// 2.2 
int ledPin = D3;

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

   digitalWrite(ledPin, LOW);
   
   Particle.function("led", ledControl);
}

void loop() {

}

int ledControl(String command)
{
    int times = command.toInt();
   for (int i=1; i<=times; i++) {
        digitalWrite(ledPin, HIGH);   
        delay(500);               

        digitalWrite(ledPin, LOW);   
        delay(500);  
   }

   return 1;
}