Merge branch 'develop'

2019-11-30 00:06:56 +01:00 · 2019-11-30 00:06:56 +01:00 · f73d45404f
commit f73d45404f
parent 3b0410f560 ecc7c46b8d
20 changed files with 511 additions and 94 deletions
--- a/DEPLOY.md
+++ b/DEPLOY.md
@ -0,0 +1,3 @@
+# Deploying a new version
+
+* Use `deploy.sh`.
--- a/README.md
+++ b/README.md
@ -145,3 +145,28 @@ 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. |
--- a/deploy.sh
+++ b/deploy.sh
@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+set -x
+#set -e
+
+if ! git diff-index --quiet HEAD ; then
+	echo "Git isn't clean. Cant deploy."
+	exit 1
+fi
+
+branch_name=$(git symbolic-ref -q HEAD)
+branch_name=${branch_name##refs/heads/}
+branch_name=${branch_name:-HEAD}
+
+if [ "$branch_name" != "master" ]; then
+	echo "We are not on master branch. Can't deploy."
+	exit 1
+fi
+
+echo
+echo
+echo "Last tags:"
+vers=`git tag --sort=-version:refname | head -n 5`
+while read version; do
+	echo "  $version"
+done <<< "$vers"
+
+read -p "Version to generate: " VERSION
+
+OTA_VERSION=`grep "VERSION=" bin/update.manifest | cut -d"=" -f2`
+OTA_VERSION=$(( "$OTA_VERSION" + 1 ))
+
+sed -i.bak "s/#define OTA_VERSION .*/#define OTA_VERSION $OTA_VERSION/" include/config.h include/config.sample.h
+rm include/config.h.bak include/config.sample.h.bak
+
+PLATFORMIO_BUILD_FLAGS='-DVERSION=\"$VERSION\"' pio run -e deploy -t buildprog || exit 1
+
+cp .pio/build/deploy/firmware.bin bin/firmware.bin || exit 1
+
+sed -i.bak "s/VERSION=.*/VERSION=$OTA_VERSION/" bin/update.manifest
+MD5=`md5sum --binary bin/firmware.bin | cut -d" " -f1`
+sed -i.bak "s/IMAGE_MD5=.*/IMAGE_MD5=$MD5/" bin/update.manifest
+rm bin/update.manifest.bak
+
+echo; echo; echo; echo; echo
+echo "Please check the git diff, if everything looks okay:"
+git diff
+
+read -p "Press ENTER to continue, Ctrl-C to abort. " foo
+
+git add bin/firmware.bin bin/update.manifest
+git commit -m "Deploying version $VERSION."
+git tag -a -m "Deploying version $VERSION" $VERSION
+git push --follow-tags
--- a/include/config.sample.h
+++ b/include/config.sample.h
@ -1,13 +1,21 @@
 #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

-#define WIFI_SSID "---CHANGEME---"
-#define WIFI_PASS "---CHANGEME---"
+// 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
--- a/include/controller.h
+++ b/include/controller.h
@ -10,6 +10,8 @@ class Controller;
 #include "playlist.h"
 #include "playlist_manager.h"
 #include "http_server.h"
+
+#undef DEPRECATED
 #include <MFRC522.h>

 enum ControllerState { NORMAL, LOCKING, LOCKED };
@ -32,6 +34,8 @@ private:
 	
 	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);
--- a/include/main.h
+++ b/include/main.h
@ -0,0 +1,5 @@
+#pragma once
+
+void wifi_connect();
+
+extern const uint8_t file_index_html_start[] asm("_binary_src_index_html_start");
--- a/include/playlist.h
+++ b/include/playlist.h
@ -4,9 +4,16 @@
 #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; }
 };
@ -19,12 +26,14 @@ private:
 	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();
@ -34,9 +43,12 @@ public:
 	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();
-	String get_current_file();
+	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);
--- a/include/playlist_manager.h
+++ b/include/playlist_manager.h
@ -20,4 +20,5 @@ public:
 	String json();
 	bool add_mapping(String id, String folder);
 	String create_mapping_txt();
+	void persist(Playlist* p);
 };
--- a/include/updater.h
+++ b/include/updater.h
@ -0,0 +1,10 @@
+#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);
+};
--- a/partitions.csv
+++ b/partitions.csv
@ -0,0 +1,6 @@
+# Custom partition table without SPIFFS.
+# Name,   Type, SubType, Offset,  Size, Flags
+nvs,      data, nvs,     0x9000,  0x5000,
+otadata,  data, ota,     0xe000,  0x2000,
+app0,     app,  ota_0,   0x10000, 0x220000,
+app1,     app,  ota_1,   0x230000,0x220000,
--- a/platformio.ini
+++ b/platformio.ini
@ -8,16 +8,33 @@
 ; Please visit documentation for the other options and examples
 ; https://docs.platformio.org/page/projectconf.html

+[platformio]
+default_envs = esp32
+
+[extra]
+lib_deps =
+	63 ; MFRC522
+	https://github.com/me-no-dev/ESPAsyncWebServer.git
+	ArduinoJSON
+	6691 ; TinyXML
+
 [env:esp32]
 platform = espressif32
 board = esp-wrover-kit
 framework = arduino
 upload_speed = 512000
 build_flags=!./build_version.sh
-lib_deps = MFRC522
-	https://github.com/me-no-dev/ESPAsyncWebServer.git
-	ArduinoJSON
-	6691 ; TinyXML
+lib_deps = ${extra.lib_deps}
 upload_port = /dev/cu.SLAB_USBtoUART
-monitor_speed = 74480
+monitor_speed = 115200
+board_build.embed_txtfiles = src/index.html
+;board_build.partitions = partitions.csv
 ;monitor_port = /dev/cu.wchusbserial1420
+
+[env:deploy]
+platform = espressif32
+board = esp-wrover-kit
+framework = arduino
+lib_deps = ${extra.lib_deps}
+board_build.embed_txtfiles = src/index.html
+board_build.partitions = partitions.csv
--- a/src/controller.cpp
+++ b/src/controller.cpp
@ -1,8 +1,10 @@
 #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) {
@ -34,7 +36,6 @@ void Controller::register_http_server(HTTPServer* h) {
 }

 void Controller::loop() {
-	TRACE("Controller::loop()...\n");
 	unsigned long now = millis();
 	if ((_last_rfid_scan_at < now - RFID_SCAN_INTERVAL) || (now < _last_rfid_scan_at)) {
 		_check_rfid();
@ -50,7 +51,20 @@ void Controller::loop() {
 		process_message(_cmd_queue);
 		_cmd_queue = "";
 	}
-	TRACE("Controller::loop() done.\n");
+	
+	#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() {
@ -69,7 +83,7 @@ uint32_t Controller::_get_rfid_card_uid() {
 }

 void Controller::_check_rfid() {
-	TRACE("check_rfid running...\n");
+	//TRACE("check_rfid running...\n");
 	MFRC522::StatusCode status;
 	if (_rfid_present) {
 		byte buffer[2];
@ -128,7 +142,8 @@ void Controller::_check_rfid() {
 				if (time.tm_mon == 11) { // tm_mon is "months since january", so 11 means december.
 					pl->advent_shuffle(time.tm_mday);
 				} else {
-					// TODO
+					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();
@ -184,7 +199,7 @@ String Controller::_read_rfid_data() {
 		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;
@ -228,8 +243,6 @@ String Controller::_read_rfid_data() {
 }

 void Controller::_check_serial() {
-	TRACE("check_serial running...\n");
-
 	if (Serial.available() > 0) {
 		char c = Serial.read();
 		Serial.printf("%c", c);
@ -250,13 +263,8 @@ bool Controller::process_message(String cmd) {
 	if (cmd.startsWith("play ")) {
 		Playlist* p = pm->get_playlist_for_folder(cmd.substring(5));
 		player->play(p);
-	//} else if (cmd.equals("ls")) {
-	//	_execute_command_ls("/");
-	//} else if (cmd.startsWith("ls ")) {
-	//	_execute_command_ls(cmd.substring(3));
 	} else if (cmd.equals("play")) {
 		player->play();
-	
 	} else if (cmd.equals("stop")) {
 		player->stop();
 	} else if (cmd.equals("help")) {
@ -289,6 +297,10 @@ bool Controller::process_message(String cmd) {
 		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 {
 		ERROR("Unknown command: %s\n", cmd.c_str());
 		return false;
@ -317,8 +329,6 @@ void Controller::_execute_command_help() {
 }

 void Controller::_check_buttons() {
-	TRACE("check_buttons running...\n");
-
 	if (BTN_PREV() && _debounce_button(0)) {
 		if (_state == NORMAL) {
 			player->track_prev();
@ -362,6 +372,22 @@ String Controller::json() {
 	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>();
 }

--- a/src/http_client_wrapper.cpp
+++ b/src/http_client_wrapper.cpp
@ -73,6 +73,9 @@ bool HTTPClientWrapper::_request(String method, String url, uint32_t offset, uin
 		return false;
 	}

+	_buffer_position = 0;
+	_buffer_length = 0;
+	
 	_connected = true;
 	_length = _http->getSize() + offset;
 	if (_http->hasHeader("Content-Type")) {
--- a/src/http_server.cpp
+++ b/src/http_server.cpp
@ -1,7 +1,7 @@
 #include "http_server.h"
+#include "main.h"
 #include "spi_master.h"
 #include <ESPmDNS.h>
-#include <SPIFFS.h>

 HTTPServer::HTTPServer(Player* p, Controller* c) {
 	_player = p;
@ -11,14 +11,37 @@ HTTPServer::HTTPServer(Player* p, Controller* c) {
 	_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(SPIFFS, "/index.html", "text/html");});
-	_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) {req->send(200); }, NULL, [&](AsyncWebServerRequest *request, uint8_t *data, size_t len, size_t index, size_t total) {_controller->queue_command((char*)data);});
+	_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);
 }
--- a/data/index.html
+++ b/data/index.html
@ -151,6 +151,7 @@
 						<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">
@ -187,7 +188,7 @@ update_playlist = function(data) {
 		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].substr(data.files[i].title)));
+		tr.append($('<td>').html(data.files[i].title));
 		$('#track_list').append(tr);
 	}
 	
@ -288,6 +289,7 @@ $(function() {
 	$('#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');
--- a/src/main.cpp
+++ b/src/main.cpp
@ -2,14 +2,16 @@
 #include <SPI.h>
 #include <SD.h>
 #include <WiFi.h>
+#include <WiFiMulti.h>
 #include <ESPmDNS.h>
-#include <SPIFFS.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;
@ -18,29 +20,53 @@ HTTPServer* http_server;

 uint8_t SPIMaster::state = 0;

-bool connect_to_wifi(String ssid, String pass) {
-	TRACE("Connecting to wifi \"%s\"...\n", ssid.c_str());
-	WiFi.mode(WIFI_AP_STA);
-	WiFi.begin(ssid.c_str(), pass.c_str());
-	if (WiFi.waitForConnectResult() != WL_CONNECTED) {
-		DEBUG("Could not connect to wifi \"%s\".\n", ssid.c_str());
-		return false;
-	} else {
-		INFO("Connected to \"%s\". IP address: %s\n", ssid.c_str(), WiFi.localIP().toString().c_str());
+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) {
+		DEBUG("Connected to WiFi \"%s\".\n", WiFi.SSID().c_str());
+	} else {
+		DEBUG("No WiFi connection!\n");
 	}
-	return true;
 }

 void setup() {
-	delay(500);
-	Serial.begin(74880);
+	// 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\n", VERSION);
+		INFO("ESMP3 version %s (OTA_VERSION %d)\n", VERSION, OTA_VERSION);
 	#else
-		INFO("ESMP3, version unknown\n");
+		INFO("ESMP3, version unknown (OTA_VERSION %d)\n", OTA_VERSION);
 	#endif
 	INFO("Initializing...\n");

@ -60,9 +86,6 @@ void setup() {
 	}
 	spi->select_sd(false);

-	DEBUG("Starting SPIFFS...\n");
-	SPIFFS.begin(true);
-
 	DEBUG("Initializing PlaylistManager...\n");
 	pm = new PlaylistManager();
 	
@ -71,35 +94,7 @@ void setup() {
    controller = new Controller(player, pm);
    INFO("Player and controller initialized.\n");

-	bool connected = false;
-	INFO("Connecting to WiFi...\n");
-	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 || line.startsWith("#") || line.indexOf('=')==-1) {
-				continue;
-			}
-			String ssid = line.substring(0, line.indexOf('='));
-			String pass = line.substring(line.indexOf('=')+1);
-			connected = connect_to_wifi(ssid, pass);
-			if (connected) break;
-		}
-		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 (!connected) {
-		DEBUG("Trying hardcoded WiFi data...\n");
-		connected = connect_to_wifi(WIFI_SSID, WIFI_PASS);
-	}
-	if (!connected) {
-		INFO("No WiFi connection!\n");
-	}
+    wifi_connect();
 	
 	MDNS.begin("esmp3");

@ -119,6 +114,12 @@ void setup() {
 		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");
 }

--- a/src/player.cpp
+++ b/src/player.cpp
@ -464,14 +464,14 @@ void Player::set_volume(uint8_t vol, bool save) {

 void Player::vol_up() {
 	if (!is_playing()) return;
-	uint8_t vol = _volume + VOLUME_STEP;
+	uint16_t vol = _volume + VOLUME_STEP;
 	if (vol > VOLUME_MAX) vol=VOLUME_MAX;
 	set_volume(vol);
 }

 void Player::vol_down() {
 	if (!is_playing()) return;
-	uint8_t vol = _volume - VOLUME_STEP;
+	int16_t vol = _volume - VOLUME_STEP;
 	if (vol < VOLUME_MIN) vol=VOLUME_MIN;
 	set_volume(vol);
 }
@ -535,7 +535,10 @@ bool Player::play() {
 	if (_current_playlist == NULL) return false;
 	if (_current_playlist->get_file_count()==0) return false;
 	_current_playlist->start();
-	String file = _current_playlist->get_current_file();
+	String file;
+	if (!_current_playlist->get_current_file(&file)) {
+		return false;
+	}
 	uint32_t position = _current_playlist->get_position();
 	_state = playing;
 	_play_file(file, position);
@ -610,6 +613,7 @@ 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;
--- a/src/playlist.cpp
+++ b/src/playlist.cpp
@ -7,7 +7,9 @@
 #include <TinyXML.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);
@ -44,7 +46,7 @@ void Playlist::_add_path(String path) {
 			  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});
+			_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);
@ -75,12 +77,16 @@ void Playlist::_examine_http_url(String url) {
 	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/")) {
-		_files.push_back({.filename=url, .title=url});
+		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());
@ -95,6 +101,7 @@ 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) {
@ -106,8 +113,11 @@ void xmlcb(uint8_t status, char* tagName, uint16_t tagLen, char* data, uint16_t
 	} else if (tag.endsWith("/item") && (status & STATUS_START_TAG)) {
 		xml_title = "";
 		xml_url = "";
+		xml_guid = "";
 	} else if (tag.endsWith("/item/title") && (status & STATUS_TAG_TEXT)) {
 		xml_title = String(data);
+	} else if (tag.endsWith("/item/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("/item/enclosure") && tag.equals("type") && (status & STATUS_ATTR_TEXT) && String(data).indexOf("audio/")>=0) {
@ -125,8 +135,9 @@ void xmlcb(uint8_t status, char* tagName, uint16_t tagLen, char* data, uint16_t
 		xml_enclosure_url = "";
 	} else if (tag.endsWith("/item") && (status & STATUS_END_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->push_back({xml_url, xml_title});
+			xml_files_ptr->insert(xml_files_ptr->begin(), {.filename=xml_url, .title=xml_title, .id=xml_guid});
 		}
 	}
 }
@ -148,6 +159,7 @@ void Playlist::_parse_rss(HTTPClientWrapper* http) {
 	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;
@ -180,7 +192,7 @@ void Playlist::_parse_m3u(HTTPClientWrapper* http) {
 				}
 			} else if (line.startsWith("http")) {
 				if (title.length()==0) title = line;
-				_files.push_back({.filename=line, .title=title});
+				_files.push_back({.filename=line, .title=title, .id="none"});
 				title = "";
 			}
 			line = "";
@ -222,7 +234,7 @@ void Playlist::_parse_pls(HTTPClientWrapper* http) {
 		}

 		if (title.length()>0 && url.length()>0) {
-			_files.push_back({.filename=url, .title=title});
+			_files.push_back({.filename=url, .title=title, .id="none"});
 			last_index = -1;
 			title = "";
 			url = "";
@ -231,6 +243,10 @@ void Playlist::_parse_pls(HTTPClientWrapper* http) {
 	// don't close http at the end
 }

+String Playlist::path() {
+	return _path;
+}
+
 uint16_t Playlist::get_file_count() {
 	return _files.size();
 }
@ -274,6 +290,15 @@ bool Playlist::set_track(uint8_t track) {
 	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;
 }
@ -294,12 +319,19 @@ void Playlist::shuffle(uint8_t random_offset) {
 }

 void Playlist::advent_shuffle(uint8_t day) {
-	if (day > 24) day = 24;
+	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;

-	if (day > _files.size()) return;
 	
 	_files.insert(_files.begin(), _files[day - 1]);
-	_files.erase(_files.begin() + day - 1, _files.end());
+	_files.erase(_files.begin() + day, _files.end());
 }

 void Playlist::reset() {
@ -310,8 +342,20 @@ void Playlist::reset() {
 	_started = false;
 }

-String Playlist::get_current_file() {
-	return _files[_current_track].filename;
+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() {
@ -340,6 +384,7 @@ void Playlist::json(JsonObject json) {
 		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();
--- a/src/playlist_manager.cpp
+++ b/src/playlist_manager.cpp
@ -104,10 +104,40 @@ Playlist* PlaylistManager::get_playlist_for_id(String id) {
 }

 Playlist* PlaylistManager::get_playlist_for_folder(String folder) {
+	Playlist* p;
 	if (!_playlists.count(folder)) {
-		_playlists[folder] = new Playlist(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;
 					}
-	return _playlists[folder];
+				}
+				f.close();
+			}
+			SPIMaster::select_sd(false);
+		}
+	} else {
+		p = _playlists[folder];
+		if (p->persistence == PERSIST_NONE) {
+			p->reset();
+		}
+	}
+	return p;
 }

 void PlaylistManager::dump_ids() {
@ -164,3 +194,46 @@ String PlaylistManager::create_mapping_txt() {
 	}
 	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);
+			}
+			
+			src.close();
+			SD.remove("/_positions.temp.txt");
+		}
+		
+		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());
+	}
+}
--- a/src/updater.cpp
+++ b/src/updater.cpp
@ -0,0 +1,96 @@
+#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;
+}