// Define variables 
int dataIn=0;  
const int nodeID=1; 
const int ledPin = 2; 
 
void setup() { 
  // Set up serial and LED pin 
  Serial.begin(9600);  
  pinMode(ledPin, OUTPUT); 
} 
 
void loop() { 
  // While the serial is connected 
  if (Serial.available () > 0) { 
    dataIn = Serial.parseInt(); // Read incoming signal 
         
    if(dataIn == nodeID){ // If it's the board's ID, blink twice. 
      digitalWrite(ledPin, HIGH); 
      delay(500); 
      digitalWrite(ledPin, LOW); 
      delay(500); 
      digitalWrite(ledPin, HIGH); 
      delay(500); 
      digitalWrite(ledPin, LOW); 
      delay(500); 
    } 
  } 
}