// by N M D Weerasinghe SLCOTM
String msg = "";



void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
Serial.println();

}

void loop() {
  // put your main code here, to run repeatedly:
    if(Serial.available()>0)
    {
      msg = Serial.readString();

      Serial.println("LED1 ON : ");
      Serial.println(msg.indexOf("LED1 ON"));
      Serial.println("LED1 OFF : ");
      Serial.println(msg.indexOf("LED1 OFF"));


}


}