MP3 Shield coding

Projects Programming
4

I want the arduino to play music when a push button sends a LOW signal.

  MP3player.playTrack(1);

Why are you telling the device to play the track, in setup()?

      if (digitalRead(buttonPin)== HIGH) {   
Serial.print(F("track001.mp3"));
Serial.println(current_track);
MP3player.playTrack(current_track);
  1. Doesn't look like a LOW to me.
  2. The farting around with "track001.mp3" and printing current_track anonymously do nothing useful.
  void playtime() {
       startingMillis = millis();                                 // set both time counter
       currentMillis = millis();
      while ( currentMillis - startingMillis < playTime ) {      // while track plays, runs until playTime is reached
          currentMillis = millis();                               // set to actual time
          delay(40);                                              // debounce
       }     
   }

A big fat delay()!

When I run this I get no faults, but also no music

Then, you need a really simple sketch. What should loop() look like:

void loop()
{
}

That's right. You do NOTHING in loop(). Not a thing. Make setup() play the track. Do not add any more code until you know that the hardware is working.