Controlling the D7+RGB leds on the Spark Core over HTTP

api-blink.ino

// Define the pins we're going to call pinMode on
int led = D7; // This one is the built-in tiny one to the right of the USB jack

int r = 0;
int g = 0;
int b = 0;

// This routine runs only once upon reset
void setup() {
  pinMode(led, OUTPUT);

  Spark.function("on", on);
  Spark.function("off", off);
  Spark.function("rgb", rgb);
}

void loop() {
    // Do nothing
}

int on(String args) {
    digitalWrite(led, HIGH); // Turn ON the LED pin
}

int off(String args) {
    digitalWrite(led, LOW);  // Turn OFF the LED pin
}

int rgb(String args) {
    int c1 = args.indexOf(",");
    
    if(c1>-1){
        RGB.control(true);
        
        int c2 = args.indexOf(",", c1+1);
        int nr = args.substring(0, c1).toInt();
        int ng = args.substring(c1+1, c2).toInt();
        int nb = args.substring(c2+1).toInt();
    
        if(nr >= 0 && nr < 256) { r = nr; }
        if(ng >= 0 && ng < 256) { g = ng; }
        if(nb >= 0 && nb < 256) { b = nb; }    
    }
    
    // red, green, blue, 0-255
    RGB.color(r,g,b);
}