#define BUTTON_PIN 25
#define LED_PIN 4

bool lastState = LOW;
bool currentState = LOW;

void setup() {
  Serial.begin(115200);

  pinMode(BUTTON_PIN, INPUT_PULLDOWN);
  pinMode(LED_PIN, OUTPUT);
}

void loop() {
  currentState = digitalRead(BUTTON_PIN);

  // deteksi tombol ditekan (LOW -> HIGH)
  if (currentState == HIGH && lastState == LOW) {
    Serial.println("Button pressed!");
    digitalWrite(LED_PIN, HIGH);
  }

  // deteksi tombol dilepas (HIGH -> LOW)
  if (currentState == LOW && lastState == HIGH) {
    Serial.println("Button released!");
    digitalWrite(LED_PIN, LOW);
  }

  lastState = currentState;
}