int led1 = D2;

void setup() {
    
pinMode( led1, OUTPUT);

digitalWrite(led1, LOW);

Particle.function("led", ledControl);

}

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(led1, state);
   return 1;
}

void loop() {