Arduino source

#include <String.h>;
#include "pitches.h"


//define our variables
int ledPin = 11;
int x = 0;
int oldbreathe;
int slot;
String incomingWord, incomingByte, breathe, postscore;


//defines the melody played and the duration of each note
/////////////////////////////////////////////////////////
int melody[] = {
  NOTE_G4, NOTE_B4, NOTE_D6, NOTE_G5, NOTE_GS4, NOTE_C5, NOTE_DS7, NOTE_GS5, NOTE_AS5, NOTE_D5, NOTE_F6, NOTE_AS5};
int noteDurations[] = {
  32, 32, 32, 32,32,32,32,32,32,32,32,16 };
/////////////////////////////////////////////////////////






void setup() {
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
  breathe = 49;
  slot    = 1;
}


void loop() {

  if (breathe == 49){ // if (breathe = 1) then start breathe math function
    int outVal = yforx(x);
    analogWrite(ledPin, outVal);
    delay(6); // modify the pace of breathing
    x++;
  }
  if (breathe == 48){
    analogWrite(ledPin, 0); // override the LED to OFF if (breathe = 0)
  }

  /////////////////////////////
  /////////////////////////////

  if (Serial.available() > 0) { //If we get a character over the serial line (serial activity)
    incomingByte = Serial.read();

    if (incomingByte == 44){  //44 we received a delimiting comma. dump incomingWord to open array slot
      if (slot > 2){
        slot=1;
      }


      if (slot == 1){
        breathe = incomingWord;
        //        Serial.print("new breathe value: ");
        //        Serial.println(breathe);
        if (breathe == 49){playmusic();}
        slot++;


      }
      else
        if (slot == 2){
        postscore = incomingWord;
        Serial.print("new postscore value: ");
        Serial.println(postscore);
        slot++;
      }


      incomingWord = "";
    }


    else if (incomingByte != 13){ //received normal character. add to word
      incomingWord = incomingWord + incomingByte;
    }

    else
      if (incomingByte == 13){  //13 is carriage return
      slot = 1;
      incomingWord = "";

    }
  }
}


void playmusic() {
  for (int thisNote = 0; thisNote < 12; thisNote++) {
    int noteDuration = 1000/noteDurations[thisNote];
    tone(8, melody[thisNote],noteDuration);
    int pauseBetweenNotes = noteDuration * 1.30;
    delay(pauseBetweenNotes);
    noTone(8);
  }
}



int yforx(int x) {
  return (-240*abs(sin(x*0.01)))+255; //sine wave
}