Sparkfun MP3 Trigger via Serial TX2

rseries_sparkfun.h

int mp3Byte = 0;
boolean mp3Playing = false;

void setup() {
	Serial2.begin(38400);
}

void loop() {
	if (Serial2.available()) {
		mp3Byte = Serial2.read();
		if (mp3Byte == 88) { // Sound finished playing
			mp3Playing = false;
		}
	}
}

void playSound(int sample) {
	if (mp3Playing == false) {
		Serial2.write('t');
		Serial2.write(sample);
		mp3Playing = true;
	}
}

void stopSound() {
	if (mp3Playing == true) {
		Serial2.write('O');
		mp3Playing = false;
	}
}