Create test_on_off.ino

test_on_off.ino

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+char Incoming_value = 0;                //Variable for storing Incoming_value
+void setup() 
+{
+  Serial.begin(9600);         //Sets the data rate in bits per second (baud) for serial data transmission
+  pinMode(13, OUTPUT);        //Sets digital pin 13 as output pin
+}
+void loop()
+{
+  if(Serial.available() > 0)  
+  {
+    Incoming_value = Serial.read();      //Read the incoming data and store it into variable Incoming_value
+    Serial.print(Incoming_value);        //Print Value of Incoming_value in Serial monitor
+    Serial.print("\n");        //New line 
+    if(Incoming_value == '1')            //Checks whether value of Incoming_value is equal to 1 
+      digitalWrite(13, HIGH);  //If value is 1 then LED turns ON
+    else if(Incoming_value == '0')       //Checks whether value of Incoming_value is equal to 0
+      digitalWrite(13, LOW);   //If value is 0 then LED turns OFF
+  }                            
+ 
+}