// name the pins
int ledPin = D2;

void setup()
{
    // Configure the pins to be outputs
    pinMode(ledPin, OUTPUT);
    // Initialize both the LEDs to be OFF
    digitalWrite(ledPin, LOW);
    Particle.function("led", ledControl);
    
}

void loop()
{
   // Nothing to do here    
}

int ledControl(String command)
{
   int state = LOW;

   // find out the state of the led
   if(command == "HIGH")
   {
	   state = HIGH;
   }
  
   else if(command == "LOW")
   { 
	   state = LOW;
   }
   
   else
   {
	   return -1;
   }
   
   // write to the appropriate pin
   digitalWrite(ledPin, state);
   return 1;
}