RGB LED Particle Photon Basic Firmware

rgb_led.particle.c

// From http://diotlabs.daraghbyrne.me/2-leds-continued/using-rgb-leds/

int redPin = D0;    // RED pin of the LED to PWM pin **A4**
int greenPin = D2;  // GREEN pin of the LED to PWM pin **D0**
int bluePin = D3;   // 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</td>

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;
    int strLength = command.length();
    for (int i = 0; i < strLength; 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;
}