// RGB LED

int redPin = D2;
int greenPin = D3;
int bluePin = D4;
int redValue = 255;
int greenValue = 255;
int blueValue = 255;

void setup()
{
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);

  Particle.function("led", ledControl);

  analogWrite(redPin, redValue);
  analogWrite(greenPin, greenValue);
  analogWrite(bluePin, blueValue);
}

void loop()
{
}

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++;
      }
    }

    redValue = colors[0].toInt();
    greenValue = colors[1].toInt();
    blueValue = colors[2].toInt();

   analogWrite(redPin, redValue);
   analogWrite(greenPin, greenValue);
   analogWrite(bluePin, blueValue);

   return 1;
}
```