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

LiquidCrystal_I2C lcd(0x27, 16, 2);
const int DHT_PIN = 13;
const int MQ2_PIN = 34;

DHTesp dhtSensor;

void setup() {
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  lcd.init();
  lcd.backlight();

  lcd.setCursor(2,0);
  lcd.print("Hello Guys!");
  
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  pinMode(MQ2_PIN, INPUT);
}

void loop() {
   TempAndHumidity data = dhtSensor.getTempAndHumidity();
  
  int gasValue = analogRead(MQ2_PIN);
  String gasStatus = (gasValue > 2000) ? "GAS TINGGI!" : "Gas Aman";
  
  Serial.println("Suhu: " + String(data.temperature, 2) + "C");
  Serial.println("Humidity: " + String(data.humidity, 1) + "%");
  Serial.println("Level Gas: " + String(gasValue) + " - " + gasStatus);
  Serial.println("---");

  static unsigned long lastChange = 0;
  static bool showGas = false;
  
  if (millis() - lastChange > 2000) {
    showGas = !showGas;
    lastChange = millis();
    lcd.clear();
  }

  if (showGas) {
    lcd.setCursor(0,0);
    lcd.print("Level Gas:" + String(gasValue));
    lcd.setCursor(0,1);
    lcd.print(String(gasStatus));
  } else {
    lcd.setCursor(0,0);
    lcd.print("Suhu: " + String(data.temperature, 2) + " C");
    lcd.setCursor(0,1);
    lcd.print("Humidity: " + String(data.humidity, 1) + "%");
  }

  delay(500);
}