int ledPin = 25;
String status;

void setup() {
  pinMode(ledPin, OUTPUT);
  Serial.begin(115200);
  Serial.println("Start");
}

void loop() {
  
while(Serial.available() == 0){
  
}


status = Serial.readString();


 if(status == "on"){

  digitalWrite(ledPin, HIGH);
}

if(status == "off"){

  digitalWrite(ledPin, LOW);
}


  delay(100); 
}