#include <DHT.h>

#define LDR_PIN A0
#define MQ2_PIN A1
#define DHT_PIN 2
#define LED_PIN 9
#define BUZZER_PIN 10

#define DHT_TYPE DHT11 // Bisa diganti DHT22 jika pakai tipe lain

DHT dht(DHT_PIN, DHT_TYPE);

void setup() {
  Serial.begin(9600);
  dht.begin();
  
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);
}

void loop() {
  // Baca sensor
  int ldrValue = analogRead(LDR_PIN);
  int mq2Value = analogRead(MQ2_PIN);
  float temp = dht.readTemperature();
  float hum = dht.readHumidity();
  
  // Print data ke Serial Monitor
  Serial.print("LDR: ");
  Serial.print(ldrValue);
  Serial.print(" | MQ2: ");
  Serial.print(mq2Value);
  Serial.print(" | Temp: ");
  Serial.print(temp);
  Serial.print(" *C");
  Serial.print(" | Humidity: ");
  Serial.print(hum);
  Serial.println(" %");

  // Logika LED dan buzzer:
  // LED menyala kalau gelap (LDR value kecil)
  // Buzzer bunyi kalau gas terdeteksi (MQ2 value tinggi)
  // Buzzer juga bunyi kalau suhu di atas 30 derajat

  bool isDark = (ldrValue < 300);       // Threshold untuk gelap, bisa disesuaikan
  bool gasDetected = (mq2Value > 400);  // Threshold MQ2, sesuaikan juga
  bool tempHigh = (temp > 30);

  if (isDark) {
    digitalWrite(LED_PIN, HIGH);
  } else {
    digitalWrite(LED_PIN, LOW);
  }

  if (gasDetected || tempHigh) {
    digitalWrite(BUZZER_PIN, HIGH);
  } else {
    digitalWrite(BUZZER_PIN, LOW);
  }

  delay(1000); // Delay 1 detik
}