July 16, 2024, 03:21:18 PM

olimexino 32u4 + MOD-MP3-XLITE

Started by ste, March 09, 2015, 09:42:30 PM

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Hi all,
I am trying to control MOD-MP3-XLITE with 32u4.

I have connected two boards with the UEXT cable, 5 volts to XLITE power input, TX & RX jumpers, BAT jumper.
I have one mp3 file on the SD and it works in stand alone mode.
As I understand from the example for OLIMEXINO-328 I have to serial print a command from from my controller to the XLITE board. Here is my sketch:

#define but 7

void setup(){
   pinMode( but, INPUT_PULLUP );
        while (!Serial);

void loop(){
        static boolean key = 0;
   int s = !digitalRead( but );
          if( s && key == 0 )
          Serial.print("pnum 0\r\n");
          key = 1;
   else if ( !s && key == 1 )
          key = 0;


I have also connect the 32u4 to power supply as it was written in the readme file.

What I am doing wrong?
Can anyone help me?

Thanks in advance!