#include "DHTesp.h"
#include <LiquidCrystal_I2C.h>

const int DHT_PIN = 15;          // Pin DHT22
const int BUZZER = 18;           // Pin buzzer
const int GAS_SENSOR_PIN = A0;   // Pin sensor gas MQ-2 (analog)

DHTesp dhtSensor;
LiquidCrystal_I2C lcd(0x27, 20, 4);  // LCD 20x4

// Threshold gas untuk mendeteksi gas berbahaya (nilai dapat disesuaikan)
int gasThreshold = 400; // Ambang batas deteksi gas

void setup() {
  Serial.begin(115200);
  pinMode(BUZZER, OUTPUT);      // Set buzzer as output
  pinMode(2, OUTPUT);           // LED merah
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);  // Setup DHT22
  lcd.init();
  lcd.backlight();

  lcd.setCursor(8, 0);
  lcd.print("Projek");
  lcd.setCursor(3, 1);
  lcd.print("Alarm Kebakaran");
  lcd.setCursor(8, 2);
  lcd.print("oleh");
  lcd.setCursor(0, 3);
  lcd.print("Dimas Edwin Saputra");
  delay(3000);
  lcd.clear();
}

void loop() {
  // Membaca data suhu dan kelembaban dari DHT22
  TempAndHumidity data = dhtSensor.getTempAndHumidity();
  Serial.println("Temp: " + String(data.temperature, 2) + "C");
  Serial.println("Humidity: " + String(data.humidity, 2) + "%");
  Serial.println("---");

  // Membaca nilai dari sensor gas MQ-2 (analog)
  int gasValue = analogRead(GAS_SENSOR_PIN); // Membaca nilai gas dari pin analog
  Serial.println("Gas Sensor Value: " + String(gasValue));

  // Tampilan di LCD
  lcd.setCursor(3, 0);
  lcd.print("Informasi Suhu");
  lcd.setCursor(0, 1);
  lcd.print("Suhu       : " + String(data.temperature, 2) + " C");
  lcd.setCursor(0, 2);
  lcd.print("Kelembaban : " + String(data.humidity, 2) + " %");
  delay(3000);
  lcd.clear();

  // Menilai status suhu dan memberikan peringatan
  if (data.temperature < 25) {
    lcd.setCursor(8, 1);
    lcd.print("AMAN");
    lcd.setCursor(1, 2);
    lcd.print("SELAMAT BERAKTIFITAS");
    digitalWrite(2, LOW);        // LED mati
    noTone(BUZZER);              // Buzzer mati
  }
  else if (data.temperature > 32) {
    lcd.setCursor(3, 1);
    lcd.print("BAHAYA API!!!");
    lcd.setCursor(3, 2);
    lcd.print("LARI LARI LARI");
    digitalWrite(2, HIGH);       // LED menyala
    tone(BUZZER, 1000);          // Buzzer berbunyi
  }
  else if (data.temperature >= 25 && data.temperature <= 32) {
    lcd.setCursor(3, 1);
    lcd.print("PERINGATAN API!!!");
    digitalWrite(2, LOW);        // LED mati
    noTone(BUZZER);              // Buzzer mati
  }

  // Cek kondisi gas dari sensor MQ-2
  if (gasValue > gasThreshold) {  // Jika nilai gas melebihi threshold, gas dianggap berbahaya
    lcd.setCursor(3, 1);
    lcd.print("BAHAYA GAS!!!");
    lcd.setCursor(3, 2);
    lcd.print("EVAKUASI SEKARANG");
    digitalWrite(2, HIGH);    // LED merah menyala
    tone(BUZZER, 1000);       // Buzzer berbunyi
  } else {
    // Kondisi aman untuk gas
    digitalWrite(2, LOW);     // LED mati
    noTone(BUZZER);           // Buzzer mati
  }

  delay(2000);  // Tunggu sebelum pembaruan selanjutnya
  lcd.clear();
}