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

include/config.h

@@ -20,6 +20,8 @@
 #define RX 3
 #define TX 1
 
+#define SHOW_DEBUG
+
 
 #define PIN_SD_CS            D4
 #define PIN_VS1053_XCS        D8
@@ -40,3 +42,14 @@
 #define VOLUME_STEP 0x08
 
 #define RFID_SCAN_INTERVAL 100
+
+
+// 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__)
+#else
+	#define DEBUG(x, ...) while(0) {}
+#endif