#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>

// Setup LCD I2C 16x2, alamat default 0x27
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Definisi pin sensor dan LED
#define DHTPIN 4        // Pin data sensor DHT22
#define DHTTYPE DHT22   // Tipe sensor DHT

#define SENSOR_PIN 2    // Pin input sensor digital
#define LED_PIN 3       // Pin output LED

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  lcd.init();
  lcd.backlight();
  Serial.begin(9600);

  dht.begin();

  pinMode(SENSOR_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT);

  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Inisialisasi...");
  delay(1000);
}

void loop() {
  // Membaca suhu dan kelembapan
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  // Membaca status sensor digital
  int sensorState = digitalRead(SENSOR_PIN);

  // Menyalakan LED jika sensor HIGH, matikan jika LOW
  digitalWrite(LED_PIN, sensorState);

  // Menampilkan ke LCD
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Suhu:");
  if (isnan(temperature)) {
    lcd.print("Err");
  } else {
    lcd.print(temperature);
    lcd.print("C");
  }

  lcd.setCursor(0,1);
  lcd.print("Hum:");
  if (isnan(humidity)) {
    lcd.print("Err");
  } else {
    lcd.print(humidity);
    lcd.print("% ");
  }

  lcd.print(sensorState == HIGH ? "LED ON" : "LED OFF");

  // Tampilkan juga di serial monitor
  Serial.print("Suhu: ");
  Serial.print(temperature);
  Serial.print(" C, Hum: ");
  Serial.print(humidity);
  Serial.print("%, Sensor: ");
  Serial.println(sensorState == HIGH ? "ON" : "OFF");

  delay(2000); // Delay 2 detik sebelum pembacaan berikutnya
}