Added sleep mode for VS1053, HTTP server, tar upload, JSON status, RFID card removal debouncing, ...

include/controller.h

@@ -16,6 +16,7 @@ private:
 	void _check_buttons();
 	uint32_t _get_rfid_card_uid();
 	uint32_t _last_rfid_card_uid = 0;
+	uint8_t _no_rfid_card_count = 0;
 	Player* _player;
 	unsigned long _last_rfid_scan_at = 0;
 	String _serial_buffer = String();
@@ -26,5 +27,6 @@ private:
 	bool _check_button(uint8_t btn);
 public:
 	Controller(Player* p, MCP* m);
+	String rfid_uid() { return String(_last_rfid_card_uid, HEX); }
 	void loop();
 };