#define LED_PIN  2       // GPIO connected to LED
#define BUTTON_PIN  4    // GPIO connected to button

void setup() {
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT_PULLUP); // use internal pull-up resistor
  Serial.begin(115200);
  Serial.println("ESP32 LED Button Test");
}

void loop() {
  int buttonState = digitalRead(BUTTON_PIN);

  if (buttonState == LOW) { // button pressed
    digitalWrite(LED_PIN, HIGH);
    Serial.println("Button pressed - LED ON");
  } else { // button not pressed
    digitalWrite(LED_PIN, LOW);
    Serial.println("Button released - LED OFF");
  }

  delay(100);
}