#define BUTTON_PIN 28  // GPIO pin where the button is connected

void setup() {
  // Start Serial communication at 9600 baud rate
  Serial.begin(9600);

  // Set the button pin as input with internal pull-up resistor
  pinMode(BUTTON_PIN, INPUT_PULLUP);
}

void loop() {
  // Read the button state (LOW means pressed, HIGH means not pressed)
  if (digitalRead(BUTTON_PIN) == LOW) {
    // Send 'OFF' signal to Arduino to turn off the onboard LED
    Serial.println("OFF");
    delay(500);  // Debounce delay to avoid multiple triggers
  }
}