 0x0024, 0xf102, /*  2f8 */
-		0x0400, 0x0006, 0x1311, 0x2900, 0x0400, 0x3100, 0x8024, 0x0030, /*  300 */
-		0x1293, 0x3413, 0x184c, 0x3c04, 0x4024, 0x3b00, 0x0024, 0x3004, /*  308 */
-		0xc024, 0xf400, 0x44d1, 0x3113, 0x0024, 0x3804, 0x4024, 0x3310, /*  310 */
-		0x0024, 0x3a00, 0x0024, 0x0006, 0x1212, 0x3200, 0x0024, 0xf100, /*  318 */
-		0x13d1, 0xf100, 0x0402, 0x2900, 0x0400, 0xf102, 0x0c00, 0x0030, /*  320 */
-		0x12d1, 0x0006, 0x1081, 0x3900, 0x0024, 0x3004, 0xc024, 0xf400, /*  328 */
-		0x44d1, 0x3113, 0x0024, 0x3804, 0x4024, 0x3300, 0x0024, 0x3a00, /*  330 */
-		0x0024, 0xf400, 0x4440, 0x6010, 0x0024, 0x1fee, 0xe002, 0x2800, /*  338 */
-		0x6bc8, 0x0006, 0x0f00, 0x3800, 0x0024, 0x0006, 0x0010, 0xb886, /*  340 */
-		0x0040, 0x30f0, 0x4024, 0x6c92, 0x40c3, 0x3810, 0x0024, 0xb182, /*  348 */
-		0x23c1, 0x0006, 0x0950, 0x3000, 0x0024, 0x6090, 0x0024, 0x6cd2, /*  350 */
-		0x2000, 0x0000, 0x0000, 0x2800, 0x70c8, 0x0000, 0x0024, 0x3800, /*  358 */
-		0x0024, 0x0000, 0x0210, 0x3010, 0x0024, 0x30f0, 0x4024, 0x6c92, /*  360 */
-		0x0024, 0x3810, 0x0024, 0x38f0, 0x4024, 0x36f4, 0x9813, 0x36f4, /*  368 */
-		0x1811, 0x36f0, 0x9803, 0x36f0, 0x1801, 0x3405, 0x9014, 0x36f3, /*  370 */
-		0x0024, 0x36f2, 0x0024, 0x2000, 0x0000, 0x0000, 0x0024, 0x0007, /*  378 */
-		0x0001, 0x81cc, 0x0006, 0x00f4, 0x3e00, 0x3841, 0x0000, 0x0201, /*  380 */
-		0x3e00, 0xb843, 0x3e01, 0x3845, 0x3e04, 0x3812, 0x0030, 0x0410, /*  388 */
-		0x3000, 0x0024, 0x6012, 0x0024, 0x0006, 0x08d0, 0x2800, 0x8045, /*  390 */
-		0x0000, 0x0181, 0x6012, 0x0024, 0x0006, 0x1250, 0x2800, 0x7e45, /*  398 */
-		0x0000, 0x05c1, 0x6012, 0x0024, 0x0030, 0x01d0, 0x2800, 0x7c45, /*  3a0 */
-		0x0000, 0x0581, 0x6010, 0x03cc, 0x0000, 0x0024, 0x2800, 0x7a95, /*  3a8 */
-		0x0000, 0x0024, 0x3000, 0x8024, 0x0006, 0x1250, 0x3000, 0x0024, /*  3b0 */
-		0x6092, 0x0024, 0x3800, 0x4024, 0xf400, 0x4010, 0x3800, 0x8024, /*  3b8 */
-		0x36f4, 0x1812, 0x36f1, 0x1805, 0x36f0, 0x9803, 0x36f0, 0x1801, /*  3c0 */
-		0x2000, 0x0000, 0x0000, 0x0024, 0x0030, 0x01d0, 0x3000, 0x0024, /*  3c8 */
-		0x0006, 0x1250, 0x3800, 0x0024, 0xf400, 0x4010, 0x3000, 0x0024, /*  3d0 */
-		0x0030, 0x0190, 0x2800, 0x7a80, 0x3800, 0x0024, 0x3000, 0x0024, /*  3d8 */
-		0x6090, 0x0024, 0x3800, 0x0024, 0xf400, 0x4010, 0x3000, 0x0024, /*  3e0 */
-		0x0030, 0x0190, 0x2800, 0x7a80, 0x3800, 0x0024, 0x3000, 0x0024, /*  3e8 */
-		0x6080, 0x0024, 0x0000, 0x0024, 0x2800, 0x8515, 0x0000, 0x0024, /*  3f0 */
-		0x0006, 0x1350, 0x0000, 0x0082, 0x0030, 0x0352, 0xb886, 0x0040, /*  3f8 */
-		0x30f0, 0x4024, 0x4cd2, 0x0024, 0x3810, 0x0024, 0x38f0, 0x4024, /*  400 */
-		0x3a00, 0x0024, 0x3010, 0x0024, 0x30f0, 0x4024, 0x0030, 0x0390, /*  408 */
-		0x2800, 0x7a80, 0x4180, 0x2001, 0x4090, 0x0024, 0x3800, 0x0024, /*  410 */
-		0x0030, 0x0250, 0x3800, 0x0024, 0x0006, 0x1290, 0x3000, 0x0024, /*  418 */
-		0x6090, 0x0024, 0x3800, 0x0024, 0x0006, 0x0850, 0x3004, 0x8024, /*  420 */
-		0x3223, 0x0024, 0x32e0, 0x4024, 0x6100, 0x0024, 0x0000, 0x0024, /*  428 */
-		0x2800, 0x8c81, 0x0000, 0x0024, 0x3233, 0x0024, 0x3804, 0x8024, /*  430 */
-		0x3200, 0x0024, 0x6080, 0x0024, 0x0006, 0x0300, 0x2800, 0x8b18, /*  438 */
-		0x0000, 0x0024, 0x3800, 0x0024, 0x0006, 0x0850, 0x3004, 0x0024, /*  440 */
-		0x3013, 0x0024, 0x3000, 0x0024, 0x0006, 0x1290, 0x3800, 0x0024, /*  448 */
-		0x0006, 0x0850, 0x3004, 0x0024, 0x3000, 0x0024, 0x0006, 0x1290, /*  450 */
-		0x6080, 0x0024, 0x3000, 0x0024, 0x2800, 0x9115, 0xf400, 0x4010, /*  458 */
-		0x3000, 0x0024, 0x0000, 0x0201, 0x0000, 0x0005, 0x0030, 0x0210, /*  460 */
-		0xa014, 0x4004, 0x1fff, 0xfe01, 0xae12, 0x0024, 0xc200, 0x0024, /*  468 */
-		0x2800, 0x8180, 0x3800, 0x0024, 0x2800, 0x8ec0, 0x3009, 0x0000, /*  470 */
-		0x0007, 0x0001, 0x8246, 0x0006, 0x0104, 0x0030, 0x1092, 0x0007, /*  478 */
-		0x9250, 0x003f, 0xfc42, 0xb880, 0x184c, 0x3e12, 0x0024, 0x3800, /*  480 */
-		0x0024, 0x0030, 0x0290, 0x38f0, 0x0024, 0x3800, 0x0024, 0x0030, /*  488 */
-		0x0050, 0x3000, 0x4024, 0xb122, 0x0024, 0x6894, 0x2001, 0x0000, /*  490 */
-		0x0141, 0x3a70, 0x4024, 0x0004, 0x1fc1, 0x3a00, 0x4024, 0x0030, /*  498 */
-		0x00d2, 0x0030, 0x0001, 0x3a00, 0x4024, 0x0030, 0x0552, 0x3a10, /*  4a0 */
-		0x0024, 0x3a00, 0x0024, 0x3000, 0x4024, 0xc122, 0x0024, 0x3800, /*  4a8 */
-		0x4024, 0x0030, 0x05d0, 0x0000, 0x03c1, 0x3820, 0x4024, 0x3800, /*  4b0 */
-		0x0024, 0x0000, 0x0310, 0x3010, 0x0024, 0x30f0, 0x4024, 0xf2c2, /*  4b8 */
-		0x0024, 0x3810, 0x0024, 0x0000, 0x3fc0, 0x38f0, 0x4024, 0x0030, /*  4c0 */
-		0x02d0, 0x3000, 0x4024, 0x2912, 0x1400, 0xb104, 0x0024, 0x0006, /*  4c8 */
-		0x1312, 0x6802, 0x0024, 0x000d, 0xac00, 0x6012, 0x2801, 0x0000, /*  4d0 */
-		0x0024, 0x2800, 0x9dc1, 0x0000, 0x0024, 0x3a00, 0x0024, 0x2909, /*  4d8 */
-		0x1b40, 0x3613, 0x0024, 0x0000, 0x0084, 0x0000, 0x1905, 0x2908, /*  4e0 */
-		0xbe80, 0x3613, 0x0024, 0x0000, 0x0000, 0x0006, 0x0302, 0x4002, /*  4e8 */
-		0x0024, 0x4012, 0x0024, 0x4212, 0x0024, 0xf400, 0x4050, 0x3000, /*  4f0 */
-		0x4024, 0x6182, 0x0024, 0x0006, 0x0350, 0x2800, 0xa6c8, 0x0000, /*  4f8 */
-		0x0024, 0x4002, 0x0024, 0x4014, 0x0024, 0x0006, 0x0301, 0x4124, /*  500 */
-		0x0024, 0x0000, 0x0081, 0x4212, 0x0024, 0x4002, 0x4050, 0x4014, /*  508 */
-		0x0003, 0x0006, 0x0301, 0x4122, 0x0024, 0x6192, 0x0024, 0x6090, /*  510 */
-		0x4050, 0x3000, 0x4024, 0x0006, 0x0910, 0x6312, 0x0024, 0x6194, /*  518 */
-		0x0001, 0x4122, 0x0024, 0x2800, 0x9f80, 0x3800, 0x4024, 0x0006, /*  520 */
-		0x12d2, 0x0006, 0x0991, 0x3000, 0x0024, 0x0006, 0x1290, 0x3a00, /*  528 */
-		0x0024, 0x3800, 0x0024, 0xf400, 0x4010, 0x2900, 0xb200, 0x0000, /*  530 */
-		0x0580, 0x0030, 0x0210, 0x0014, 0x9240, 0x003f, 0xf502, 0x003f, /*  538 */
-		0xffc3, 0x3800, 0x0024, 0x0000, 0x0580, 0x0006, 0x1350, 0x3200, /*  540 */
-		0x4024, 0x4102, 0x0024, 0x3a00, 0x4024, 0x3810, 0x8024, 0x38f0, /*  548 */
-		0xc024, 0x0006, 0x08d0, 0x3800, 0x0024, 0x0030, 0x0690, 0x0000, /*  550 */
-		0x8280, 0xb880, 0x2080, 0x3800, 0x0024, 0x6890, 0x2000, 0x0030, /*  558 */
-		0x0490, 0x3800, 0x0024, 0x0030, 0x0010, 0x0000, 0x0100, 0x3000, /*  560 */
-		0x584c, 0xb100, 0x0024, 0x0000, 0x0024, 0x2800, 0xb185, 0x0000, /*  568 */
-		0x0024, 0x003f, 0xfec1, 0x3000, 0x1bcc, 0xb010, 0x0024, 0x2908, /*  570 */
-		0x0b80, 0x3800, 0x0024, 0x3613, 0x0024, 0x2910, 0x0180, 0x0000, /*  578 */
-		0xae48, 0x0007, 0x0001, 0x1806, 0x0006, 0x8007, 0x0000, 0x0006, /*  580 */
-		0x002f, 0x0010, 0x17ff, 0x0000, 0x1a00, 0x1dff, 0x0000, 0x1f00, /*  588 */
-		0x3fff, 0x0001, 0x0000, 0x17ff, 0x0001, 0x1c00, 0x3fff, 0x0001, /*  590 */
-		0xe000, 0xfffd, 0xffff, 0x0000, 0x0000, 0x180c, 0x180c, 0x0000, /*  598 */
-		0x0000, 0x0000, 0x4952, 0x4646, 0xffff, 0xffff, 0x4157, 0x4556, /*  5a0 */
-		0x6d66, 0x2074, 0x0010, 0x0000, 0x0001, 0x0001, 0xbb80, 0x0000, /*  5a8 */
-		0x7700, 0x0001, 0x0002, 0x0010, 0x6164, 0x6174, 0xffff, 0xffff, /*  5b0 */
-		0x0006, 0x8006, 0x0000, 0x0006, 0x0005, 0x183c, 0x183c, 0x0000, /*  5b8 */
-		0x0020, 0x0040, 0x0006, 0x8003, 0x0000, 0x0007, 0x0001, 0x5bc0, /*  5c0 */
-		0x0006, 0x0009, 0x801c, 0x7fe4, 0x8039, 0x804e, 0x7fb2, 0x809d, /*  5c8 */
-		0x809c, 0x7f64, 0x8139, 0x0007, 0x0001, 0x82c8, 0x0006, 0x0018, /*  5d0 */
-		0x4080, 0x184c, 0x3e13, 0x780f, 0x2800, 0xb405, 0x4090, 0x380e, /*  5d8 */
-		0x2400, 0xb3c0, 0xf400, 0x4417, 0x3110, 0x0024, 0x3f10, 0x0024, /*  5e0 */
-		0x36f3, 0x8024, 0x36f3, 0x580f, 0x2000, 0x0000, 0x0000, 0x0024, /*  5e8 */
-		0x0007, 0x0001, 0x82d4, 0x0006, 0x002a, 0x3e11, 0xb807, 0x3009, /*  5f0 */
-		0x384a, 0x3e11, 0x3805, 0x3e10, 0xb803, 0x3e00, 0x4442, 0x0001, /*  5f8 */
-		0x800a, 0xbf8e, 0x8443, 0xfe06, 0x0045, 0x3011, 0x0401, 0x545e, /*  600 */
-		0x0385, 0x525e, 0x2040, 0x72ce, 0x1bc1, 0x48ba, 0x9803, 0x4588, /*  608 */
-		0x4885, 0x6fee, 0x1bc2, 0x4ffe, 0x9805, 0xf6fe, 0x1bc4, 0xf7f0, /*  610 */
-		0x2046, 0x3801, 0xdbca, 0x2000, 0x0000, 0x36f1, 0x9807,
-	};
-	const uint16_t patch_size = 1567;
-	DEBUG("Patching...\n");
-
-	_spi->select_vs1053_xcs();
-	SPI.beginTransaction(*_spi_settings);
-	
-	for (int i=0; i<patch_size; i++) {
-		DEBUG("  %d\n", i);
-		unsigned short addr, n, val;
-		addr = patch_data[i++];
-		n = patch_data[i++];
-		SPI.transfer(CMD_WRITE);
-		SPI.transfer(addr & 0XFF);
-		if (n & 0x8000U) { /* RLE run, replicate n samples */
-			n &= 0x7FFF;
-			val = patch_data[i++];
-			while (n--) {
-				SPI.transfer(val >> 8);
-				SPI.transfer(val & 0xFF);
-				_wait();
-			}
-		} else {           /* Copy run, copy n samples */
-			while (n--) {
-				val = patch_data[i++];
-				SPI.transfer(val >> 8);
-				SPI.transfer(val & 0xFF);
-				_wait();
-			}
-		}
-	}
-
-	SPI.endTransaction();
-	_spi->select_vs1053_xcs(false);
-
-	DEBUG("Patch sent.\n");
-}
-
-void Player::_write_data(uint8_t* buffer) {
-	_spi->select_vs1053_xdcs();
-	SPI.beginTransaction(*_spi_settings);
-	for (uint i=0; i<sizeof(_buffer); i++) {
-		SPI.transfer(_buffer[i]);
-	}
-	SPI.endTransaction();
-	_spi->select_vs1053_xdcs(false);
-}
-
-uint16_t Player::_read_wram(uint16_t address) {
-	DEBUG("Reading WRAM address 0x%04X...\n", address);
-	_write_control_register(SCI_WRAMADDR, address);
-	uint16_t r1 = _read_control_register(SCI_WRAM);
-	_write_control_register(SCI_WRAMADDR, address);
-	uint16_t r2 = _read_control_register(SCI_WRAM);
-	if (r1 == r2) return r1;
-	DEBUG("Reading WRAM resulted in different values: 0x%04X and 0x%04X.\n", r1, r2);
-	_write_control_register(SCI_WRAMADDR, address);
-	r1 = _read_control_register(SCI_WRAM);
-	if (r1 == r2) return r1;
-	DEBUG("Reading WRAM resulted in different values: 0x%04X and 0x%04X.\n", r1, r2);
-	_write_control_register(SCI_WRAMADDR, address);
-	r2 = _read_control_register(SCI_WRAM);
-	if (r1 == r2) return r1;
-	DEBUG("Reading WRAM resulted in different values: 0x%04X and 0x%04X.\n", r1, r2);
-	DEBUG("Returning last value (0x%04X)...\n", r2);
-	return r2;
-}
-
-int8_t Player::_get_endbyte() {
-	int8_t endbyte = _read_wram(ADDR_ENDBYTE) & 0xFF;
-	DEBUG("Endbyte is 0x%02X.\n", endbyte);
-	return endbyte;
-}
-
-
-void Player::set_volume(uint8_t vol, bool save) {
-	if (save) {
-		_volume = vol;
-	}
-	INFO("Setting volume to %d\n", vol);
-	vol = 0xFF - vol;
-	uint16_t value = (vol<<8)|vol;
-	DEBUG("Setting volume register to 0x%04X\n", value);
-	_write_control_register(SCI_VOL, value);
-}
-
-void Player::vol_up() {
-	if (!is_playing()) return;
-	uint16_t vol = _volume + VOLUME_STEP;
-	if (vol > VOLUME_MAX) vol=VOLUME_MAX;
-	set_volume(vol);
-}
-
-void Player::vol_down() {
-	if (!is_playing()) return;
-	int16_t vol = _volume - VOLUME_STEP;
-	if (vol < VOLUME_MIN) vol=VOLUME_MIN;
-	set_volume(vol);
-}
-
-void Player::_mute() {
-	INFO("Muting.\n");
-	_speaker_off();
-	set_volume(1, false);
-}
-
-void Player::_unmute() {
-	INFO("Unmuting.\n");
-	set_volume(_volume, false);
-	_speaker_on();
-}
-
-void Player::track_next() {
-	if (_state != playing) return;
-	if (!_current_playlist->has_track_next()) {
-		return;
-	}
-	stop();
-	_current_playlist->track_next();
-	play();
-}
-
-void Player::track_prev() {
-	if (_state != playing) return;
-	if (_current_play_position > 100000) {
-		stop();
-		_current_playlist->track_restart();
-		play();
-	} else {
-		if (!_current_playlist->has_track_prev()) {
-			return;
-		}
-		stop();
-		_current_playlist->track_prev();
-		play();
-	}
-}
-
-void Player::set_track(uint8_t id) {
-	stop();
-	_current_playlist->set_track(id);
-	play();
-}
-
-bool Player::is_playing() {
-	return _state == playing;
-}
-
-bool Player::play(Playlist* p) {
-	_current_playlist = p;
-	return play();
-}
-
-bool Player::play() {
-	if (_state == sleeping || _state == recording) _wakeup();
-	if (_state != idle) return false;
-	if (_current_playlist == NULL) return false;
-	if (_current_playlist->get_file_count()==0) return false;
-	_speaker_on();
-	_current_playlist->start();
-	String file;
-	if (!_current_playlist->get_current_file(&file)) {
-		return false;
-	}
-	uint32_t position = _current_playlist->get_position();
-	_state = playing;
-	_play_file(file, position);
-	_controller->send_player_status();
-	return true;
-}
-
-void Player::_play_file(String file, uint32_t file_offset) {
-	INFO("play_file('%s', %d)\n", file.c_str(), file_offset);
-	_spi->select_sd();
-	if (file.startsWith("/")) {
-		_file = new SDDataSource(file);
-	} else if (file.startsWith("http")) {
-		_file = new HTTPSDataSource(file);
-	} else {
-		return;
-	}
-	_file_size = _file->size();
-	_spi->select_sd(false);
-	if (!_file || !_file->usable()) {
-		DEBUG("Could not open file %s", file.c_str());
-		return;
-	}
-
-	DEBUG("Resetting SCI_DECODE_TIME...\n");
-	_write_control_register(SCI_DECODE_TIME, 0);
-	DEBUG("Resetting SS_DO_NOT_JUMP...\n");
-	_write_control_register(SCI_STATUS, _read_control_register(SCI_STATUS) & ~SS_DO_NOT_JUMP);
-	delay(100);
-
-	_spi->select_sd();
-	if (file_offset == 0) {
-		_file->skip_id3_tag();
-	}
-	_refills = 0;
-	_current_play_position = _file->position();
-	_spi->select_sd(false);
-	_skip_to = file_offset;
-	if (_skip_to>0) _mute();
-	else _speaker_on();
-	INFO("Now playing.\n");
-	_controller->send_player_status();
-}
-
-void Player::_flush(uint count, int8_t byte) {
-	_spi->select_vs1053_xdcs();
-	SPI.beginTransaction(*_spi_settings);
-	for(uint i=0; i<count; i++) {
-		_wait();
-		SPI.transfer(byte);
-	}
-	SPI.endTransaction();
-	_spi->select_vs1053_xdcs(false);
-}
-
-void Player::_finish_playing() {
-	uint8_t endbyte = _get_endbyte();
-	_flush(2052, endbyte);
-	_write_control_register(SCI_MODE, _read_control_register(SCI_MODE) | SM_CANCEL);
-	for (int i=0; i<64; i++) {
-		_flush(32, endbyte);
-		uint16_t mode = _read_control_register(SCI_MODE);
-		if ((mode & SM_CANCEL) == 0) return;
-	}
-	// If we reached this, the Chip didn't stop. That should not happen.
-	// (That's written in the manual.)
-	// Reset the chip.
-	init();
-}
-
-void Player::stop(bool turn_speaker_off) {
-	if (_state != playing) return;
-	INFO("Stopping...\n");
-	_current_playlist->set_position(_current_play_position);
-	_controller->pm->persist(_current_playlist);
-	
-	_state = stopping;
-	_stop_delay = 0;
-	_write_control_register(SCI_MODE, _read_control_register(SCI_MODE) | SM_CANCEL);
-	uint8_t endbyte = _get_endbyte();
-	while (true) {
-		_refill();
-		uint16_t mode = _read_control_register(SCI_MODE);
-		if ((mode & SM_CANCEL) == 0) {
-			_flush(2052, endbyte);
-			_finish_stopping(turn_speaker_off);
-			break;
-		} else if (_stop_delay > 2048) {
-			init();
-			break;
-		}
-		_stop_delay++;
-	}
-}
-
-void Player::_finish_stopping(bool turn_speaker_off) {
-	if (turn_speaker_off) _speaker_off();
-	_state = idle;
-	_stopped_at = millis();
-	if (_file) {
-		_file->close();
-		delete _file;
-	}
-	_current_play_position = 0;
-	_file_size = 0;
-	INFO("Stopped.\n");
-	_controller->send_player_status();
-}
-
-void Player::_refill() {
-	_spi->select_sd();
-	_refills++;
-	if (_refills % 1000 == 0) DEBUG(".");
-	uint8_t result = _file->read(_buffer, sizeof(_buffer));
-	_spi->select_sd(false);
-	if (result == 0) {
-		// File is over.
-		DEBUG("EOF reached.\n");
-		_skip_to = 0;
-		_finish_playing();
-		_finish_stopping(false);
-		if (_current_playlist->has_track_next()) {
-			_current_playlist->track_next();
-			play();
-		} else {
-			_current_playlist->reset();
-			_controller->send_player_status();
-		}
-		
-		return;
-	}
-	_current_play_position+=result;
-	_write_data(_buffer);
-
-	if (_skip_to > 0) {
-		if (_skip_to > _file->position()) {
-			uint16_t status = _read_control_register(SCI_STATUS);
-			if ((status & SS_DO_NOT_JUMP) == 0) {
-				DEBUG("Skipping to %d.\n", _skip_to);
-				_flush(2048, _get_endbyte());
-				_spi->select_sd();
-				_file->seek(_skip_to);
-				_spi->select_sd(false);
-				_skip_to = 0;
-				_unmute();
-				_controller->send_position();
-			}
-		} else {
-			_skip_to = 0;
-			_unmute();
-		}
-	}
-}
-
-bool Player::_refill_needed() {
-	return _state==playing || _state==stopping;
-}
-
-bool Player::loop() {
-	if (PIN_VS1053_DREQ() && _refill_needed()) {
-		_refill();
-		return true;
-	}
-	
-	if (_state == recording) {
-		DEBUG("r");
-		uint16_t samples_available = _read_control_register(SCI_HDAT1, false);
-		uint16_t vu_value = _read_control_register(SCI_AICTRL0, false);
-		DEBUG("Samples available: %4d, VU meter: 0x%04X\n", samples_available, vu_value);
-		if (samples_available >= 500) {
-			unsigned long sum = 0;
-			for (int i=0; i<500; i++) {
-				uint16_t sample = _read_control_register(SCI_HDAT0, false);
-				sum += sample * sample;
-			}
-			double result = sqrt(sum / 500);
-			DEBUG("Loudness: %f", result);
-		}
-	}
-
-	if (_state == idle && _stopped_at < millis() - VS1053_SLEEP_DELAY) {
-		_sleep();
-		//_record();
-	}
-	return false;
-}
-
-String Player::json() {
-	DynamicJsonDocument json(10240);
-	json["_type"] = "player";
-	json["playing"] = is_playing();
-	if (_current_playlist) {
-		JsonObject playlist = json.createNestedObject("playlist");
-		_current_playlist->json(playlist);
-	} else {
-		json["playlist"] = nullptr;
-	}
-	JsonObject volume = json.createNestedObject("volume");
-	volume["current"] = _volume;
-	volume["min"] = VOLUME_MIN;
-	volume["max"] = VOLUME_MAX;
-	volume["step"] = VOLUME_STEP;
-	return json.as<String>();
-}
-
-String Player::position_json() {
-	if (!is_playing()) return "null";
-	DynamicJsonDocument json(200);
-	json["_type"] = "position";
-	json["position"] = _current_play_position;
-	json["file_size"] = _file_size;
-	return json.as<String>();
-}
diff --git a/src/playlist.cpp b/src/playlist.cpp
index 0428cce..d59c75e 100644
--- a/src/playlist.cpp
+++ b/src/playlist.cpp
@@ -1,399 +1,9 @@
-#include <playlist.h>
-#include "spi_master.h"
-#include "config.h"
-#include <SD.h>
-#include <algorithm>
-#include <ArduinoJson.h>
-#include <TinyXML.h>
-#include "main.h"
+#include "playlist.h"
 
-Playlist::Playlist(String path) {
-	_path = path;
-	if (path.startsWith("/")) {
-		persistence = PERSIST_TEMPORARY;
-		_add_path(path);
-	} else if (path.startsWith("http")) {
-		_examine_http_url(path);
-	}
-	if (_title.length()==0) _title=path;
+void Playlist::add_file(String filename) {
+	files.push_back(filename);
 }
 
-void Playlist::_add_path(String path) {
-	SPIMaster::select_sd();
-	TRACE("Examining folder %s...\n", path.c_str());
-	if (!path.startsWith("/")) path = String("/") + path;
-	if (!SD.exists(path)) {
-		DEBUG("Could not open path '%s'.\n", path.c_str());
-		SPIMaster::select_sd(false);
-		return;
-	}
-	_title = path.substring(1);
-	int idx = _title.indexOf('/');
-	if (idx>0) {
-		_title.remove(idx);
-	}
-	File dir = SD.open(path);
-	File entry;
-	while (entry = dir.openNextFile()) {
-		String filename = entry.name();
-		filename = filename.substring(path.length() + 1);
-		String ext = filename.substring(filename.length() - 4);
-		if (!entry.isDirectory() &&
-			!filename.startsWith(".") &&
-			( ext.equals(".mp3") ||
-			  ext.equals(".ogg") ||
-			  ext.equals(".wma") ||
-			  ext.equals(".mp4") ||
-			  ext.equals(".mpa"))) {
-			TRACE("    Adding entry %s\n", entry.name());
-			String title = filename.substring(0, filename.length() - 4);
-			_files.push_back({.filename=entry.name(), .title=title, .id=String(_files.size())});
-			bool non_ascii_chars = false;
-			for(int i=0; i<filename.length(); i++) {
-				char c = filename.charAt(i);
-				if (c < 0x20 || c >= 0x7F) {
-					non_ascii_chars = true;
-					break;
-				}
-			}
-			if (non_ascii_chars) {
-				ERROR("WARNING: File '%s' contains non-ascii chars!\n", filename.c_str());
-			}
-		} else {
-			TRACE("  Ignoring entry %s\n", filename.c_str());
-		}
-		entry.close();
-	}
-	dir.close();
-	SPIMaster::select_sd(false);
-	std::sort(_files.begin(), _files.end());
-}
-
-void Playlist::_examine_http_url(String url) {
-	HTTPClientWrapper* http = new HTTPClientWrapper();
-	if (!http->get(url)) {
-		DEBUG("Could not GET %s.\n", url.c_str());
-		return;
-	}
-	String ct = http->getContentType();
-	DEBUG("Content-Type is %s.\n", ct.c_str());
-	if (ct.startsWith("audio/x-mpegurl")) {
-		_parse_m3u(http);
-	} else if (ct.startsWith("audio/")) {
-		persistence = PERSIST_NONE;
-		_files.push_back({.filename=url, .title=url, .id="none"});
-	} else if (ct.startsWith("application/rss+xml")) {
-		persistence = PERSIST_PERMANENTLY;
-		_parse_rss(http);
-	} else if (ct.startsWith("application/pls+xml")) {
-		persistence = PERSIST_PERMANENTLY;
-		_parse_pls(http);
-	} else {
-		ERROR("Unknown content type %s.\n", ct.c_str());
-	}
-	http->close();
-	delete http;
-}
-
-std::vector<PlaylistEntry>* xml_files_ptr = NULL;
-String xml_last_tag = "";
-String xml_title = "";
-String xml_album_title = "";
-String xml_url = "";
-String xml_enclosure_url = "";
-String xml_guid = "";
-bool xml_enclosure_is_audio = false;
-
-void xmlcb(uint8_t status, char* tagName, uint16_t tagLen, char* data, uint16_t dataLen) {
-	String tag(tagName);
-	if (status & STATUS_START_TAG) xml_last_tag = tag;
-
-	if (trace_enabled) {
-		if (status & STATUS_START_TAG) {
-			TRACE("Start of tag: %s\n", tagName);
-		} else if (status & STATUS_END_TAG) {
-			TRACE("End of tag: %s\n", tagName);
-		}
-	}
-
-	if (tag.equals("/rss/channel/title") && (status & STATUS_TAG_TEXT)) {
-		xml_album_title = data;
-	} else if (tag.endsWith("/title") && (status & STATUS_TAG_TEXT)) {
-		xml_title = String(data);
-	} else if (tag.endsWith("/guid") && (status & STATUS_TAG_TEXT)) {
-		xml_guid = data;
-	//} else if (xml_last_tag.endsWith("/item/enclosure") && (status & STATUS_ATTR_TEXT)) {
-	//	DEBUG("tag: %s, data: %s\n", tag.c_str(), data);
-	} else if (xml_last_tag.endsWith("/enclosure") && tag.equals("type") && (status & STATUS_ATTR_TEXT) && String(data).indexOf("audio/")>=0) {
-		DEBUG("enclosure is audio\n");
-		xml_enclosure_is_audio = true;
-	} else if (xml_last_tag.endsWith("/enclosure") && tag.equals("url") && (status & STATUS_ATTR_TEXT)) {
-		DEBUG("found url\n");
-		xml_enclosure_url = String(data);
-	} else if (tag.endsWith("/enclosure") && (status & STATUS_END_TAG)) {
-		DEBUG("end of enclosure. xml_enclosure_is_audio: %d, xml_enclosure_url: %s\n", xml_enclosure_is_audio, xml_enclosure_url.c_str());
-		if (xml_enclosure_is_audio && xml_enclosure_url.length()>0) {
-			xml_url = xml_enclosure_url;
-		}
-		xml_enclosure_is_audio = false;
-		xml_enclosure_url = "";
-	} else if (tag.endsWith("/item") && (status & STATUS_END_TAG || status & STATUS_START_TAG)) {
-		if (xml_title.length()>0 && xml_url.length()>0) {
-			if (xml_files_ptr->size() > 20) return;
-			DEBUG("Adding playlist entry: '%s' => '%s'\n", xml_title.c_str(), xml_url.c_str());
-			xml_files_ptr->insert(xml_files_ptr->begin(), {.filename=xml_url, .title=xml_title, .id=xml_guid});
-		}
-		xml_title = "";
-		xml_url = "";
-		xml_guid = "";
-	}
-}
-
-void Playlist::_parse_rss(HTTPClientWrapper* http) {
-	DEBUG("RSS parser running.\n");
-	// http is already initialized
-	int i;
-	
-	TinyXML xml;
-	uint8_t* buffer = new uint8_t[150];
-	xml.init(buffer, 150, &xmlcb);
-	xml_files_ptr = &_files;
-	xml_title = "";
-	xml_album_title = "";
-	xml_url = "";
-	xml_enclosure_is_audio = false;
-	xml_enclosure_url = "";
-	while ((i = http->read()) >= 0) {
-		xml.processChar(i);
-	}
-	_current_track = _files.size()-1;
-	xml_files_ptr = NULL;
-	if (xml_album_title.length()>0) {
-		_title = xml_album_title;
-	}
-	xml_album_title = "";
-	delete buffer;		
-	// don't close http at the end
-	DEBUG("RSS parser finished.\n");
-}
-
-void Playlist::_parse_m3u(HTTPClientWrapper* http) {
-	// http is already initialized
-	String line = "";
-	String title = "";
-	int i;
-	do {
-		i = http->read();
-		char c = i;
-		if (i>=0 && c!='\r' && c!='\n') {
-			line += c;
-		} else {
-			if (line.equals("#EXTM3U")) {
-				// Do nothing
-			} else if (line.startsWith("#EXTINF")) {
-				int idx = line.indexOf(",");
-				if (idx>4) {
-					// Get the title
-					title = line.substring(idx+1);
-					if (_title.length()==0) _title=title;
-				}
-			} else if (line.startsWith("http")) {
-				if (title.length()==0) title = line;
-				_files.push_back({.filename=line, .title=title, .id="none"});
-				title = "";
-			}
-			line = "";
-		}
-	} while (i>=0);
-	// don't close http at the end
-}
-
-void Playlist::_parse_pls(HTTPClientWrapper* http) {
-	// http is already initialized
-	String line;
-	String title = "";
-	String url = "";
-	int last_index = -1;
-	int index;
-
-	while(true) {
-		line = http->readLine();
-		if (line.startsWith("Title")) {
-			uint8_t eq_idx = line.indexOf('=');
-			if (eq_idx==-1) continue;
-
-			index = line.substring(5, eq_idx-4).toInt();
-			title = line.substring(eq_idx+1);
-			if (index != last_index) {
-				url = "";
-				last_index = index;
-			}
-		} else if (line.startsWith("File")) {
-			uint8_t eq_idx = line.indexOf('=');
-			if (eq_idx==-1) continue;
-
-			index = line.substring(5, eq_idx-4).toInt();
-			url = line.substring(eq_idx+1);
-			if (index != last_index) {
-				title = "";
-				last_index = index;
-			}
-		}
-
-		if (title.length()>0 && url.length()>0) {
-			_files.push_back({.filename=url, .title=title, .id="none"});
-			last_index = -1;
-			title = "";
-			url = "";
-		}
-	}
-	// don't close http at the end
-}
-
-String Playlist::path() {
-	return _path;
-}
-
-uint16_t Playlist::get_file_count() {
-	return _files.size();
-}
-
-void Playlist::start() {
-	_started = true;
-}
-
-bool Playlist::has_track_prev() {
-	return _current_track > 0;
-}
-
-bool Playlist::has_track_next() {
-	return _current_track < _files.size()-1;
-}
-
-bool Playlist::track_prev() {
-	if (_current_track > 0) {
-		_current_track--;
-		_position = 0;
-		return true;
-	}
-	return false;
-}
-
-bool Playlist::track_next() {
-	if (_current_track < _files.size()-1) {
-		_current_track++;
-		_position = 0;
-		return true;
-	}
-	return false;
-}
-
-bool Playlist::set_track(uint8_t track) {
-	if (track < _files.size()) {
-		_current_track = track;
-		_position = 0;
-		return true;
-	}
-	return false;
-}
-
-void Playlist::set_track_by_id(String id) {
-	for (int i=0; i<_files.size(); i++) {
-		if (id.equals(_files[i].id)) {
-			set_track(i);
-			return;
-		}
-	}
-}
-
-void Playlist::track_restart() {
-	_position = 0;
-}
-
-void Playlist::shuffle(uint8_t random_offset) {
-	DEBUG("Shuffling the playlist with an offset of %d...\n", random_offset);
-	for (int i=random_offset; i<_files.size(); i++) {
-		int j = random(random_offset, _files.size()-1);
-		if (i!=j) {
-			TRACE("  Swapping elements %d and %d.\n", i, j);
-			PlaylistEntry temp = _files[i];
-			_files[i] = _files[j];
-			_files[j] = temp;
-		}
-	}
-	_shuffled = true;
-	TRACE("Done.\n");
-}
-
-void Playlist::advent_shuffle(uint8_t day) {
-	TRACE("advent_shuffle running...\n");
-	
-	// Not enough songs till the current day? Play all songs in the default order.
-	if (day > _files.size()) {
-		return;
-	}
-
-	// We are in the "different playlist every day" mode. So we don't persist it in order to not miss changes.
-	persistence = PERSIST_NONE;
-
-	
-	_files.insert(_files.begin(), _files[day - 1]);
-	_files.erase(_files.begin() + day, _files.end());
-}
-
-void Playlist::reset() {
-	std::sort(_files.begin(), _files.end());
-	_current_track = 0;
-	_position = 0;
-	_shuffled = false;
-	_started = false;
-}
-
-String Playlist::get_current_track_id() {
-	if (_current_track > _files.size()) {
-		return "";
-	}
-	return _files[_current_track].id;
-}
-
-bool Playlist::get_current_file(String* dst) {
-	if (_current_track > _files.size()) {
-		return false;
-	} else {
-		dst->concat(_files[_current_track].filename);
-		return true;
-	}
-}
-
-uint32_t Playlist::get_position() {
-	return _position;
-}
-
-void Playlist::set_position(uint32_t p) {
-	_position = p;
-}
-
-bool Playlist::is_fresh() {
-	return !_shuffled && !_started && _position==0 && _current_track==0;
-}
-
-void Playlist::dump() {
-	for (int i=0; i<_files.size(); i++) {
-		DEBUG("  %02d %2s %s\n", i+1, (i==_current_track) ? "->" : "", _files[i].filename.c_str());
-	}
-}
-
-void Playlist::json(JsonObject json) {
-	json["_type"] = "playlist";
-	json["title"] = _title;
-	JsonArray files = json.createNestedArray("files");
-	for (PlaylistEntry entry: _files) {
-		JsonObject o = files.createNestedObject();
-		o["filename"] = entry.filename;
-		o["title"] = entry.title;
-		o["id"] = entry.id;
-	}
-	json["current_track"] = _current_track;
-	json["has_track_next"] = has_track_next();
-	json["has_track_prev"] = has_track_prev();
-}
+void Playlist::sort() {
+	std::sort(files.begin(), files.end());
+}
\ No newline at end of file
diff --git a/src/playlist_manager.cpp b/src/playlist_manager.cpp
index 45e0b34..dc9f3da 100644
--- a/src/playlist_manager.cpp
+++ b/src/playlist_manager.cpp
@@ -1,33 +1,29 @@
 #include "playlist_manager.h"
-#include <SD.h>
 #include "spi_master.h"
-#include <ArduinoJson.h>
+#include <SD.h>
 
 PlaylistManager::PlaylistManager() {
-	scan_files();
-}
+	SPIMaster::enable_sd();
+	current_rfid_tag_id = String("");
 
-void PlaylistManager::scan_files() {
-	SPIMaster::select_sd();
-	std::vector<String> folders;
 	File root = SD.open("/");
-	File entry;
-	while (entry = root.openNextFile()) {
-		Serial.println(entry.name());
-		String foldername = entry.name();
-		if (foldername.startsWith("/.")) continue;
-		foldername.remove(foldername.length());
-		folders.push_back(foldername);
-		_check_for_special_chars(foldername);
-		entry.close();
+	while(File entry = root.openNextFile()) {
+		if (entry.isDirectory()) {
+			String filename("/");
+			filename.concat(entry.name());
+			if (!filename.startsWith("/.")) {
+				Serial.println(filename);
+				dirs.push_back(filename);
+			}
+		}
 	}
 
-	_map.clear();
-	if (!SD.exists("/_mapping.txt\n")) {
-		ERROR("WARNING: File /_mapping.txt not found.\n");
+	if (!SD.exists("/_mapping.txt")) {
+		Serial.println("WARNING: /_mapping.txt not found!");
 	} else {
+		map.clear();
 		File f = SD.open("/_mapping.txt");
-		DEBUG("Reading /_mapping.txt...\n");
+		Serial.println("  Reading /_mapping.txt...");
 		while (f.available()) {
 			char buffer[512];
 			size_t pos = f.readBytesUntil('\n', buffer, 511);
@@ -38,19 +34,19 @@ void PlaylistManager::scan_files() {
 			if (eq>0 && eq<data.length()-1) {
 				String rfid_id = data.substring(0, eq);
 				String folder = data.substring(eq + 1);
-				TRACE("  Adding mapping: %s=>%s\n", rfid_id.c_str(), folder.c_str());
-				_map[rfid_id] = folder;
+				Serial.printf("  Adding mapping: %s=>%s\n", rfid_id.c_str(), folder.c_str());
+				map[rfid_id] = folder;
 				
 				if (folder.charAt(0)=='/') {
 					bool found=false;
-					for (String f: folders) {
+					for (String f: dirs) {
 						if (f.equals(folder)) {
 							found = true;
 							break;
 						}
 					}
 					if (!found) {
-						INFO("WARNING: Found mapping for RFID id %s which maps to non-existing folder %s!\n", rfid_id.c_str(), folder.c_str());
+						Serial.printf("WARNING: Found mapping for RFID id %s which maps to non-existing folder %s!\n", rfid_id.c_str(), folder.c_str());
 					}
 				}
 			}
@@ -58,183 +54,40 @@ void PlaylistManager::scan_files() {
 		f.close();
 	}
 	root.close();
-
-	_unmapped_folders.clear();
-	for (String folder: folders) {
-		bool found = false;
-		for(std::map<String, String>::iterator it = _map.begin(); it != _map.end(); it++) {
-			if (it->second.equals(folder)) {
-				found = true;
-				break;
-			}
-		}
-		if (!found) {
-			// Checking folder for media files
-			File dir = SD.open(folder);
-			while (entry = dir.openNextFile()) {
-				String filename = entry.name();
-				filename = filename.substring(folder.length() + 1);
-				if (!filename.startsWith(".") && filename.endsWith(".mp3")) {
-					found = true;
-				}
-				entry.close();
-				if (found) break;
-			}
-			if (found) {
-				_unmapped_folders.push_back(folder);
-			}
-		}
-	}
-	SPIMaster::select_sd(false);
 }
 
-void PlaylistManager::_check_for_special_chars(String s) {
-	for(int i=0; i<s.length(); i++) {
-		char c = s.charAt(i);
-		if (c < 0x20 || c >= 0x7F) {
-			ERROR("WARNING: Folder / file '%s' contains non-ascii chars!\n", s.c_str());
-			return;
-		}
-	}
-}
-
-Playlist* PlaylistManager::get_playlist_for_id(String id) {
-	if (!_map.count(id)) return NULL;
-	String folder = _map[id];
-	return get_playlist_for_folder(folder);
-}
-
-Playlist* PlaylistManager::get_playlist_for_folder(String folder) {
-	Playlist* p;
-	if (!_playlists.count(folder)) {
-		p = new Playlist(folder);
-		_playlists[folder] = p;
-		if (p->persistence == PERSIST_PERMANENTLY) {
-			String search = folder;
-			search += "=";
-			SPIMaster::select_sd();
-			if (SD.exists("/_positions.txt")) {
-				File f = SD.open("/_positions.txt", "r");
-				while (true) {
-					String s = f.readStringUntil('\n');
-					if (s.length()==0) break;
-					if (s.startsWith(search)) {
-						s = s.substring(search.length());
-						int idx = s.indexOf(',');
-						String title_index = s.substring(0, idx);
-						uint32_t position = s.substring(idx+1).toInt();
-						p->set_track_by_id(title_index);
-						p->set_position(position);
-						break;
-					}
-				}
-				f.close();
-			}
-			SPIMaster::select_sd(false);
-		}
+Playlist PlaylistManager::get_playlist(String rfid_id) {
+	if (rfid_id.equals(current_rfid_tag_id)) {
+		return current_playlist;
 	} else {
-		p = _playlists[folder];
-		if (p->persistence == PERSIST_NONE) {
-			p->reset();
-		}
-	}
-	return p;
-}
-
-void PlaylistManager::dump_ids() {
-	for (std::map<String, String>::iterator it = _map.begin(); it!=_map.end(); it++) {
-		INFO("  %s -> %s\n", it->first.c_str(), it->second.c_str());
-	}
-}
-
-String PlaylistManager::json() {
-	DynamicJsonDocument json(10240);
-	json["_type"] = "playlist_manager";
-	JsonObject folders = json.createNestedObject("folders");
-	for (std::map<String, String>::iterator it = _map.begin(); it!=_map.end(); it++) {
-		folders[it->second] = it->first;
-	}
-	JsonArray started = json.createNestedArray("started");
-	for (std::map<String, Playlist*>::iterator it = _playlists.begin(); it!=_playlists.end(); it++) {
-		if (it->second->is_fresh()) continue;
-		started.add(it->first);
-	}
-	JsonArray unmapped = json.createNestedArray("unmapped");
-	for(String folder : _unmapped_folders) {
-		unmapped.add(folder);
-	}
-	return json.as<String>();
-}
-
-bool PlaylistManager::add_mapping(String id, String folder) {
-	DEBUG("Adding mapping: %s=>%s\n", id.c_str(), folder.c_str());
-	_map[id] = folder;
-	_save_mapping();
-	return true;
-}
-
-void PlaylistManager::_save_mapping() {
-	SPIMaster::select_sd();
-	File f = SD.open("/_mapping.txt", "w");
-	String s = create_mapping_txt();
-	unsigned char* buf = new unsigned char[s.length()];
-	s.getBytes(buf, s.length());
-	f.write(buf, s.length()-1);
-	f.close();
-	SPIMaster::select_sd(false);
-	delete buf;
-}
-
-String PlaylistManager::create_mapping_txt() {
-	String s;
-	for(std::map<String, String>::iterator it = _map.begin(); it != _map.end(); it++) {
-		s += it->first;
-		s += "=";
-		s += it->second;
-		s += '\n';
-	}
-	return s;
-}
-
-void PlaylistManager::persist(Playlist* p) {
-	if (p->persistence == PERSIST_NONE) {
-		_playlists.erase(p->path());
-		return;
-	} else if (p->persistence == PERSIST_PERMANENTLY) {
-	
-		String search = p->path();
-		search += '=';
-		
-		bool old_file_existed = false;
-		
-		SPIMaster::select_sd();
-		if (SD.exists("_positions.txt")) {
-			SD.rename("/_positions.txt", "/_positions.temp.txt");
-			old_file_existed = true;
-		}
-		File dst = SD.open("/_positions.txt", "w");
-		
-		if (old_file_existed) {
-			File src = SD.open("/_positions.temp.txt", "r");
-		
-			while (true) {
-				String line = src.readStringUntil('\n');
-				line.trim();
-				if (line.startsWith(search)) continue;
-				dst.println(line);
+		if (map.count(rfid_id)==0) {
+			Serial.printf("No known playlist for id %s.\n", rfid_id);
+			return current_playlist;
+		} else {
+			current_playlist = Playlist();
+			String entry = map[rfid_id];
+			if (entry.startsWith("/")) {
+				File dir = SD.open(entry);
+				while(File entry = dir.openNextFile()) {
+					String filename = entry.name();
+					String ext = filename.substring(filename.length()-4);
+					if (!entry.isDirectory() &&
+						!filename.startsWith(".") &&
+						ext.equals(".mp3")) {
+						Serial.printf("Adding %s to the list of files\n", filename);
+						current_playlist.add_file(filename);
+					}
+					entry.close();
+				}
+				dir.close();
 			}
-			
-			src.close();
-			SD.remove("/_positions.temp.txt");
+			current_playlist.sort();
+			current_rfid_tag_id = rfid_id;
+			return current_playlist;
 		}
-		
-		dst.print(search);
-		dst.print(p->get_current_track_id());
-		dst.print(',');
-		dst.println(p->get_position());
-		dst.close();
-		SPIMaster::select_sd(false);
-
-		_playlists.erase(p->path());
 	}
 }
+
+void PlaylistManager::set_audio_current_time(uint32_t time) {
+	audio_current_time = time;
+}
\ No newline at end of file
diff --git a/src/spi_master.cpp b/src/spi_master.cpp
new file mode 100644
index 0000000..09661ad
--- /dev/null
+++ b/src/spi_master.cpp
@@ -0,0 +1,26 @@
+#include "spi_master.h"
+#include <Arduino.h>
+#include "esmp3.h"
+
+void SPIMaster::initialize() {
+	pinMode(PIN_CS_SD, OUTPUT);
+	pinMode(PIN_CS_RFID, OUTPUT);
+	disable_all();
+}
+
+void SPIMaster::disable_all() {
+	digitalWrite(PIN_CS_SD, HIGH);
+	digitalWrite(PIN_CS_RFID, HIGH);
+}
+
+void SPIMaster::enable_rfid() {
+	disable_all();
+	digitalWrite(PIN_CS_RFID, LOW);
+	delay(5);
+}
+
+void SPIMaster::enable_sd() {
+	disable_all();
+	digitalWrite(PIN_CS_SD, LOW);
+	delay(5);
+}
\ No newline at end of file
diff --git a/src/updater.cpp b/src/updater.cpp
deleted file mode 100644
index 491e373..0000000
--- a/src/updater.cpp
+++ /dev/null
@@ -1,96 +0,0 @@
-#include <Arduino.h>
-#include <Update.h>
-#include "config.h"
-#include "updater.h"
-#include "http_client_wrapper.h"
-
-void Updater::run() {
-	DEBUG("Updater is running...\n");
-	HTTPClientWrapper* http = new HTTPClientWrapper();
-	DEBUG("Requesting update info...\n");
-	bool result = http->get(OTA_UPDATE_URL);
-	if (!result) {
-		ERROR("Updater failed requesting %s.\n", OTA_UPDATE_URL);
-		return;
-	}
-
-	String line_str = "";
-	if (!read_line(&line_str, http, "VERSION")) {
-		return;
-	}
-	uint16_t version = line_str.toInt();
-	if (version==0) {
-		ERROR("Could not parse version number.\n");
-		return;
-	}
-	DEBUG("Found version %d. My version is %d.\n", version, OTA_VERSION);
-	if (version <= OTA_VERSION) {
-		return;
-	}
-	
-	String image_path = "";
-	if (!read_line(&image_path, http, "IMAGE_PATH")) {
-		return;
-	}
-	
-	String image_md5 = "";
-	if (!read_line(&image_md5, http, "IMAGE_MD5")) {
-		return;
-	}
-
-	http->close();
-	delete http;
-	
-	if(do_update(U_FLASH, image_path, image_md5)) {
-		DEBUG("Update done. Rebooting...\n");
-	} else {
-		DEBUG("Update failed. Rebooting...\n");
-	}
-	delay(1000);
-	ESP.restart();
-}
-
-bool Updater::read_line(String* dst, HTTPClientWrapper* http, String expected_key) {
-	expected_key += "=";
-	String line = http->readUntil("\n");
-	if (!line.startsWith(expected_key)) {
-		ERROR("Expected line start with '%s', but it started with '%s'.\n", expected_key.c_str(), line.c_str());
-		return false;
-	}
-	line = line.substring(expected_key.length());
-	line.trim();
-	dst->concat(line);
-	return true;
-}
-
-bool Updater::do_update(int command, String url, String expected_md5) {
-	HTTPClientWrapper* http = new HTTPClientWrapper();
-	bool result = http->get(url);
-	if (!result) {
-		ERROR("Updater failed requesting %s.\n", url.c_str());
-		return false;
-	}
-	
-	result = Update.begin(http->getSize(), command);
-	if (!result) {
-		ERROR("Update could not be started.\n");
-		return false;
-	}
-	Update.setMD5(expected_md5.c_str());
-	uint8_t buf[512];
-	uint16_t len;
-	while((len = http->read(buf, 512))) {
-		Update.write(buf, len);
-	}
-	
-	http->close();
-	delete http;
-	
-	result = Update.end();
-	if (!result) {
-		const char* error = Update.errorString();
-		ERROR("Writing the update failed. The error was: %s\n", error);
-		return false;
-	}
-	return true;
-}

From 9c31f70c57f6f7bc3a351b94b07bf0aff981657b Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Sun, 21 Aug 2022 11:37:42 +0200
Subject: [PATCH 02/20] It's working more or less...

---
 include/controller.h       | 14 +++++-
 include/esmp3.h            | 27 ++++++++---
 include/playlist.h         | 12 ++++-
 include/playlist_manager.h |  1 +
 platformio.ini             |  9 ++--
 src/controller.cpp         | 93 ++++++++++++++++++++++++++++++++++++--
 src/esmp3.cpp              | 92 +++++++++++++++++++++++++++++++------
 src/playlist.cpp           | 52 +++++++++++++++++++++
 src/playlist_manager.cpp   | 16 ++++---
 9 files changed, 281 insertions(+), 35 deletions(-)

diff --git a/include/controller.h b/include/controller.h
index 7b56efe..b615ad0 100644
--- a/include/controller.h
+++ b/include/controller.h
@@ -1,13 +1,25 @@
 #pragma once
 
 #include <Arduino.h>
+#include <MFRC522v2.h>
+#include <MFRC522Debug.h>
+#include "esmp3.h"
+#include "playlist.h"
 
 class Controller {
 	private:
 	void handle_buttons();
 	void handle_rfid();
+	bool is_button_pressed(uint8_t pin);
+	Playlist current_playlist;
+	bool is_rfid_present = false;
+	unsigned long last_rfid_check = 0;
 
 	public:
 	void handle();
-	
+	void next_track();
+	void prev_track();
+	void play();
+	void play(String rfid_id);
+	void stop();
 };
\ No newline at end of file
diff --git a/include/esmp3.h b/include/esmp3.h
index d17af5d..ad39985 100644
--- a/include/esmp3.h
+++ b/include/esmp3.h
@@ -1,11 +1,26 @@
 #pragma once
-#include "controller.h"
 
-#define PIN_CS_SD     16
-#define PIN_CS_RFID   17
+#include "controller.h"
+#include "playlist_manager.h"
+#include <Audio.h>
+
+#define PIN_CS_SD     22
+#define PIN_CS_RFID   21
+
+#define PIN_BTN_VOL_UP 32
+#define PIN_BTN_VOL_DOWN 33
+#define PIN_BTN_TRACK_NEXT 34
+#define PIN_BTN_TRACK_PREV 35
 
 #define I2S_DOUT      25
-#define I2S_BCLK      27
-#define I2S_LRC       26
+#define I2S_BCLK      26
+#define I2S_LRC       27
 
-extern Controller controller;
\ No newline at end of file
+class Controller;
+
+extern Controller controller;
+extern Audio audio;
+extern PlaylistManager* pm;
+extern MFRC522* rfid;
+
+void save_audio_current_time();
\ No newline at end of file
diff --git a/include/playlist.h b/include/playlist.h
index 73691e3..4bd5731 100644
--- a/include/playlist.h
+++ b/include/playlist.h
@@ -7,9 +7,19 @@ class Playlist {
 	private:
 	std::vector<String> files;
 	uint8_t current_file = 0;
-	uint16_t current_time = 0;
+	uint32_t current_time = 0;
+	void set_current_position(uint8_t file, uint32_t position=0);
+	String rfid_id;
 
 	public:
+	Playlist(String rfid_id="");
 	void add_file(String filename);
 	void sort();
+	String get_rfid_id();
+	String get_current_file_name();
+	bool next_track();
+	bool prev_track();
+	void restart();
+	void set_current_time(uint32_t time);
+	uint32_t get_current_time();
 };
diff --git a/include/playlist_manager.h b/include/playlist_manager.h
index 551c40a..f8f5b31 100644
--- a/include/playlist_manager.h
+++ b/include/playlist_manager.h
@@ -16,6 +16,7 @@ class PlaylistManager {
 	std::vector<String> dirs;
 	std::map<String, String> map;
 	Playlist get_playlist(String rfid_id);
+	bool has_playlist(String rfid_id);
 	Playlist current_playlist;
 	void set_audio_current_time(uint32_t time);
 };
\ No newline at end of file
diff --git a/platformio.ini b/platformio.ini
index 64fddb3..7b81aee 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -18,14 +18,16 @@ lib_deps =
 platform = espressif32
 board = esp-wrover-kit
 framework = arduino
-upload_speed = 115200
-build_flags = !./build_version.sh
+upload_speed = 921600
+build_flags = -DCORE_DEBUG_LEVEL=5 -DCONFIG_ARDUHAL_LOG_COLORS=1 ; !./build_version.sh
 lib_deps = 
 	${extra.lib_deps}
 	esphome/ESP32-audioI2S@^2.1.0
-upload_port = 10.10.2.108
+	computer991/Arduino_MFRC522v2@^2.0.1
+;upload_port = 10.10.2.108
 monitor_speed = 115200
 monitor_port = /dev/cu.usbserial-0001
+monitor_filters = time, esp32_exception_decoder
 
 [env:deploy]
 platform = espressif32
@@ -34,5 +36,6 @@ framework = arduino
 lib_deps = 
 	${extra.lib_deps}
 	esphome/ESP32-audioI2S@^2.1.0
+	computer991/Arduino_MFRC522v2@^2.0.1
 board_build.embed_txtfiles = src/index.html
 board_build.partitions = partitions.csv
diff --git a/src/controller.cpp b/src/controller.cpp
index f2e476d..9618c3e 100644
--- a/src/controller.cpp
+++ b/src/controller.cpp
@@ -1,13 +1,100 @@
 #include "controller.h"
+#include "esmp3.h"
 
 void Controller::handle() {
-
+	if (last_rfid_check + 500 < millis() || last_rfid_check > millis()) {
+		handle_rfid();
+		last_rfid_check = millis();
+	}
 }
 
 void Controller::handle_buttons() {
-
+	if (is_button_pressed(PIN_BTN_VOL_UP)) {
+		audio.setVolume(min(audio.getVolume()+1, 21));
+	} else if (is_button_pressed(PIN_BTN_VOL_DOWN)) {
+		audio.setVolume(max(audio.getVolume()-1, 1));
+	} else if (is_button_pressed(PIN_BTN_TRACK_NEXT)) {
+		next_track();
+	} else if (is_button_pressed(PIN_BTN_TRACK_PREV)) {
+		prev_track();
+	}
 }
 
 void Controller::handle_rfid() {
-	
+	if (is_rfid_present) {
+		byte buffer[2];
+		byte buffer_size = 2;
+		MFRC522Constants::StatusCode status = rfid->PICC_WakeupA(buffer, &buffer_size);
+		if (status == MFRC522Constants::STATUS_OK) {
+			// Card is still present.
+			rfid->PICC_HaltA();
+		} else {
+			Serial.printf("RFID status is %s\n", MFRC522Debug::GetStatusCodeName(status));
+			is_rfid_present = false;
+			Serial.println("No more RFID card.\n");
+			stop();
+		}
+	} else {
+		if (rfid->PICC_IsNewCardPresent()) {
+			if (rfid->PICC_ReadCardSerial()) {
+				uint32_t uid = rfid->uid.uidByte[0]<<24 | rfid->uid.uidByte[1]<<16 | rfid->uid.uidByte[2]<<8 | rfid->uid.uidByte[3];
+				Serial.printf("Found new rfid card with uid %x\n", uid);
+				is_rfid_present = true;
+				if (uid > 0) {
+					String temp = String(uid, HEX);
+					String s_uid = "";
+					for (int i=0; i<(8-temp.length()); i++) {
+						s_uid.concat("0");
+					}
+					s_uid.concat(temp);
+					play(s_uid);
+				}
+				rfid->PICC_HaltA();
+			}
+		}
+	}
+}
+
+void Controller::play(String rfid_id) {
+	if (!rfid_id.equals(current_playlist.get_rfid_id())) {
+		if (pm->has_playlist(rfid_id)) {
+			current_playlist = pm->get_playlist(rfid_id);
+			play();
+		} else {
+			Serial.printf("There is no playlist for rfid_id %s\n", rfid_id.c_str());
+		}
+	} else {
+		if (!audio.isRunning()) {
+			play();
+		}
+	}
+}
+
+void Controller::play() {
+	String file = current_playlist.get_current_file_name();
+	Serial.printf("Playing file: %s\n", file.c_str());
+	audio.connecttoFS(SD, file.c_str(), current_playlist.get_current_time());
+}
+
+void Controller::next_track() {
+	if (current_playlist.next_track()) {
+		play();
+	}
+}
+
+void Controller::prev_track() {
+	if (audio.getAudioCurrentTime() <= 5) {
+		current_playlist.restart();
+		play();
+	} else {
+		if (current_playlist.prev_track()) {
+			play();
+		}
+	}
+}
+
+void Controller::stop() {
+	if (audio.isRunning()) {
+		current_playlist.set_current_time(audio.stopSong());
+	}
 }
\ No newline at end of file
diff --git a/src/esmp3.cpp b/src/esmp3.cpp
index 1e3b830..96dfa3e 100644
--- a/src/esmp3.cpp
+++ b/src/esmp3.cpp
@@ -7,33 +7,53 @@
 #include <Audio.h>
 #include "esmp3.h"
 #include <Ticker.h>
+#include <MFRC522v2.h>
+#include <MFRC522DriverSPI.h>
+#include <MFRC522DriverPinSimple.h>
+#include <MFRC522Debug.h>
+#include <Arduino.h>
+#include <Wire.h>
 
 Controller controller;
 Audio audio;
-Ticker ticker_save_audio_current_time;
 PlaylistManager* pm;
+MFRC522* rfid;
 
 void setup() {
+	pinMode(PIN_CS_SD, OUTPUT);		digitalWrite(PIN_CS_SD, HIGH);
+	pinMode(PIN_CS_RFID, OUTPUT);	digitalWrite(PIN_CS_RFID, HIGH);
 	Serial.begin(115200);
 	WiFi.begin("Schlenz", "1410WischlingenPanda");
-	Serial.print("Connecting to WiFi...");
+	log_i("Connecting to WiFi...");
+	uint8_t i=9;
 	while(WiFi.status() != WL_CONNECTED) {
-		Serial.print(".");
-		delay(500);
+		Serial.print(i);
+		Serial.print("... ");
+		delay(1000);
+		i--;
+		if (i==0) {
+			Serial.println("Could not connect to WiFi. Restarting in 1s.");
+			delay(1000);
+			ESP.restart();
+		}
 	}
 	Serial.println();
 	Serial.print("Connected to WiFi. IP address: ");
 	Serial.println(WiFi.localIP());
-
 	ArduinoOTA.begin();
+	Serial.println("Waiting for OTA...");
+	for(int i=0; i<20; i++) {
+		ArduinoOTA.handle();
+		delay(100);
+	}
 	Serial.println("Initializing SPI...");
 	SPI.begin();
-	SPI.setHwCs(false);
-	SPIMaster::initialize();
+	//SPI.setHwCs(false);
+	//SPIMaster::initialize();
 
 	Serial.print("Initializing SD card...");
-	SPIMaster::enable_sd();
-	while(!SD.begin(14, SPI, 25000000)) {
+	//SPIMaster::enable_sd();
+	while(!SD.begin(PIN_CS_SD, SPI, 25000000)) {
 		for(int i=0; i<10; i++) {
 			if(SPI.transfer(0xFF)==0xFF) break;
 			delay(10);
@@ -46,15 +66,29 @@ void setup() {
 	Serial.println("Initializing PlaylistManager...");
 	pm = new PlaylistManager();
 
+	Serial.println("Setting up rfid reader...");
+	pinMode(PIN_CS_RFID, OUTPUT);
+	MFRC522DriverPin* pin = new MFRC522DriverPinSimple(PIN_CS_RFID);
+	MFRC522Driver* spi = new MFRC522DriverSPI(*pin);
+	rfid = new MFRC522(*spi);
+	rfid->PCD_Init();
+	MFRC522Debug::PCD_DumpVersionToSerial(*rfid, Serial);
+
+	Serial.println("Setting up buttons...");
+	pinMode(PIN_BTN_VOL_UP, INPUT_PULLUP);
+	pinMode(PIN_BTN_VOL_DOWN, INPUT_PULLUP);
+	pinMode(PIN_BTN_TRACK_NEXT, INPUT_PULLUP);
+	pinMode(PIN_BTN_TRACK_PREV, INPUT_PULLUP);
+
 	Serial.println("Setting up audio...");
 	audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
 	audio.setVolume(15);
 	audio.forceMono(true);
 
-	Serial.println("Setting up tickers...");
-	ticker_save_audio_current_time.attach(5, save_audio_current_time);
-
 	Serial.println("Setup finished.");
+
+	audio.setVolume(3);
+	audio.connecttospeech("Die Papabox ist nun einsatzbereit!", "de_DE");
 }
 
 void loop() {
@@ -63,6 +97,34 @@ void loop() {
 	audio.loop();
 }
 
-void save_audio_current_time() {
-	pm->set_audio_current_time(audio.getAudioCurrentTime());
-}
\ No newline at end of file
+void audio_info(const char *info){
+    Serial.print("info        "); Serial.println(info);
+}
+void audio_id3data(const char *info){  //id3 metadata
+    Serial.print("id3data     ");Serial.println(info);
+}
+void audio_eof_mp3(const char *info){  //end of file
+    Serial.print("eof_mp3     ");Serial.println(info);
+	controller.next_track();
+}
+void audio_showstation(const char *info){
+    Serial.print("station     ");Serial.println(info);
+}
+void audio_showstreamtitle(const char *info){
+    Serial.print("streamtitle ");Serial.println(info);
+}
+void audio_bitrate(const char *info){
+    Serial.print("bitrate     ");Serial.println(info);
+}
+void audio_commercial(const char *info){  //duration in sec
+    Serial.print("commercial  ");Serial.println(info);
+}
+void audio_icyurl(const char *info){  //homepage
+    Serial.print("icyurl      ");Serial.println(info);
+}
+void audio_lasthost(const char *info){  //stream URL played
+    Serial.print("lasthost    ");Serial.println(info);
+}
+void audio_eof_speech(const char *info){
+    Serial.print("eof_speech  ");Serial.println(info);
+}
diff --git a/src/playlist.cpp b/src/playlist.cpp
index d59c75e..4553afc 100644
--- a/src/playlist.cpp
+++ b/src/playlist.cpp
@@ -1,9 +1,61 @@
 #include "playlist.h"
 
+Playlist::Playlist(String id) {
+	rfid_id = id;
+}
+
+String Playlist::get_rfid_id() {
+	return rfid_id;
+}
+
 void Playlist::add_file(String filename) {
 	files.push_back(filename);
 }
 
 void Playlist::sort() {
 	std::sort(files.begin(), files.end());
+}
+
+void Playlist::set_current_position(uint8_t file, uint32_t seconds) {
+	current_file = file;
+	current_time = seconds;
+}
+
+String Playlist::get_current_file_name() {
+	if (current_file >= files.size()) {
+		Serial.printf("Requested a file number %d, which is not available in this playlist. Starting over.\n", current_file);
+		set_current_position(0);
+	}
+	return files[current_file];
+}
+
+bool Playlist::next_track() {
+	if (files.size() <= current_file + 1) {
+		Serial.println("next_track does not exist. Resetting playlist and returning false.");
+		set_current_position(0, 0);
+		return false;
+	}
+	set_current_position(current_file + 1, 0);
+	return true;
+}
+
+bool Playlist::prev_track() {
+	if (current_file == 0) {
+		return false;
+	}
+	
+	set_current_position(current_file - 1, 0);
+	return true;
+}
+
+void Playlist::restart() {
+	current_time = 0;
+}
+
+void Playlist::set_current_time(uint32_t pos) {
+	current_time = pos;
+}
+
+uint32_t Playlist::get_current_time() {
+	return current_time;
 }
\ No newline at end of file
diff --git a/src/playlist_manager.cpp b/src/playlist_manager.cpp
index dc9f3da..1b4c2ee 100644
--- a/src/playlist_manager.cpp
+++ b/src/playlist_manager.cpp
@@ -64,18 +64,18 @@ Playlist PlaylistManager::get_playlist(String rfid_id) {
 			Serial.printf("No known playlist for id %s.\n", rfid_id);
 			return current_playlist;
 		} else {
-			current_playlist = Playlist();
-			String entry = map[rfid_id];
-			if (entry.startsWith("/")) {
-				File dir = SD.open(entry);
+			current_playlist = Playlist(rfid_id);
+			String path = map[rfid_id];
+			if (path.startsWith("/")) {
+				File dir = SD.open(path);
 				while(File entry = dir.openNextFile()) {
 					String filename = entry.name();
 					String ext = filename.substring(filename.length()-4);
 					if (!entry.isDirectory() &&
 						!filename.startsWith(".") &&
 						ext.equals(".mp3")) {
-						Serial.printf("Adding %s to the list of files\n", filename);
-						current_playlist.add_file(filename);
+						Serial.printf("Adding %s to the list of files\n", (path + "/" + filename).c_str());
+						current_playlist.add_file(path + "/" + filename);
 					}
 					entry.close();
 				}
@@ -90,4 +90,8 @@ Playlist PlaylistManager::get_playlist(String rfid_id) {
 
 void PlaylistManager::set_audio_current_time(uint32_t time) {
 	audio_current_time = time;
+}
+
+bool PlaylistManager::has_playlist(String rfid_id) {
+	return map.count(rfid_id) == 1;
 }
\ No newline at end of file

From 4840c150c207c1cc396220afbd64feffeb3df696 Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Sun, 21 Aug 2022 14:00:52 +0200
Subject: [PATCH 03/20] Button handling implemented.

---
 include/controller.h |  3 +++
 include/esmp3.h      |  4 ++--
 src/controller.cpp   | 40 +++++++++++++++++++++++++++++++++++++---
 src/playlist.cpp     |  7 ++++---
 4 files changed, 46 insertions(+), 8 deletions(-)

diff --git a/include/controller.h b/include/controller.h
index b615ad0..149c3e8 100644
--- a/include/controller.h
+++ b/include/controller.h
@@ -14,6 +14,9 @@ class Controller {
 	Playlist current_playlist;
 	bool is_rfid_present = false;
 	unsigned long last_rfid_check = 0;
+	uint8_t button_pressed = 0;
+	unsigned long button_pressed_since = 0;
+	bool button_already_processed = false;
 
 	public:
 	void handle();
diff --git a/include/esmp3.h b/include/esmp3.h
index ad39985..84658fa 100644
--- a/include/esmp3.h
+++ b/include/esmp3.h
@@ -9,8 +9,8 @@
 
 #define PIN_BTN_VOL_UP 32
 #define PIN_BTN_VOL_DOWN 33
-#define PIN_BTN_TRACK_NEXT 34
-#define PIN_BTN_TRACK_PREV 35
+#define PIN_BTN_TRACK_NEXT 17
+#define PIN_BTN_TRACK_PREV 16
 
 #define I2S_DOUT      25
 #define I2S_BCLK      26
diff --git a/src/controller.cpp b/src/controller.cpp
index 9618c3e..3e1b1b2 100644
--- a/src/controller.cpp
+++ b/src/controller.cpp
@@ -6,16 +6,25 @@ void Controller::handle() {
 		handle_rfid();
 		last_rfid_check = millis();
 	}
+	handle_buttons();
 }
 
 void Controller::handle_buttons() {
 	if (is_button_pressed(PIN_BTN_VOL_UP)) {
-		audio.setVolume(min(audio.getVolume()+1, 21));
+		log_i("BTN_VOL_UP pressed");
+		uint8_t vol = min(audio.getVolume()+1, 21);
+		log_d("Setting new volume %d", vol);
+		audio.setVolume(vol);
 	} else if (is_button_pressed(PIN_BTN_VOL_DOWN)) {
-		audio.setVolume(max(audio.getVolume()-1, 1));
+		log_i("BTN_VOL_DOWN pressed");
+		uint8_t vol = max(audio.getVolume()-1, 1);
+		log_d("Setting new volume %d", vol);
+		audio.setVolume(vol);
 	} else if (is_button_pressed(PIN_BTN_TRACK_NEXT)) {
+		log_i("BTN_TRACK_NEXT pressed");
 		next_track();
 	} else if (is_button_pressed(PIN_BTN_TRACK_PREV)) {
+		log_i("BTN_TRACK_PREV pressed");
 		prev_track();
 	}
 }
@@ -83,7 +92,10 @@ void Controller::next_track() {
 }
 
 void Controller::prev_track() {
-	if (audio.getAudioCurrentTime() <= 5) {
+	uint32_t time = audio.getAudioCurrentTime();
+	log_d("prev_track() called. getAudioCurrentTime() returns %d", time);
+	if (time >= 5) {
+		log_d("Restarting current track.");
 		current_playlist.restart();
 		play();
 	} else {
@@ -97,4 +109,26 @@ void Controller::stop() {
 	if (audio.isRunning()) {
 		current_playlist.set_current_time(audio.stopSong());
 	}
+}
+
+bool Controller::is_button_pressed(uint8_t pin) {
+	//log_d("Button %d state is %d", pin, digitalRead(pin));
+	if (!digitalRead(pin)) {
+		// Button is pressed - let's debounce it.
+		if (button_pressed == pin) {
+			if (button_pressed_since + 150 < millis() && !button_already_processed) {
+				button_already_processed = true;
+				return true;
+			}
+		} else {
+			button_pressed = pin;
+			button_pressed_since = millis();
+			button_already_processed = false;
+		}
+	} else {
+		if (button_pressed == pin) {
+			button_pressed = 0;
+		}
+	}
+	return false;
 }
\ No newline at end of file
diff --git a/src/playlist.cpp b/src/playlist.cpp
index 4553afc..f5b9403 100644
--- a/src/playlist.cpp
+++ b/src/playlist.cpp
@@ -40,11 +40,12 @@ bool Playlist::next_track() {
 }
 
 bool Playlist::prev_track() {
+	log_d("Playlist::prev_track called. current_file is %d", current_file);
 	if (current_file == 0) {
-		return false;
+		set_current_position(0, 0);
+	} else {
+		set_current_position(current_file - 1, 0);
 	}
-	
-	set_current_position(current_file - 1, 0);
 	return true;
 }
 

From 45dfe0cfe0e6016bf9bb5d8135114b2c94743546 Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Sun, 21 Aug 2022 15:26:29 +0200
Subject: [PATCH 04/20] Don't read all dirs at startup.

---
 include/playlist_manager.h | 1 -
 src/esmp3.cpp              | 3 ++-
 src/playlist_manager.cpp   | 8 +++++---
 3 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/include/playlist_manager.h b/include/playlist_manager.h
index f8f5b31..ab07ad2 100644
--- a/include/playlist_manager.h
+++ b/include/playlist_manager.h
@@ -13,7 +13,6 @@ class PlaylistManager {
 
 	public:
 	PlaylistManager();
-	std::vector<String> dirs;
 	std::map<String, String> map;
 	Playlist get_playlist(String rfid_id);
 	bool has_playlist(String rfid_id);
diff --git a/src/esmp3.cpp b/src/esmp3.cpp
index 96dfa3e..b69b2b5 100644
--- a/src/esmp3.cpp
+++ b/src/esmp3.cpp
@@ -22,6 +22,7 @@ MFRC522* rfid;
 void setup() {
 	pinMode(PIN_CS_SD, OUTPUT);		digitalWrite(PIN_CS_SD, HIGH);
 	pinMode(PIN_CS_RFID, OUTPUT);	digitalWrite(PIN_CS_RFID, HIGH);
+
 	Serial.begin(115200);
 	WiFi.begin("Schlenz", "1410WischlingenPanda");
 	log_i("Connecting to WiFi...");
@@ -41,7 +42,7 @@ void setup() {
 	Serial.print("Connected to WiFi. IP address: ");
 	Serial.println(WiFi.localIP());
 	ArduinoOTA.begin();
-	Serial.println("Waiting for OTA...");
+	log_i("Waiting for OTA...");
 	for(int i=0; i<20; i++) {
 		ArduinoOTA.handle();
 		delay(100);
diff --git a/src/playlist_manager.cpp b/src/playlist_manager.cpp
index 1b4c2ee..9c0f635 100644
--- a/src/playlist_manager.cpp
+++ b/src/playlist_manager.cpp
@@ -6,6 +6,7 @@ PlaylistManager::PlaylistManager() {
 	SPIMaster::enable_sd();
 	current_rfid_tag_id = String("");
 
+	/*
 	File root = SD.open("/");
 	while(File entry = root.openNextFile()) {
 		if (entry.isDirectory()) {
@@ -17,6 +18,8 @@ PlaylistManager::PlaylistManager() {
 			}
 		}
 	}
+	root.close();
+	*/
 
 	if (!SD.exists("/_mapping.txt")) {
 		Serial.println("WARNING: /_mapping.txt not found!");
@@ -37,7 +40,7 @@ PlaylistManager::PlaylistManager() {
 				Serial.printf("  Adding mapping: %s=>%s\n", rfid_id.c_str(), folder.c_str());
 				map[rfid_id] = folder;
 				
-				if (folder.charAt(0)=='/') {
+				/*if (folder.charAt(0)=='/') {
 					bool found=false;
 					for (String f: dirs) {
 						if (f.equals(folder)) {
@@ -48,12 +51,11 @@ PlaylistManager::PlaylistManager() {
 					if (!found) {
 						Serial.printf("WARNING: Found mapping for RFID id %s which maps to non-existing folder %s!\n", rfid_id.c_str(), folder.c_str());
 					}
-				}
+				}*/
 			}
 		}
 		f.close();
 	}
-	root.close();
 }
 
 Playlist PlaylistManager::get_playlist(String rfid_id) {

From 6ddf1efd629f0234e44fb5737e2fda5c7f276aa6 Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Sun, 21 Aug 2022 15:27:00 +0200
Subject: [PATCH 05/20] Prevent playing prev_track if there are no tracks.

---
 src/playlist.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/playlist.cpp b/src/playlist.cpp
index f5b9403..ae7daab 100644
--- a/src/playlist.cpp
+++ b/src/playlist.cpp
@@ -46,7 +46,7 @@ bool Playlist::prev_track() {
 	} else {
 		set_current_position(current_file - 1, 0);
 	}
-	return true;
+	return files.size()>0;
 }
 
 void Playlist::restart() {

From 3272921db285d939e360a18a78607f0a97e322fc Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Sun, 21 Aug 2022 17:40:22 +0200
Subject: [PATCH 06/20] Daten von RFID-Karten (versuchen zu) lesen.

---
 include/controller.h |  3 ++-
 src/controller.cpp   | 63 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 65 insertions(+), 1 deletion(-)

diff --git a/include/controller.h b/include/controller.h
index 149c3e8..bdf8394 100644
--- a/include/controller.h
+++ b/include/controller.h
@@ -17,7 +17,8 @@ class Controller {
 	uint8_t button_pressed = 0;
 	unsigned long button_pressed_since = 0;
 	bool button_already_processed = false;
-
+	String read_rfid_data();
+	
 	public:
 	void handle();
 	void next_track();
diff --git a/src/controller.cpp b/src/controller.cpp
index 3e1b1b2..473eabc 100644
--- a/src/controller.cpp
+++ b/src/controller.cpp
@@ -56,6 +56,9 @@ void Controller::handle_rfid() {
 						s_uid.concat("0");
 					}
 					s_uid.concat(temp);
+
+					String data = read_rfid_data();
+
 					play(s_uid);
 				}
 				rfid->PICC_HaltA();
@@ -64,6 +67,66 @@ void Controller::handle_rfid() {
 	}
 }
 
+String Controller::read_rfid_data() {
+	log_v("read_rfid_data() running...");
+	static MFRC522::MIFARE_Key keys[8] = {
+		{{0xd3, 0xf7, 0xd3, 0xf7, 0xd3, 0xf7}}, // D3 F7 D3 F7 D3 F7
+		{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}}, // FF FF FF FF FF FF = factory default
+		{{0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5}}, // A0 A1 A2 A3 A4 A5
+		{{0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5}}, // B0 B1 B2 B3 B4 B5
+		{{0x4d, 0x3a, 0x99, 0xc3, 0x51, 0xdd}}, // 4D 3A 99 C3 51 DD
+		{{0x1a, 0x98, 0x2c, 0x7e, 0x45, 0x9a}}, // 1A 98 2C 7E 45 9A
+		{{0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff}}, // AA BB CC DD EE FF
+		{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00}}  // 00 00 00 00 00 00
+	};
+	log_d("Trying to read RFID data...");
+	
+	String data = "";
+	MFRC522::PICC_Type type = rfid->PICC_GetType(rfid->uid.sak);
+	
+	uint8_t sectors = 0;
+	switch(type) {
+		case MFRC522Constants::PICC_TYPE_MIFARE_MINI: sectors = 5; break;
+		case MFRC522Constants::PICC_TYPE_MIFARE_1K: sectors = 16; break;
+		case MFRC522Constants::PICC_TYPE_MIFARE_4K: sectors = 40; break;
+		default: log_i("Unknown PICC type %s\n", String(MFRC522Debug::PICC_GetTypeName(type)).c_str());
+	}
+	sectors = 2; // Pretend we have only two sectors, so we read only sector #1.
+	for (uint8_t sector=1; sector<sectors; sector++) {
+		uint8_t blocks = (sector < 32) ? 4 : 16;
+		uint8_t block_offset = (sector < 32) ? sector * 4 : 128 + (sector - 32) * 16;
+		
+		MFRC522::StatusCode status;
+
+		for (int i=0; i<8; i++) {
+			MFRC522::MIFARE_Key *k = &keys[i];
+			log_v("Trying MIFARE key %02X %02X %02X %02X %02X %02X...\n", k->keyByte[0], k->keyByte[1], k->keyByte[2], k->keyByte[3], k->keyByte[4], k->keyByte[5]);
+			status = rfid->PCD_Authenticate(MFRC522Constants::PICC_CMD_MF_AUTH_KEY_A, block_offset, k, &rfid->uid);
+			if (status == MFRC522Constants::STATUS_OK) {
+				log_v("Authentication succeeded with key #%d\n", i);
+				break;
+			}
+		}
+		for (uint8_t block=0; block<blocks-1; block++) {
+			byte buffer[18];
+			uint8_t byte_count = 18;
+			status = rfid->MIFARE_Read(block_offset + block, buffer, &byte_count);
+			if (status != MFRC522Constants::STATUS_OK) {
+				log_d("MIFARE_Read() failed: %s\n", String(MFRC522Debug::GetStatusCodeName(status)).c_str());
+				continue;
+			}
+			for (int i=0; i<16; i++) {
+				if (buffer[i]>=0x20 && buffer[i]<0x7F) data.concat((char)buffer[i]);
+			}
+		}
+	}
+	
+	//_rfid->PICC_HaltA();
+	rfid->PCD_StopCrypto1();
+	log_d("Data from RFID: %s\n", data.c_str());
+	return data;
+}
+
 void Controller::play(String rfid_id) {
 	if (!rfid_id.equals(current_playlist.get_rfid_id())) {
 		if (pm->has_playlist(rfid_id)) {

From 2908d23e6017653786f0fff6af4132e7a94dbb60 Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Sun, 21 Aug 2022 17:40:32 +0200
Subject: [PATCH 07/20] =?UTF-8?q?Alten=20Code=20gel=C3=B6scht.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/playlist_manager.cpp | 28 ----------------------------
 1 file changed, 28 deletions(-)

diff --git a/src/playlist_manager.cpp b/src/playlist_manager.cpp
index 9c0f635..91ac74b 100644
--- a/src/playlist_manager.cpp
+++ b/src/playlist_manager.cpp
@@ -6,21 +6,6 @@ PlaylistManager::PlaylistManager() {
 	SPIMaster::enable_sd();
 	current_rfid_tag_id = String("");
 
-	/*
-	File root = SD.open("/");
-	while(File entry = root.openNextFile()) {
-		if (entry.isDirectory()) {
-			String filename("/");
-			filename.concat(entry.name());
-			if (!filename.startsWith("/.")) {
-				Serial.println(filename);
-				dirs.push_back(filename);
-			}
-		}
-	}
-	root.close();
-	*/
-
 	if (!SD.exists("/_mapping.txt")) {
 		Serial.println("WARNING: /_mapping.txt not found!");
 	} else {
@@ -39,19 +24,6 @@ PlaylistManager::PlaylistManager() {
 				String folder = data.substring(eq + 1);
 				Serial.printf("  Adding mapping: %s=>%s\n", rfid_id.c_str(), folder.c_str());
 				map[rfid_id] = folder;
-				
-				/*if (folder.charAt(0)=='/') {
-					bool found=false;
-					for (String f: dirs) {
-						if (f.equals(folder)) {
-							found = true;
-							break;
-						}
-					}
-					if (!found) {
-						Serial.printf("WARNING: Found mapping for RFID id %s which maps to non-existing folder %s!\n", rfid_id.c_str(), folder.c_str());
-					}
-				}*/
 			}
 		}
 		f.close();

From aed9c416bf23bffa3d6b0762d372164c6a3bacb0 Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Sun, 21 Aug 2022 17:40:50 +0200
Subject: [PATCH 08/20] =?UTF-8?q?Standard-Lautst=C3=A4rke=2012=20statt=203?=
 =?UTF-8?q?.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/esmp3.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/esmp3.cpp b/src/esmp3.cpp
index b69b2b5..25ba11e 100644
--- a/src/esmp3.cpp
+++ b/src/esmp3.cpp
@@ -88,7 +88,7 @@ void setup() {
 
 	Serial.println("Setup finished.");
 
-	audio.setVolume(3);
+	audio.setVolume(12);
 	audio.connecttospeech("Die Papabox ist nun einsatzbereit!", "de_DE");
 }
 

From 9a39b00a65df4ffebbb99eb0cd9cfbf4ad00611e Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Sun, 21 Aug 2022 17:42:58 +0200
Subject: [PATCH 09/20] =?UTF-8?q?Lautst=C3=A4rke-=C3=84nderungen=20in=202e?=
 =?UTF-8?q?r-Schritten.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/controller.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/controller.cpp b/src/controller.cpp
index 473eabc..a40667d 100644
--- a/src/controller.cpp
+++ b/src/controller.cpp
@@ -12,12 +12,17 @@ void Controller::handle() {
 void Controller::handle_buttons() {
 	if (is_button_pressed(PIN_BTN_VOL_UP)) {
 		log_i("BTN_VOL_UP pressed");
-		uint8_t vol = min(audio.getVolume()+1, 21);
+		uint8_t vol = min(audio.getVolume()+2, 21);
 		log_d("Setting new volume %d", vol);
 		audio.setVolume(vol);
 	} else if (is_button_pressed(PIN_BTN_VOL_DOWN)) {
 		log_i("BTN_VOL_DOWN pressed");
-		uint8_t vol = max(audio.getVolume()-1, 1);
+		uint8_t vol;
+		if ((vol = audio.getVolume()) >= 3) {
+			vol -= 2;
+		} else {
+			vol = 1;
+		}
 		log_d("Setting new volume %d", vol);
 		audio.setVolume(vol);
 	} else if (is_button_pressed(PIN_BTN_TRACK_NEXT)) {

From cf433a48b28c13231151e4725e5757dc336fb928 Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Mon, 22 Aug 2022 08:51:19 +0200
Subject: [PATCH 10/20] Support for http(s) links in _mapping.txt

---
 src/controller.cpp       | 10 ++++++++--
 src/playlist_manager.cpp |  3 +++
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/controller.cpp b/src/controller.cpp
index a40667d..1eab3d7 100644
--- a/src/controller.cpp
+++ b/src/controller.cpp
@@ -149,8 +149,14 @@ void Controller::play(String rfid_id) {
 
 void Controller::play() {
 	String file = current_playlist.get_current_file_name();
-	Serial.printf("Playing file: %s\n", file.c_str());
-	audio.connecttoFS(SD, file.c_str(), current_playlist.get_current_time());
+	
+	if (file.startsWith("/")) {
+		log_i("Playing file %s via connecttoFS", file.c_str());
+		audio.connecttoFS(SD, file.c_str(), current_playlist.get_current_time());
+	} else if (file.startsWith("http")) {
+		log_i("Playing URL %s via connecttohost", file.c_str());
+		audio.connecttohost(file.c_str());
+	}
 }
 
 void Controller::next_track() {
diff --git a/src/playlist_manager.cpp b/src/playlist_manager.cpp
index 91ac74b..75f2776 100644
--- a/src/playlist_manager.cpp
+++ b/src/playlist_manager.cpp
@@ -54,6 +54,9 @@ Playlist PlaylistManager::get_playlist(String rfid_id) {
 					entry.close();
 				}
 				dir.close();
+			} else if (path.startsWith("http")) {
+				Serial.printf("Adding URL %s to the list of files\n", path.c_str());
+				current_playlist.add_file(path);
 			}
 			current_playlist.sort();
 			current_rfid_tag_id = rfid_id;

From 69892489709f3cf5a1f18485d101544415f7f7c3 Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Mon, 22 Aug 2022 08:51:29 +0200
Subject: [PATCH 11/20] Less debugging messages.

---
 platformio.ini | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/platformio.ini b/platformio.ini
index 7b81aee..2cef77b 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -19,7 +19,7 @@ platform = espressif32
 board = esp-wrover-kit
 framework = arduino
 upload_speed = 921600
-build_flags = -DCORE_DEBUG_LEVEL=5 -DCONFIG_ARDUHAL_LOG_COLORS=1 ; !./build_version.sh
+build_flags = -DCORE_DEBUG_LEVEL=3 -DCONFIG_ARDUHAL_LOG_COLORS=1 ; !./build_version.sh
 lib_deps = 
 	${extra.lib_deps}
 	esphome/ESP32-audioI2S@^2.1.0

From 7dcb0cb673d5895737f146384c50a6f35b77c361 Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Mon, 22 Aug 2022 08:52:09 +0200
Subject: [PATCH 12/20] Allocate a bigger (30KByte) Buffer for Audio.

---
 src/esmp3.cpp | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/esmp3.cpp b/src/esmp3.cpp
index 25ba11e..3e1656e 100644
--- a/src/esmp3.cpp
+++ b/src/esmp3.cpp
@@ -47,6 +47,14 @@ void setup() {
 		ArduinoOTA.handle();
 		delay(100);
 	}
+
+	Serial.println("Setting up audio...");
+	audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
+	audio.setVolume(1);
+	audio.forceMono(true);
+	audio.setBufsize(30000, -1);
+	audio.setConnectionTimeout(1000, 1000);
+
 	Serial.println("Initializing SPI...");
 	SPI.begin();
 	//SPI.setHwCs(false);
@@ -81,11 +89,6 @@ void setup() {
 	pinMode(PIN_BTN_TRACK_NEXT, INPUT_PULLUP);
 	pinMode(PIN_BTN_TRACK_PREV, INPUT_PULLUP);
 
-	Serial.println("Setting up audio...");
-	audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
-	audio.setVolume(15);
-	audio.forceMono(true);
-
 	Serial.println("Setup finished.");
 
 	audio.setVolume(12);

From 3718f45983338a69fa6dd4645fee73c4b8f4f46d Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Mon, 22 Aug 2022 13:55:57 +0200
Subject: [PATCH 13/20] Loglevel up to full debugging. ;-)

---
 platformio.ini | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/platformio.ini b/platformio.ini
index 2cef77b..7b81aee 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -19,7 +19,7 @@ platform = espressif32
 board = esp-wrover-kit
 framework = arduino
 upload_speed = 921600
-build_flags = -DCORE_DEBUG_LEVEL=3 -DCONFIG_ARDUHAL_LOG_COLORS=1 ; !./build_version.sh
+build_flags = -DCORE_DEBUG_LEVEL=5 -DCONFIG_ARDUHAL_LOG_COLORS=1 ; !./build_version.sh
 lib_deps = 
 	${extra.lib_deps}
 	esphome/ESP32-audioI2S@^2.1.0

From fb6b5bced604ffe2943affcf4e1af4b7bcaad510 Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Mon, 22 Aug 2022 13:56:43 +0200
Subject: [PATCH 14/20] Test for button press every 50ms. That's more than
 enough.

---
 include/controller.h | 1 +
 src/controller.cpp   | 5 ++++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/controller.h b/include/controller.h
index bdf8394..9a054a1 100644
--- a/include/controller.h
+++ b/include/controller.h
@@ -14,6 +14,7 @@ class Controller {
 	Playlist current_playlist;
 	bool is_rfid_present = false;
 	unsigned long last_rfid_check = 0;
+	unsigned long last_button_check = 0;
 	uint8_t button_pressed = 0;
 	unsigned long button_pressed_since = 0;
 	bool button_already_processed = false;
diff --git a/src/controller.cpp b/src/controller.cpp
index 1eab3d7..e491e7f 100644
--- a/src/controller.cpp
+++ b/src/controller.cpp
@@ -6,7 +6,10 @@ void Controller::handle() {
 		handle_rfid();
 		last_rfid_check = millis();
 	}
-	handle_buttons();
+	if (last_button_check + 10 < millis() || last_button_check > millis()) {
+		handle_buttons();
+		last_button_check = millis();
+	}
 }
 
 void Controller::handle_buttons() {

From b9df55012fa9cdbb40e755220d84001a1d5a31e9 Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Mon, 22 Aug 2022 13:57:20 +0200
Subject: [PATCH 15/20] Better handling of eof_mp3 events: Keep playing as long
 as there is data remaining.

---
 include/controller.h | 1 +
 src/controller.cpp   | 6 ++++++
 src/esmp3.cpp        | 2 +-
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/include/controller.h b/include/controller.h
index 9a054a1..b9892cc 100644
--- a/include/controller.h
+++ b/include/controller.h
@@ -27,4 +27,5 @@ class Controller {
 	void play();
 	void play(String rfid_id);
 	void stop();
+	void eof_mp3();
 };
\ No newline at end of file
diff --git a/src/controller.cpp b/src/controller.cpp
index e491e7f..2d9f723 100644
--- a/src/controller.cpp
+++ b/src/controller.cpp
@@ -208,4 +208,10 @@ bool Controller::is_button_pressed(uint8_t pin) {
 		}
 	}
 	return false;
+}
+
+void Controller::eof_mp3() {
+	log_d("Handling eof. Keep playing until the file is finished.");
+	while(audio.isRunning()) { audio.loop(); yield; }
+	next_track();
 }
\ No newline at end of file
diff --git a/src/esmp3.cpp b/src/esmp3.cpp
index 3e1656e..8aeb14a 100644
--- a/src/esmp3.cpp
+++ b/src/esmp3.cpp
@@ -109,7 +109,7 @@ void audio_id3data(const char *info){  //id3 metadata
 }
 void audio_eof_mp3(const char *info){  //end of file
     Serial.print("eof_mp3     ");Serial.println(info);
-	controller.next_track();
+	controller.eof_mp3();
 }
 void audio_showstation(const char *info){
     Serial.print("station     ");Serial.println(info);

From 15a65f7391d5f31b02a4a4052a58548597a23ba2 Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Mon, 22 Aug 2022 13:58:22 +0200
Subject: [PATCH 16/20] Added reaing of RFID contents.

---
 src/controller.cpp | 82 ++++++++++++++++++++--------------------------
 1 file changed, 35 insertions(+), 47 deletions(-)

diff --git a/src/controller.cpp b/src/controller.cpp
index 2d9f723..90e424a 100644
--- a/src/controller.cpp
+++ b/src/controller.cpp
@@ -77,61 +77,49 @@ void Controller::handle_rfid() {
 
 String Controller::read_rfid_data() {
 	log_v("read_rfid_data() running...");
-	static MFRC522::MIFARE_Key keys[8] = {
-		{{0xd3, 0xf7, 0xd3, 0xf7, 0xd3, 0xf7}}, // D3 F7 D3 F7 D3 F7
-		{{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}}, // FF FF FF FF FF FF = factory default
-		{{0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5}}, // A0 A1 A2 A3 A4 A5
-		{{0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5}}, // B0 B1 B2 B3 B4 B5
-		{{0x4d, 0x3a, 0x99, 0xc3, 0x51, 0xdd}}, // 4D 3A 99 C3 51 DD
-		{{0x1a, 0x98, 0x2c, 0x7e, 0x45, 0x9a}}, // 1A 98 2C 7E 45 9A
-		{{0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff}}, // AA BB CC DD EE FF
-		{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00}}  // 00 00 00 00 00 00
-	};
-	log_d("Trying to read RFID data...");
-	
-	String data = "";
+	MFRC522::StatusCode status;
 	MFRC522::PICC_Type type = rfid->PICC_GetType(rfid->uid.sak);
-	
-	uint8_t sectors = 0;
+	uint16_t pageStart = 0;
+	uint16_t pages = 4;
+	uint16_t pageSize = 1;
 	switch(type) {
-		case MFRC522Constants::PICC_TYPE_MIFARE_MINI: sectors = 5; break;
-		case MFRC522Constants::PICC_TYPE_MIFARE_1K: sectors = 16; break;
-		case MFRC522Constants::PICC_TYPE_MIFARE_4K: sectors = 40; break;
-		default: log_i("Unknown PICC type %s\n", String(MFRC522Debug::PICC_GetTypeName(type)).c_str());
-	}
-	sectors = 2; // Pretend we have only two sectors, so we read only sector #1.
-	for (uint8_t sector=1; sector<sectors; sector++) {
-		uint8_t blocks = (sector < 32) ? 4 : 16;
-		uint8_t block_offset = (sector < 32) ? sector * 4 : 128 + (sector - 32) * 16;
-		
-		MFRC522::StatusCode status;
-
-		for (int i=0; i<8; i++) {
-			MFRC522::MIFARE_Key *k = &keys[i];
-			log_v("Trying MIFARE key %02X %02X %02X %02X %02X %02X...\n", k->keyByte[0], k->keyByte[1], k->keyByte[2], k->keyByte[3], k->keyByte[4], k->keyByte[5]);
-			status = rfid->PCD_Authenticate(MFRC522Constants::PICC_CMD_MF_AUTH_KEY_A, block_offset, k, &rfid->uid);
+		case MFRC522Constants::PICC_TYPE_MIFARE_MINI:
+		case MFRC522Constants::PICC_TYPE_MIFARE_1K:
+		case MFRC522Constants::PICC_TYPE_MIFARE_4K: {
+			log_v("Trying to authenticate Mifare card.");
+			MFRC522::MIFARE_Key key = {0xD3, 0xF7, 0xD3, 0xF7, 0xD3, 0xF7};
+			status = rfid->PCD_Authenticate(MFRC522Constants::PICC_CMD_MF_AUTH_KEY_A, 4, &key, &rfid->uid);
 			if (status == MFRC522Constants::STATUS_OK) {
-				log_v("Authentication succeeded with key #%d\n", i);
-				break;
+				log_v("Authentication succeeded.");
+			} else {
+				log_v("Authentication failed. Trying to read anyway.");
 			}
+			pageStart = 4;
+			break;
 		}
-		for (uint8_t block=0; block<blocks-1; block++) {
-			byte buffer[18];
-			uint8_t byte_count = 18;
-			status = rfid->MIFARE_Read(block_offset + block, buffer, &byte_count);
-			if (status != MFRC522Constants::STATUS_OK) {
-				log_d("MIFARE_Read() failed: %s\n", String(MFRC522Debug::GetStatusCodeName(status)).c_str());
-				continue;
-			}
-			for (int i=0; i<16; i++) {
-				if (buffer[i]>=0x20 && buffer[i]<0x7F) data.concat((char)buffer[i]);
-			}
+		case MFRC522Constants::PICC_TYPE_MIFARE_UL:
+			log_v("PICC type is Mifare Ultralight. No authentication necessary.");
+			pages = 16;
+			pageSize = 4;
+			break;
+		default:
+			log_v("Unexpected rfid card type %s. Trying to read anyway.", MFRC522Debug::PICC_GetTypeName(type));
+	}
+	String data = "";
+	for (uint8_t block=pageStart; block<pages+pageStart; block+=pageSize) {
+		byte buffer[18];
+		uint8_t byte_count = 18;
+		status = rfid->MIFARE_Read(block, buffer, &byte_count);
+		if (status != MFRC522Constants::STATUS_OK) {
+			log_d("MIFARE_Read() failed: %s\n", String(MFRC522Debug::GetStatusCodeName(status)).c_str());
+			continue;
+		}
+		for (int i=0; i<16; i++) {
+			if (buffer[i]>=0x20 && buffer[i]<0x7F) data.concat((char)buffer[i]);
 		}
 	}
-	
-	//_rfid->PICC_HaltA();
 	rfid->PCD_StopCrypto1();
-	log_d("Data from RFID: %s\n", data.c_str());
+	log_v("Read rfid data: '%s'", data.c_str());
 	return data;
 }
 

From 13e62fea190d61f4ffb175e87876a338cf6f4b6c Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Mon, 22 Aug 2022 13:59:00 +0200
Subject: [PATCH 17/20] Shuffle the playlist before playing if "[random]" is in
 the rfid data.

---
 include/controller.h | 4 ++--
 include/playlist.h   | 1 +
 src/controller.cpp   | 8 ++++++--
 src/playlist.cpp     | 4 ++++
 4 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/include/controller.h b/include/controller.h
index b9892cc..a4d6fdb 100644
--- a/include/controller.h
+++ b/include/controller.h
@@ -19,13 +19,13 @@ class Controller {
 	unsigned long button_pressed_since = 0;
 	bool button_already_processed = false;
 	String read_rfid_data();
-	
+
 	public:
 	void handle();
 	void next_track();
 	void prev_track();
 	void play();
-	void play(String rfid_id);
+	void play(String rfid_id, bool shuffle=false);
 	void stop();
 	void eof_mp3();
 };
\ No newline at end of file
diff --git a/include/playlist.h b/include/playlist.h
index 4bd5731..1edbfce 100644
--- a/include/playlist.h
+++ b/include/playlist.h
@@ -22,4 +22,5 @@ class Playlist {
 	void restart();
 	void set_current_time(uint32_t time);
 	uint32_t get_current_time();
+	void shuffle();
 };
diff --git a/src/controller.cpp b/src/controller.cpp
index 90e424a..7c874f9 100644
--- a/src/controller.cpp
+++ b/src/controller.cpp
@@ -67,7 +67,7 @@ void Controller::handle_rfid() {
 
 					String data = read_rfid_data();
 
-					play(s_uid);
+					play(s_uid, data.indexOf("[random]")>=0);
 				}
 				rfid->PICC_HaltA();
 			}
@@ -123,10 +123,14 @@ String Controller::read_rfid_data() {
 	return data;
 }
 
-void Controller::play(String rfid_id) {
+void Controller::play(String rfid_id, bool shuffle) {
 	if (!rfid_id.equals(current_playlist.get_rfid_id())) {
 		if (pm->has_playlist(rfid_id)) {
 			current_playlist = pm->get_playlist(rfid_id);
+			if (shuffle) {
+				log_i("Shuffling the playlist.");
+				current_playlist.shuffle();
+			}
 			play();
 		} else {
 			Serial.printf("There is no playlist for rfid_id %s\n", rfid_id.c_str());
diff --git a/src/playlist.cpp b/src/playlist.cpp
index ae7daab..f6aa218 100644
--- a/src/playlist.cpp
+++ b/src/playlist.cpp
@@ -59,4 +59,8 @@ void Playlist::set_current_time(uint32_t pos) {
 
 uint32_t Playlist::get_current_time() {
 	return current_time;
+}
+
+void Playlist::shuffle() {
+	std::random_shuffle(files.begin(), files.end());
 }
\ No newline at end of file

From 076a6993c7ca0777d1ccc02b07e54f1467dcd478 Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Thu, 25 Aug 2022 14:48:25 +0200
Subject: [PATCH 18/20] FTP-Server for managing the contents of the sd card.

---
 platformio.ini | 3 ++-
 src/esmp3.cpp  | 6 +++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/platformio.ini b/platformio.ini
index 7b81aee..33b7be4 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -24,10 +24,11 @@ lib_deps =
 	${extra.lib_deps}
 	esphome/ESP32-audioI2S@^2.1.0
 	computer991/Arduino_MFRC522v2@^2.0.1
+	https://github.com/dplasa/FTPClientServer
 ;upload_port = 10.10.2.108
 monitor_speed = 115200
 monitor_port = /dev/cu.usbserial-0001
-monitor_filters = time, esp32_exception_decoder
+monitor_filters = esp32_exception_decoder
 
 [env:deploy]
 platform = espressif32
diff --git a/src/esmp3.cpp b/src/esmp3.cpp
index 8aeb14a..4a4e27c 100644
--- a/src/esmp3.cpp
+++ b/src/esmp3.cpp
@@ -13,11 +13,13 @@
 #include <MFRC522Debug.h>
 #include <Arduino.h>
 #include <Wire.h>
+#include <FTPServer.h>
 
 Controller controller;
 Audio audio;
 PlaylistManager* pm;
 MFRC522* rfid;
+FTPServer ftp(SD);
 
 void setup() {
 	pinMode(PIN_CS_SD, OUTPUT);		digitalWrite(PIN_CS_SD, HIGH);
@@ -92,13 +94,15 @@ void setup() {
 	Serial.println("Setup finished.");
 
 	audio.setVolume(12);
-	audio.connecttospeech("Die Papabox ist nun einsatzbereit!", "de_DE");
+
+	ftp.begin("", "");
 }
 
 void loop() {
 	ArduinoOTA.handle();
 	controller.handle();
 	audio.loop();
+	ftp.handleFTP();
 }
 
 void audio_info(const char *info){

From b2cf9d62771c9c6d5a36e3eb2a29d6680c83bed9 Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Thu, 25 Aug 2022 14:51:18 +0200
Subject: [PATCH 19/20] Systeminfos werden via mp3-Dateien in /system
 abgespielt.

---
 README.md            | 178 ++-----------------------------------------
 include/controller.h |   2 +-
 src/controller.cpp   |  16 +++-
 src/esmp3.cpp        |   3 +-
 4 files changed, 23 insertions(+), 176 deletions(-)

diff --git a/README.md b/README.md
index 2d9787f..7a75651 100644
--- a/README.md
+++ b/README.md
@@ -1,174 +1,8 @@
 # ESMP3
 
-## What you need
-Please note: This list is a "things I used", neither
-"these are the best things for this stuff" nor "you
-can only use these things". But please be aware that
-using other stuff may lead to you having to make
-more or less easy modifications.
-
-Prizes are more or less the cheapest I could find on
-Aliexpress.
-
-| What? | For what? | Price (approx) |
-|-------|-----------|----------------|
-| ESP-32-WROOM-32D | Controlling everything |   4€ |
-| WS1053B on a PCB with SD card slot | Play the MP3 files; provide an SD card slot |   5€ |
-| MFRC522 | RFID reader |   1€ |
-| 5V Amplifier(s) (e.g. 2x PAM-8302) | Single-channel Amplifier |   2€ |
-| Speaker(s) matching your amp (e.g. 2pcs 4 Ohm 5W) | Enabling you to hear the sounds |   4€ |
-| RFID tags (ISO14443A) - e.g. 10 cards | You can also get Keyfobs or stickers |   4€ |
-| 4 buttons | Prev/Next track, Volume up/down |   1€ |
-
-You'all also need an SD card, some breadboard(s), jumper cables and a soldering iron.
-Also, some kind of box for the finished player.
-
-## How to connect
-
-Schematics coming soon...ish...
-
-## How to install
-
-Format your SD card with FAT32 and put files on it: Every album has
-to go into its own folder in the root of the SD card. Folders and files
-should not contain special characters (meaning stuff like äöüß). Spaces
-and dashes an alike are okay. Put the SD card into the SD card slot.
-
-Copy `include/config.sample.h` to `include/config.h`. Modify it to at
-least contain the correct login details for your WiFi.
-
-The code then should compile in PlatformIO without errors. Upload it
-to your ESP32. After that, upload static files using PlatformIO's task
-"Upload file system image".
-
-The serial console in PlatformIO should give you more or less useful
-messages about what's going on. There will also be a line saying
-"WiFi connected. IP address: xxx.xxx.xxx.xxx" when the connection to
-your WiFi succeeded.
-
-In your browser, enter "http://xxx.xxx.xxx.xxx/" (using the IP address)
-from above. From there you can define mappings between RFID tag IDs and
-folders on the SD card.
-
-## RFID-folder-mappings
-
-### Via webinterface
-
-To create a new mapping between an RFID tag and an folder, you can use
-the web interface. Click the button with the cogs icon. After putting
-your rfid tag on the reader (and possibly removing it again), its ID
-will be shown in the dialog. Click the button with the arrows behind
-the ID to start the mapping mode.
-
-The dialog showing all folders with media files will be shown. Click the
-button with the arrows behind the correct folder, to create the mapping.
-
-### Manually
-
-Mapping are stored on the SD card in the file `/_mapping.txt`. Every
-mapping goes on its own line. Lines should be separated by \n (Unix-
-style line endings); the last line should also end with a newline.
-
-Format of a line is `<RFID id>=<folder>`. RFID id is the UID of an
-RFID tag, expressed as 8 lowercase characters with leading 0 (if
-necessary). Folder is the foldername to play; starting with a slash and
-ending without one.
-
-A valid `_mapping.txt` could look like this:
-
-```
-1a2b3c4d=/Christmas Music Vol. 17
-003aab7f=/Let it go
-b691a22c=/Frozen Audiobook
-22cb6ae9=/Let it go
-
-```
-
-(Yes, more than one tag can map to a folder.)
-
-## Technical details
-
-### Ports
-
-| Device | Port | Connected to |
-| ------ | ---- | ------------ |
-| VS1053 | CS | 16 |
-| VS1053 | MISO | 19 |
-| VS1053 | MOSI | 23 |
-| VS1053 | SCK | 18 |
-| VS1053 | XCS | 4 |
-| VS1053 | XRESET | 0 |
-| VS1053 | XDCS | 2 |
-| VS1053 | DREQ | 15 |
-| RC522 | SDA | 17 |
-| RC522 | SCK | 18 |
-| RC522 | MOSI | 23 |
-| RC522 | MISO | 19 |
-| AMP_L | SD | 27 |
-| AMP_R | SD | 26 |
-| BTN_PREV | | 22 |
-| BTN_NEXT | | 33 |
-| BTN_VOL_UP | | 21 |
-| BTN_VOL_DOWN | | 32 |
-
-Buttons pull to GND if pushed -> Internal Pull-Up needed!
-
-### RFID tags
-The mapping of rfid tags to files uses the ID of the
-tag. A file called `_mapping.txt` in the root folder of
-the SD card defines the mappings between RFID tag ids and
-folders to play.
-
-The easiest way to create this file is to use the mapping
-functionality of the webinterface.
-
-#### Special modes
-You can also save data on the tags to further manipulate
-the system. Position of the data is irrelevant, the whole
-tag will be searched.
-
-Using `[random]` will play the files in a random order.
-`[random:2]` will randomize everything except the first 2
-files. This can be useful for having the favorite song of
-your kids playing, but after that getting a bit of randomness.
-
-Using `[lock]` will turn this key into a key for the locking
-mode. Scanning the tag enables locking mode. The next album
-started will keep running until the end. Removing the tag
-will be deactivated, as are the buttons for prev and next
-track. You can disable locking mode by again scanning the
-lock tag again.
-
-`[advent]` is used for christmas time. An album with this tag
-will only play in December. On December 1st, only track 1
-will play. On December 2nd, track 2 followed by track 1. On
-December 3rd, tracks 3, 1 and 2. From December 24th on, track
-24 followed by tracks 1-23. So your kid will get the "daily track"
-first, followed by all previous tags in the right order.
-
-#### API
-You can send commands to ESMP3 using three different ways:
-* Through a websocket connection to `ws://<IP>/ws`.
-* Through the serial console using an USB cable.
-* Via HTTP POST request to `http://<IP>/cmd`, having the
-  command in the variable `cmd`.
-
-Supported commands are:
-| Command | Action |
-|---------|--------|
-| `play <PATH>` | Starts playing the given path. Path may be a path on the
-sd card or a http(s) URL of a webstream (direct links to mp3/4/ogg streams,
-PLS files, M3U files or podcast XML feeds are supported). |
-| `play` | Continues playing the previously played thing. |
-| `stop` | Stops playing. |
-| `volume=<X>` | Sets the volume to X (0-255). |
-| `track_prev` | Starts the previous track, if available. |
-| `track_next` | Starts the next track, if available. |
-| `track=<X>` | Starts playing track no. X of the currently playing album. |
-| `reset_vs1053` | Resets the VS1053 audio chip. |
-| `reboot` | Reboots ESMP3. |
-| `add_mapping=<ID>=<PATH>` | Adds a mapping between RFID card <ID> and path
-<PATH>. See `play` for valid path formats. |
-| `update` | Runs an update check. |
-| `debug=<0|1>` | Enables / disables debug messages. This value is persisted across reboots. |
-| `trace=<0|1>` | Enables / disables tracing messages. This value is also persisted across reboots. |
\ No newline at end of file
+## Audio files
+System messages are created using:
+  * https://ttsmp3.com/
+  * German / Vicki
+  * "Dies ist ein Text.<break time="1s"/>"
+  * Download as MP3.
\ No newline at end of file
diff --git a/include/controller.h b/include/controller.h
index a4d6fdb..428558a 100644
--- a/include/controller.h
+++ b/include/controller.h
@@ -27,5 +27,5 @@ class Controller {
 	void play();
 	void play(String rfid_id, bool shuffle=false);
 	void stop();
-	void eof_mp3();
+	void eof_mp3(String info);
 };
\ No newline at end of file
diff --git a/src/controller.cpp b/src/controller.cpp
index 7c874f9..acde59a 100644
--- a/src/controller.cpp
+++ b/src/controller.cpp
@@ -134,6 +134,9 @@ void Controller::play(String rfid_id, bool shuffle) {
 			play();
 		} else {
 			Serial.printf("There is no playlist for rfid_id %s\n", rfid_id.c_str());
+			// This is working more or less, but downloading files is really, REALLY slow. (About 4 minutes for 10 MBytes).
+			//download_album(rfid_id);
+			audio.connecttoFS(SD, "/system/sys_unknown_card.mp3");
 		}
 	} else {
 		if (!audio.isRunning()) {
@@ -150,6 +153,11 @@ void Controller::play() {
 		audio.connecttoFS(SD, file.c_str(), current_playlist.get_current_time());
 	} else if (file.startsWith("http")) {
 		log_i("Playing URL %s via connecttohost", file.c_str());
+		audio.connecttoFS(SD, "/system/sys_connecting.mp3");
+		while (audio.isRunning()) {
+			yield();
+			audio.loop();
+		}
 		audio.connecttohost(file.c_str());
 	}
 }
@@ -202,8 +210,12 @@ bool Controller::is_button_pressed(uint8_t pin) {
 	return false;
 }
 
-void Controller::eof_mp3() {
+void Controller::eof_mp3(String info) {
 	log_d("Handling eof. Keep playing until the file is finished.");
 	while(audio.isRunning()) { audio.loop(); yield; }
-	next_track();
+	if (info.startsWith("sys_")) {
+		log_d("File ending was a system audio file. Not running next_track.");
+	} else {
+		next_track();
+	}
 }
\ No newline at end of file
diff --git a/src/esmp3.cpp b/src/esmp3.cpp
index 4a4e27c..6e6ef99 100644
--- a/src/esmp3.cpp
+++ b/src/esmp3.cpp
@@ -94,6 +94,7 @@ void setup() {
 	Serial.println("Setup finished.");
 
 	audio.setVolume(12);
+	audio.connecttoFS(SD, "/system/sys_ready.mp3");
 
 	ftp.begin("", "");
 }
@@ -113,7 +114,7 @@ void audio_id3data(const char *info){  //id3 metadata
 }
 void audio_eof_mp3(const char *info){  //end of file
     Serial.print("eof_mp3     ");Serial.println(info);
-	controller.eof_mp3();
+	controller.eof_mp3(info);
 }
 void audio_showstation(const char *info){
     Serial.print("station     ");Serial.println(info);

From 913a64d46539ca4db922cb1e124862b7bcad974a Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Thu, 25 Aug 2022 14:52:12 +0200
Subject: [PATCH 20/20] Die Position in einer Playlist beilbt beibehalten,
 solange die Papabox nicht neu gestartet wird.

---
 include/controller.h         |  1 +
 include/persisted_playlist.h |  9 +++++++++
 include/playlist.h           |  8 ++++++--
 include/playlist_manager.h   |  6 +++++-
 src/controller.cpp           |  5 +++++
 src/playlist.cpp             | 24 ++++++++++++++++++++----
 src/playlist_manager.cpp     | 17 ++++++++++++++---
 7 files changed, 60 insertions(+), 10 deletions(-)
 create mode 100644 include/persisted_playlist.h

diff --git a/include/controller.h b/include/controller.h
index 428558a..1d7f7ef 100644
--- a/include/controller.h
+++ b/include/controller.h
@@ -15,6 +15,7 @@ class Controller {
 	bool is_rfid_present = false;
 	unsigned long last_rfid_check = 0;
 	unsigned long last_button_check = 0;
+	unsigned long last_position_save = 0;
 	uint8_t button_pressed = 0;
 	unsigned long button_pressed_since = 0;
 	bool button_already_processed = false;
diff --git a/include/persisted_playlist.h b/include/persisted_playlist.h
new file mode 100644
index 0000000..d16ea28
--- /dev/null
+++ b/include/persisted_playlist.h
@@ -0,0 +1,9 @@
+#pragma once
+
+
+struct PersistedPlaylist {
+	String dir;
+	uint16_t file = 0;
+	uint32_t position = 0;
+	PersistedPlaylist(String s="") : dir(s) {}
+};
\ No newline at end of file
diff --git a/include/playlist.h b/include/playlist.h
index 1edbfce..6edb34e 100644
--- a/include/playlist.h
+++ b/include/playlist.h
@@ -2,17 +2,19 @@
 
 #include <vector>
 #include <Arduino.h>
+#include "persisted_playlist.h"
 
 class Playlist {
 	private:
 	std::vector<String> files;
 	uint8_t current_file = 0;
 	uint32_t current_time = 0;
-	void set_current_position(uint8_t file, uint32_t position=0);
 	String rfid_id;
+	PersistedPlaylist* pp;
 
 	public:
-	Playlist(String rfid_id="");
+	Playlist();
+	Playlist(String rfid_id, PersistedPlaylist* p);
 	void add_file(String filename);
 	void sort();
 	String get_rfid_id();
@@ -23,4 +25,6 @@ class Playlist {
 	void set_current_time(uint32_t time);
 	uint32_t get_current_time();
 	void shuffle();
+	void set_current_position(uint8_t file, uint32_t position=0);
+	void save_current_position(uint32_t position=0);
 };
diff --git a/include/playlist_manager.h b/include/playlist_manager.h
index ab07ad2..52e1289 100644
--- a/include/playlist_manager.h
+++ b/include/playlist_manager.h
@@ -4,6 +4,9 @@
 #include <map>
 #include <Arduino.h>
 #include "playlist.h"
+#include "persisted_playlist.h"
+
+class Playlist;
 
 class PlaylistManager {
 	private:
@@ -13,9 +16,10 @@ class PlaylistManager {
 
 	public:
 	PlaylistManager();
-	std::map<String, String> map;
+	std::map<String, PersistedPlaylist> map;
 	Playlist get_playlist(String rfid_id);
 	bool has_playlist(String rfid_id);
 	Playlist current_playlist;
 	void set_audio_current_time(uint32_t time);
+	String pp_to_String();
 };
\ No newline at end of file
diff --git a/src/controller.cpp b/src/controller.cpp
index acde59a..91e033b 100644
--- a/src/controller.cpp
+++ b/src/controller.cpp
@@ -10,6 +10,11 @@ void Controller::handle() {
 		handle_buttons();
 		last_button_check = millis();
 	}
+	if (last_position_save + 10000 < millis() || last_position_save > millis()) {
+		current_playlist.save_current_position(audio.getFilePos());
+		last_position_save = millis();
+		//Serial.println(pm->pp_to_String().c_str());
+	}
 }
 
 void Controller::handle_buttons() {
diff --git a/src/playlist.cpp b/src/playlist.cpp
index f6aa218..0218467 100644
--- a/src/playlist.cpp
+++ b/src/playlist.cpp
@@ -1,7 +1,10 @@
 #include "playlist.h"
 
-Playlist::Playlist(String id) {
+Playlist::Playlist() {}
+
+Playlist::Playlist(String id, PersistedPlaylist* p) {
 	rfid_id = id;
+	pp = p;
 }
 
 String Playlist::get_rfid_id() {
@@ -16,9 +19,22 @@ void Playlist::sort() {
 	std::sort(files.begin(), files.end());
 }
 
-void Playlist::set_current_position(uint8_t file, uint32_t seconds) {
+void Playlist::set_current_position(uint8_t file, uint32_t bytes) {
+	log_d("Setting position: File %d, bytes %d.", file, bytes);
 	current_file = file;
-	current_time = seconds;
+	current_time = bytes;
+	save_current_position();
+}
+
+void Playlist::save_current_position(uint32_t position) {
+	if (position==0) {
+		position = current_time;
+	}
+	log_d("Saving current position: File %d, bytes %d.", current_file, position);
+	if (pp != NULL) {
+		pp->file = current_file;
+		pp->position = position;
+	}
 }
 
 String Playlist::get_current_file_name() {
@@ -54,7 +70,7 @@ void Playlist::restart() {
 }
 
 void Playlist::set_current_time(uint32_t pos) {
-	current_time = pos;
+	set_current_position(current_file, pos);
 }
 
 uint32_t Playlist::get_current_time() {
diff --git a/src/playlist_manager.cpp b/src/playlist_manager.cpp
index 75f2776..643ec12 100644
--- a/src/playlist_manager.cpp
+++ b/src/playlist_manager.cpp
@@ -23,7 +23,7 @@ PlaylistManager::PlaylistManager() {
 				String rfid_id = data.substring(0, eq);
 				String folder = data.substring(eq + 1);
 				Serial.printf("  Adding mapping: %s=>%s\n", rfid_id.c_str(), folder.c_str());
-				map[rfid_id] = folder;
+				map[rfid_id] = PersistedPlaylist(folder);
 			}
 		}
 		f.close();
@@ -38,8 +38,10 @@ Playlist PlaylistManager::get_playlist(String rfid_id) {
 			Serial.printf("No known playlist for id %s.\n", rfid_id);
 			return current_playlist;
 		} else {
-			current_playlist = Playlist(rfid_id);
-			String path = map[rfid_id];
+			PersistedPlaylist* ap = &(map[rfid_id]);
+			log_d("PP status is: File %d, bytes %d.", ap->file, ap->position);
+			current_playlist = Playlist(rfid_id, ap);
+			String path = ap->dir;
 			if (path.startsWith("/")) {
 				File dir = SD.open(path);
 				while(File entry = dir.openNextFile()) {
@@ -54,6 +56,7 @@ Playlist PlaylistManager::get_playlist(String rfid_id) {
 					entry.close();
 				}
 				dir.close();
+				current_playlist.set_current_position(ap->file, ap->position);
 			} else if (path.startsWith("http")) {
 				Serial.printf("Adding URL %s to the list of files\n", path.c_str());
 				current_playlist.add_file(path);
@@ -71,4 +74,12 @@ void PlaylistManager::set_audio_current_time(uint32_t time) {
 
 bool PlaylistManager::has_playlist(String rfid_id) {
 	return map.count(rfid_id) == 1;
+}
+
+String PlaylistManager::pp_to_String() {
+	String s = "";
+	for(const auto& kv : map) {
+		s += kv.first + "=" + kv.second.file + "," + kv.second.position + '\n';
+	}
+	return s;
 }
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