S107 IR-RC Helicopter controller via Processing and Arduino Mega. Adapted from http://www.diyphonegadgets.com/2012/04/tutorial-how-to-control-ir-helicopter.html It would be great if someone rewrote the Arduino part in a better way, using timers or one of the IR libraries out there :D

arduino.ino

//Arduino code to control a helicotper.
int IRledPin =  12;    // Connect IR LED to pin 12
int incomingByte = 0;
String incomingString;
int pulseValues[33];
int pulseLength = 0;

void setup()   {                
  // initialize the IR digital pin as an output:
  pinMode(IRledPin, OUTPUT);      
  Serial.begin(9600);

  for (int i=0; i < 33; i++) 
    pulseValues[i] = 0;


}

void loop()                     
{
  SendCode();
}


void pulseIR(long microsecs) {
  cli();  // this turns off any background interrupts

  while (microsecs > 0) {
    // 38 kHz is about 13 microseconds high and 13 microseconds low
    digitalWrite(IRledPin, HIGH);  // this takes about 3 microseconds to happen
    delayMicroseconds(10);         // hang out for 10 microseconds
    digitalWrite(IRledPin, LOW);   // this also takes about 3 microseconds
    delayMicroseconds(10);         // hang out for 10 microseconds

    // so 26 microseconds altogether
    microsecs -= 26;

  }

  sei();  // this turns them back on
}

void Zero()
{  
  pulseIR(300);
  delayMicroseconds(300);
  pulseLength += 600;
}

void One()
{
  pulseIR(300);
  delayMicroseconds(600); 
  pulseLength += 900;
}

void sendPulseValue(int pulseValue)
{
  if (pulseValue == 1)
    One();
  else
    Zero(); 
}

void checkPulseChanges()
{
  if (Serial.available() > 0)
  {
    incomingByte = Serial.read();

    //Pulse 1
    if (incomingByte == 'a')
      pulseValues[0] = 0;
    if (incomingByte == 'A')
      pulseValues[0] = 1;

    //Pulse 2
    if (incomingByte == 'b')
      pulseValues[1] = 0;
    if (incomingByte =='B')
      pulseValues[1] = 1;

    //Pulse 3
    if (incomingByte == 'c')
      pulseValues[2] = 0;
    if (incomingByte == 'C')
      pulseValues[2] = 1;

    //Pulse 4
    if (incomingByte == 'd')
      pulseValues[3] = 0;
    if (incomingByte == 'D')
      pulseValues[3] = 1;

    //Pulse 5
    if (incomingByte == 'e')
      pulseValues[4] = 0;
    if (incomingByte == 'E')
      pulseValues[4] = 1;

    //Pulse 6
    if (incomingByte == 'f')
      pulseValues[5] = 0;
    if (incomingByte == 'F')
      pulseValues[5] = 1;

    //Pulse 7
    if (incomingByte == 'g')
      pulseValues[6] = 0;
    if (incomingByte == 'G')
      pulseValues[6] = 1;    

    //Pulse 8
    if (incomingByte == 'h')
      pulseValues[7] = 0;
    if (incomingByte == 'H')
      pulseValues[7] = 1;

    //Pulse 9
    if (incomingByte == 'i')
      pulseValues[8] = 0;
    if (incomingByte == 'I')
      pulseValues[8] = 1;

    //Pulse 10
    if (incomingByte == 'j')
      pulseValues[9] = 0;
    if (incomingByte == 'J')
      pulseValues[9] = 1;

    //Pulse 11
    if (incomingByte == 'k')
      pulseValues[10] = 0;
    if (incomingByte == 'K')
      pulseValues[10] = 1;

    //Pulse 12
    if (incomingByte == 'l')
      pulseValues[11] = 0;
    if (incomingByte == 'L')
      pulseValues[11] = 1;

    //Pulse 13
    if (incomingByte == 'm')
      pulseValues[12] = 0;
    if (incomingByte == 'M')
      pulseValues[12] = 1;

    //Pulse 14
    if (incomingByte == 'o')
      pulseValues[13] = 0;
    if (incomingByte == 'O')
      pulseValues[13] = 1;

    //Pulse 15
    if (incomingByte == 'p')
      pulseValues[14] = 0;
    if (incomingByte == 'P')
      pulseValues[14] = 1;

    //Pulse 16
    if (incomingByte == 'q')
      pulseValues[15] = 0;
    if (incomingByte == 'Q')
      pulseValues[15] = 1;

    //Pulse 17
    if (incomingByte == 'r')
      pulseValues[16] = 0;
    if (incomingByte == 'R')
      pulseValues[16] = 1;

    //Pulse 18
    if (incomingByte == 's')
      pulseValues[17] = 0;
    if (incomingByte == 'S')
      pulseValues[17] = 1;

    //Pulse 19
    if (incomingByte == 't')
      pulseValues[18] = 0;
    if (incomingByte == 'T')
      pulseValues[18] = 1;

    //Pulse 20
    if (incomingByte == 'u')
      pulseValues[19] = 0;
    if (incomingByte == 'U')
      pulseValues[19] = 1;

    //Pulse 21
    if (incomingByte == 'v')
      pulseValues[20] = 0;
    if (incomingByte == 'V')
      pulseValues[20] = 1;

    //Pulse 22
    if (incomingByte == 'w')
      pulseValues[21] = 0;
    if (incomingByte == 'W')
      pulseValues[21] = 1;

    //Pulse 23
    if (incomingByte == 'x')
      pulseValues[22] = 0;
    if (incomingByte == 'X')
      pulseValues[22] = 1;

    //Pulse 24
    if (incomingByte == 'y')
      pulseValues[23] = 0;
    if (incomingByte == 'Y')
      pulseValues[23] = 1;

    //Pulse 25
    if (incomingByte == 'z')
      pulseValues[24] = 0;
    if (incomingByte == 'Z')
      pulseValues[24] = 1;

    //Pulse 26
    if (incomingByte == '1')
      pulseValues[25] = 0;
    if (incomingByte == '2')
      pulseValues[25] = 1;

    //Pulse 27
    if (incomingByte == '3')
      pulseValues[26] = 0;
    if (incomingByte == '4')
      pulseValues[26] = 1;

    //Pulse 28
    if (incomingByte == '5')
      pulseValues[27] = 0;
    if (incomingByte == '6')
      pulseValues[27] = 1;

    //Pulse 29
    if (incomingByte == '7')
      pulseValues[28] = 0;
    if (incomingByte == '8')
      pulseValues[28] = 1;

    //Pulse 30
    if (incomingByte == '9')
      pulseValues[29] = 0;
    if (incomingByte == '!')
      pulseValues[29] = 1;

    //Pulse 31
    if (incomingByte == '@')
      pulseValues[30] = 0;
    if (incomingByte == '#')
      pulseValues[30] = 1;

    //Pulse 32
    if (incomingByte == '$')
      pulseValues[31] = 0;
    if (incomingByte == '%')
      pulseValues[31] = 1;

    //Pulse 33
    if (incomingByte == '^')
      pulseValues[32] = 0;
    if (incomingByte == '&')
      pulseValues[32] = 1; 
 
  }

}

void SendCode() {

  while (true)
  {
    checkPulseChanges();

    pulseIR(4000);
    delayMicroseconds(2000);
    pulseLength=6000;

    sendPulseValue(pulseValues[0]);
    sendPulseValue(pulseValues[1]);
    sendPulseValue(pulseValues[2]);
    sendPulseValue(pulseValues[3]);
    sendPulseValue(pulseValues[4]);
    sendPulseValue(pulseValues[5]);
    sendPulseValue(pulseValues[6]);
    sendPulseValue(pulseValues[7]);
    sendPulseValue(pulseValues[8]);
    sendPulseValue(pulseValues[9]);
    sendPulseValue(pulseValues[10]);
    sendPulseValue(pulseValues[11]);
    sendPulseValue(pulseValues[12]);
    sendPulseValue(pulseValues[13]);
    sendPulseValue(pulseValues[14]);
    sendPulseValue(pulseValues[15]);
    sendPulseValue(pulseValues[16]);
    sendPulseValue(pulseValues[17]);
    sendPulseValue(pulseValues[18]);
    sendPulseValue(pulseValues[19]);
    sendPulseValue(pulseValues[20]);
    sendPulseValue(pulseValues[21]);
    sendPulseValue(pulseValues[22]);
    sendPulseValue(pulseValues[23]);
    sendPulseValue(pulseValues[24]);
    sendPulseValue(pulseValues[25]);
    sendPulseValue(pulseValues[26]);
    sendPulseValue(pulseValues[27]);
    sendPulseValue(pulseValues[28]);
    sendPulseValue(pulseValues[29]);
    sendPulseValue(pulseValues[30]);
    sendPulseValue(pulseValues[31]);

    //Footer
    pulseIR(360); 
    delayMicroseconds( (28600 - pulseLength) ); 
    delay(20);
   } 
}

processing.pde

import controlP5.*;

import processing.serial.*; 
import controlP5.*;

ControlP5 controlP5;
CheckBox checkbox;
Button b;

float boxX;
float boxY;
int boxSize = 20;
boolean mouseOverBox = false;
byte[] previousFlags = new byte[32];
byte[] flagsToSend = new byte[32];
Serial port; 
String outString;

int helicopterUpSpeed = 0;
int helicopterPitch = 63;
int helicopterYaw = 68;

void setup() {
  size(640, 480);

  controlP5 = new ControlP5(this);
  checkbox = controlP5.addCheckBox("checkBox", 20, 20);  
  // make adjustments to the layout of a checkbox.
  checkbox.setColorForeground(color(120));
  checkbox.setColorActive(color(255));
  checkbox.setColorLabel(color(128));
  checkbox.setItemsPerRow(8);
  checkbox.setSpacingColumn(30);
  checkbox.setSpacingRow(10);
  // add items to a checkbox.
  checkbox.addItem("1", 0);
  checkbox.addItem("2", 0);
  checkbox.addItem("3", 0);
  checkbox.addItem("4", 0);
  checkbox.addItem("5", 0);
  checkbox.addItem("6", 0);
  checkbox.addItem("7", 0);
  checkbox.addItem("8", 0);
  checkbox.addItem("9", 0);
  checkbox.addItem("10", 0);
  checkbox.addItem("11", 0);
  checkbox.addItem("12", 0);
  checkbox.addItem("13", 0);
  checkbox.addItem("14", 0);
  checkbox.addItem("15", 0);
  checkbox.addItem("16", 0);
  checkbox.addItem("17", 0);
  checkbox.addItem("18", 0);
  checkbox.addItem("19", 0);
  checkbox.addItem("20", 0);
  checkbox.addItem("21", 0);
  checkbox.addItem("22", 0);
  checkbox.addItem("23", 0);
  checkbox.addItem("24", 0);
  checkbox.addItem("25", 0);
  checkbox.addItem("26", 0);
  checkbox.addItem("27", 0);
  checkbox.addItem("28", 0);
  checkbox.addItem("29", 0);
  checkbox.addItem("30", 0);
  checkbox.addItem("31", 0);
  checkbox.addItem("32", 0);

  checkbox.deactivateAll();


  controlP5.addButton("Up", 0, 120, 120, 35, 20);
  controlP5.addButton("Down", 0, 120, 160, 35, 20);
  
  controlP5.addButton("Forward", 0, 180, 120, 45, 20);
  controlP5.addButton("Backward", 0, 180, 160, 45, 20);  
  
  controlP5.addButton("TurnLeft", 0, 60, 120, 40, 20);
  controlP5.addButton("TurnRight", 0, 60, 160, 40, 20);  
  

  port = new Serial(this, Serial.list()[0], 9600);

  for (int i=0;i<32;i++) 
  {
    flagsToSend[i] = 0;
    previousFlags[i] = 0;
  }

  addMouseWheelListener(new java.awt.event.MouseWheelListener() { 
    public void mouseWheelMoved(java.awt.event.MouseWheelEvent evt) { 
      mouseWheel(evt.getWheelRotation());
    }
  }
  ); 

  startSetUp();
}




//Incremental like bits
//0000, 0001, 0010, 0011, 0100, etc
void Up()
{
  String currentSpeed = binary(helicopterUpSpeed, 7);

  if(helicopterUpSpeed <= 125)
    helicopterUpSpeed += 1;

  String newSpeed = binary(helicopterUpSpeed, 7);

  setNewSpeed(currentSpeed, newSpeed);
}

void Down()
{
  String currentSpeed = binary(helicopterUpSpeed, 7);
  if (helicopterUpSpeed > 0)
    helicopterUpSpeed -= 1;
  String newSpeed = binary(helicopterUpSpeed, 7);

  setNewSpeed(currentSpeed, newSpeed);
} 


void Backward()
{
  String currentSpeed = binary(helicopterPitch, 7);

  helicopterPitch += 1;

  String newSpeed = binary(helicopterPitch, 7);

   setNewPitch(currentSpeed, newSpeed);
}

void Forward()
{
  String currentSpeed = binary(helicopterPitch, 7);

  helicopterPitch -= 1;

  String newSpeed = binary(helicopterPitch, 7);

   setNewPitch(currentSpeed, newSpeed);
}

void TurnLeft()
{
  String currentSpeed = binary(helicopterYaw, 7);

  helicopterYaw -= 1;

  String newSpeed = binary(helicopterYaw, 7);

  setNewYaw(currentSpeed, newSpeed);
}

void TurnRight()
{
  String currentSpeed = binary(helicopterYaw, 7);

  helicopterYaw += 1;

  String newSpeed = binary(helicopterYaw, 7);

  setNewYaw(currentSpeed, newSpeed);
}


void setNewSpeed(String currentSpeed, String newSpeed)
{
  
  //Compare each bit and see if it needs changing.
  if  (newSpeed.charAt(6) != currentSpeed.charAt(6) )
    checkbox.toggle(23);

  if  (newSpeed.charAt(5) != currentSpeed.charAt(5) )
    checkbox.toggle(22);

  if  (newSpeed.charAt(4) != currentSpeed.charAt(4) )
    checkbox.toggle(21);  

  if  (newSpeed.charAt(3) != currentSpeed.charAt(3) )
    checkbox.toggle(20);    

  if  (newSpeed.charAt(2) != currentSpeed.charAt(2) )
    checkbox.toggle(19);    

  if  (newSpeed.charAt(1) != currentSpeed.charAt(1) )
    checkbox.toggle(18);    

  if  (newSpeed.charAt(0) != currentSpeed.charAt(0) )
    checkbox.toggle(17);
}

void setNewPitch(String currentSpeed, String newSpeed)
{
  if  (newSpeed.charAt(6) != currentSpeed.charAt(6) )
    checkbox.toggle(15);

  if  (newSpeed.charAt(5) != currentSpeed.charAt(5) )
    checkbox.toggle(14);

  if  (newSpeed.charAt(4) != currentSpeed.charAt(4) )
    checkbox.toggle(13);    

  if  (newSpeed.charAt(3) != currentSpeed.charAt(3) )
    checkbox.toggle(12);    

  if  (newSpeed.charAt(2) != currentSpeed.charAt(2) )
    checkbox.toggle(11);    

  if  (newSpeed.charAt(1) != currentSpeed.charAt(1) )
    checkbox.toggle(10);    

  if  (newSpeed.charAt(0) != currentSpeed.charAt(0) )
    checkbox.toggle(9);
}

void setNewYaw(String currentSpeed, String newSpeed)
{
  if  (newSpeed.charAt(6) != currentSpeed.charAt(6) )
    checkbox.toggle(7);

  if  (newSpeed.charAt(5) != currentSpeed.charAt(5) )
    checkbox.toggle(6);

  if  (newSpeed.charAt(4) != currentSpeed.charAt(4) )
    checkbox.toggle(5);    

  if  (newSpeed.charAt(3) != currentSpeed.charAt(3) )
    checkbox.toggle(4);    

  if  (newSpeed.charAt(2) != currentSpeed.charAt(2) )
    checkbox.toggle(3);    

  if  (newSpeed.charAt(1) != currentSpeed.charAt(1) )
    checkbox.toggle(2);    

  if  (newSpeed.charAt(0) != currentSpeed.charAt(0) )
    checkbox.toggle(1);
}

void startSetUp()
{
  //First clear the arduino.
  port.write('a'); 
  port.write('b'); 
  port.write('c'); 
  port.write('d'); 
  port.write('e'); 
  port.write('f'); 
  port.write('g'); 
  port.write('h'); 
  port.write('i'); 
  port.write('j'); 
  port.write('k'); 
  port.write('l');
  port.write('m'); 
  port.write('o'); 
  port.write('p'); 
  port.write('q');
  port.write('r'); 
  port.write('s'); 
  port.write('t'); 
  port.write('u');
  port.write('v'); 
  port.write('w'); 
  port.write('x'); 
  port.write('y'); 
  port.write('z'); 
  port.write('1'); 
  port.write('3'); 
  port.write('5');
  port.write('7'); 
  port.write('9'); 
  port.write('@'); 
  port.write('$'); 
  port.write('^');


  //Set the pulse to the basic configuration.
  checkbox.toggle(1);
  checkbox.toggle(6);


  checkbox.toggle(10);
  checkbox.toggle(11);

  checkbox.toggle(12);
  checkbox.toggle(13);
  checkbox.toggle(14);
  checkbox.toggle(15);
  checkbox.toggle(16);

  checkbox.toggle(25);

  checkbox.toggle(28);
  checkbox.toggle(29);
  checkbox.toggle(30);
}


void draw() 
{ 
  background(200);
   
  text(" Current Speed: " + helicopterUpSpeed, 230, 135);
  text(" Pitch: " + helicopterPitch, 230, 165);
  text(" Yaw: " + helicopterYaw, 230, 195);  
}


  
  
  
void controlEvent(ControlEvent theEvent) {
 
  if (theEvent.isGroup()) {

    for (int i=0;i<theEvent.group().arrayValue().length;i++) 
    {
      byte n = (byte)theEvent.group().arrayValue()[i];
      flagsToSend[i] = n;
      //there was a change in the flags, send the update.
      if (previousFlags[i] != flagsToSend[i])
      {
        println(i+":"+n);
        if (i==0) {   
          if (n == 0) { 
            port.write('a');
          } 
          else { 
            port.write('A');
          }
        }
        if (i==1) {   
          if (n == 0) { 
            port.write('b');
          } 
          else { 
            port.write('B');
          }
        } 
        if (i==2) {   
          if (n == 0) { 
            port.write('c');
          } 
          else { 
            port.write('C');
          }
        }
        if (i==3) {   
          if (n == 0) { 
            port.write('d');
          } 
          else { 
            port.write('D');
          }
        }                 
        if (i==4) {   
          if (n == 0) { 
            port.write('e');
          } 
          else { 
            port.write('E');
          }
        }    
        if (i==5) {   
          if (n == 0) { 
            port.write('f');
          } 
          else { 
            port.write('F');
          }
        }  
        if (i==6) {   
          if (n == 0) { 
            port.write('g');
          } 
          else { 
            port.write('G');
          }
        }
        if (i==7) {   
          if (n == 0) { 
            port.write('h');
          } 
          else { 
            port.write('H');
          }
        }
        if (i==8) {   
          if (n == 0) { 
            port.write('i');
          } 
          else { 
            port.write('I');
          }
        }
        if (i==9) {   
          if (n == 0) { 
            port.write('j');
          } 
          else { 
            port.write('J');
          }
        }
        if (i==10) {   
          if (n == 0) { 
            port.write('k');
          } 
          else { 
            port.write('K');
          }
        }
        if (i==11) {   
          if (n == 0) { 
            port.write('l');
          } 
          else { 
            port.write('L');
          }
        }
        if (i==12) {   
          if (n == 0) { 
            port.write('m');
          } 
          else { 
            port.write('M');
          }
        }
        if (i==13) {   
          if (n == 0) { 
            port.write('o');
          } 
          else { 
            port.write('O');
          }
        }  
        if (i==14) {   
          if (n == 0) { 
            port.write('p');
          } 
          else { 
            port.write('P');
          }
        }
        if (i==15) {   
          if (n == 0) { 
            port.write('q');
          } 
          else { 
            port.write('Q');
          }
        }
        if (i==16) {   
          if (n == 0) { 
            port.write('r');
          } 
          else { 
            port.write('R');
          }
        }
        if (i==17) {   
          if (n == 0) { 
            port.write('s');
          } 
          else { 
            port.write('S');
          }
        }
        if (i==18) {   
          if (n == 0) { 
            port.write('t');
          } 
          else { 
            port.write('T');
          }
        }
        if (i==19) {   
          if (n == 0) { 
            port.write('u');
          } 
          else { 
            port.write('U');
          }
        }
        if (i==20) {   
          if (n == 0) { 
            port.write('v');
          } 
          else { 
            port.write('V');
          }
        }
        if (i==21) {   
          if (n == 0) { 
            port.write('w');
          } 
          else { 
            port.write('W');
          }
        }
        if (i==22) {   
          if (n == 0) { 
            port.write('x');
          } 
          else { 
            port.write('X');
          }
        }
        if (i==23) {   
          if (n == 0) { 
            port.write('y');
          } 
          else { 
            port.write('Y');
          }
        }
        if (i==24) {   
          if (n == 0) { 
            port.write('z');
          } 
          else { 
            port.write('Z');
          }
        }
        if (i==25) {   
          if (n == 0) { 
            port.write('1');
          } 
          else { 
            port.write('2');
          }
        }
        if (i==26) {   
          if (n == 0) { 
            port.write('3');
          } 
          else { 
            port.write('4');
          }
        }
        if (i==27) {   
          if (n == 0) { 
            port.write('5');
          } 
          else { 
            port.write('6');
          }
        }
        if (i==28) {   
          if (n == 0) { 
            port.write('7');
          } 
          else { 
            port.write('8');
          }
        }
        if (i==29) {   
          if (n == 0) { 
            port.write('9');
          } 
          else { 
            port.write('!');
          }
        }
        if (i==30) {   
          if (n == 0) { 
            port.write('@');
          } 
          else { 
            port.write('#');
          }
        }
        if (i==31) {   
          if (n == 0) { 
            port.write('$');
          } 
          else { 
            port.write('%');
          }
        }
        if (i==32) {   
          if (n == 0) { 
            port.write('^');
          } 
          else { 
            port.write('&');
          }
        }
      }

      previousFlags[i]=n;
    }
  }
}


void mouseWheel(int delta) {
  if (delta == 1)
    Down();
  else
    Up();
}