You can now have INFO output, but not DEBUG output. Added support for commands via Serial.

include/controller.h

@@ -15,6 +15,10 @@ private:
 	uint32_t _last_rfid_card_uid = 0;
 	Player* _player;
 	unsigned long _last_rfid_scan_at = 0;
+	String _serial_buffer = String();
+	void _execute_serial_command(String cmd);
+	void _execute_command_ls(String path);
+	void _execute_command_help();
 public:
 	Controller(Player* p);
 	void loop();