nt redPin = D2;    // RED pin of the LED to PWM pin **A4**
int greenPin = D3;  // GREEN pin of the LED to PWM pin **D0**
int bluePin = D4;   // BLUE pin of the LED to PWM pin **D1**
int redValue = 255; // Full brightness for an Cathode RGB LED is 0, and off 255
int greenValue = 255; // Full brightness for an Cathode RGB LED is 0, and off 255
int blueValue = 255; // Full brightness for an Cathode RGB LED is 0, and off 255


void setup() {
    
    // Set up our pins for output
  pinMode( redPin, OUTPUT);
  pinMode( greenPin, OUTPUT);
  pinMode( bluePin, OUTPUT);
  
  //Register our Particle function here
  Particle.function("led", ledControl);

  // turn them all off...
  analogWrite( redPin, redValue);
  analogWrite( greenPin, greenValue);
  analogWrite( bluePin, blueValue);

}

void loop() {
    
    // Nothing to do here

}

int ledControl( String command )

{
    String colors[3];
    colors[0]="";
    colors[1]="";
    colors[2]="";

    int index = 0;
    for( int i = 0; i < command.length(); i++ )
    {
      if( index < 3 ){
        char c = command.charAt(i);
        colors[index] += c;

        if( c == ',') index++;
      }
    }

    // get the red component...
    redValue = colors[0].toInt();
    // now green
    greenValue = colors[1].toInt();
    // now blue
    blueValue = colors[2].toInt();

   // write the mixed color
   analogWrite( redPin, redValue);
   analogWrite( greenPin, greenValue);
   analogWrite( bluePin, blueValue);

   return 1;
}