diff --git a/sensorNode/sensor.ino b/sensorNode/sensor.ino
index 2037efc..14185b8 100644
--- a/sensorNode/sensor.ino
+++ b/sensorNode/sensor.ino
@@ -10,6 +10,7 @@
 const int trigPin = 9;
 const int echoPin = 10;
 const int response = 6;
+const int id = 1;
 
 // defines variables
 long duration;
@@ -43,11 +44,11 @@ distance= duration*0.034/2;
 //Serial.println(distance);
 
 if (distance < 5){
-  Serial.println("0"); //parking isn't available.
+  Serial.println(id+"#0"); //parking isn't available.
   digitalWrite(response, LOW);
 }
 else{
-  Serial.println("1"); //parking is available.
+  Serial.println(id+"#1"); //parking is available.
   digitalWrite(response, HIGH);
 }