LED CONTROL

 #define LED 2

void setup() {

  pinMode(LED, OUTPUT);

  Serial.begin(115200);

  Serial.println("=== Hello ===");

  Serial.println("=== ESP32 LED CONTROL ===");

  Serial.println("Type ON to turn the LED ON");

  Serial.println("Type OFF to turn the LED OFF");

}

void loop() {

  if (Serial.available() > 0) {

    String command = Serial.readStringUntil('\n');

    command.trim();

    command.toUpperCase();

    if (command == "ON") {

      digitalWrite(LED, HIGH);

      Serial.println("LED ON");

    }

    else if (command == "OFF") {

      digitalWrite(LED, LOW);

      Serial.println("LED OFF");

    }

    else {

      Serial.println("Invalid command. Use ON or OFF.");

    }

  }

}