holidayLights.ino

/*  
  This sketch controls a string of holiday lights using
  the LigthBlue Bean and the iOS app LightBlue.

  This code is in the public domain.
 */

// The control inputs we will use from LightBlue
#define button1  13
#define button2  14
#define button3  15

void setup() 
{
  Serial.begin();
  Serial.setTimeout(5);
  
  // Set the pins connected to the holiday lights to OUTPUT
  pinMode(0, OUTPUT);
  pinMode(1, OUTPUT);
  pinMode(2, OUTPUT);
 }

void loop() {
  // Check for serial messages from LightBlue
  char buffer[64];
  size_t length = 64; 
      
  length = Serial.readBytes(buffer, length);    
  
  if ( length > 0 )
  {
    for (int i = 0; i < length - 1; i += 2 )
    {
      // Check if button1 has been pressed or released...
      if ( buffer[i] == button1 )
      {
        // If the button is held down, buffer[i+1] will be 0
        // If it's released, buffer[i+1] is 1
        // Set pin 0 to 1 when the button is held down
        // and to 0 when released
        digitalWrite(0,1-buffer[i+1]);
      }
      else if ( buffer[i] == button2 )
      {
        digitalWrite(1,1-buffer[i+1]);
      }
      else if ( buffer[i] == button3 )
      {
        digitalWrite(2,1-buffer[i+1]);
      }
    }
  }
}