#define GAS_SENSOR_PIN 34     // Pin analog ESP32
#define LED_PIN 2             // LED built-in (sebagai indikator)
#define BUZZER_PIN 15         // Buzzer (opsional)

int gasThreshold = 400;       // Nilai ambang batas bahaya gas

void setup() {
  Serial.begin(115200);
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);
}

void loop() {
  int gasValue = analogRead(GAS_SENSOR_PIN);
  Serial.print("Nilai Gas: ");
  Serial.println(gasValue);

  if (gasValue > gasThreshold) {
    digitalWrite(LED_PIN, HIGH);      // Aktifkan LED
    digitalWrite(BUZZER_PIN, HIGH);   // Aktifkan Buzzer
    Serial.println("🚨 BAHAYA! Gas terdeteksi dalam jumlah tinggi!");
  } else {
    digitalWrite(LED_PIN, LOW);
    digitalWrite(BUZZER_PIN, LOW);
  }

  delay(1000);
}