const int led_pin = 32;

void setup() {
  pinMode(led_pin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  if (Serial.available() > 0) {
    String input = Serial.readStringUntil('\n');
    if (input.equals("start")) {
      digitalWrite(led_pin, HIGH);
    }
     else if (input.equals("stop")) {
      digitalWrite(led_pin, LOW);
    }
  }
  
  // Adding a delay to prevent continuous looping
  delay(100);
}