#define LED_PIN 10  // Change this to your connected LED pin

void setup() {
  Serial.begin(115200);    // Start serial communication
  pinMode(LED_PIN, OUTPUT);
  digitalWrite(LED_PIN, LOW);  // Ensure LED is off initially
}

void loop() {
  if (Serial.available()) {
    String command = Serial.readStringUntil('\n');  // Read until newline
    command.trim();  // Remove any trailing whitespace

    if (command == "ON") {
      digitalWrite(LED_PIN, HIGH);
    } else if (command == "OFF") {
      digitalWrite(LED_PIN, LOW);
    }
  }
}