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

#define DHTPIN 2      // Pin data DHT terhubung ke pin 2
#define DHTTYPE DHT11 // Pilih tipe DHT11 atau DHT22
#define LEDPIN 7      // Pin LED terhubung ke pin 7
#define BUZZERPIN 8   // Pin Buzzer terhubung ke pin 8

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2); // Alamat I2C LCD 0x27

void setup() {
  pinMode(LEDPIN, OUTPUT);
  pinMode(BUZZERPIN, OUTPUT);
  lcd.begin();              // Memulai LCD
  lcd.backlight();          // Mengaktifkan backlight LCD
  dht.begin();              // Memulai sensor DHT
  lcd.setCursor(0, 0);
  lcd.print("Suhu & Kelembapan");
}

void loop() {
  delay(2000);  // Tunggu 2 detik antar pembacaan sensor

  float suhu = dht.readTemperature();    // Membaca suhu dalam Celsius
  float kelembapan = dht.readHumidity(); // Membaca kelembapan

  if (isnan(suhu) || isnan(kelembapan)) {
    lcd.setCursor(0, 1);
    lcd.print("Error membaca data");
    return;
  }

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Suhu: ");
  lcd.print(suhu);
  lcd.print(" C");

  lcd.setCursor(0, 1);
  lcd.print("Kelembapan: ");
  lcd.print(kelembapan);
  lcd.print(" %");

  if (suhu >= 25) {
    digitalWrite(LEDPIN, HIGH);    // Nyalakan LED
    digitalWrite(BUZZERPIN, HIGH); // Nyalakan Buzzer
  } else {
    digitalWrite(LEDPIN, LOW);     // Matikan LED
    digitalWrite(BUZZERPIN, LOW);  // Matikan Buzzer
  }
}