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

#define DHTPIN 15     // Pin yang terhubung dengan DHT22
#define DHTTYPE DHT22 // DHT 22 (AM2302)

const int SOLENOID_PIN = 5; // Pin untuk mengontrol solenoid (LED)
const int LCD_COLUMNS = 16;
const int LCD_ROWS = 2;
LiquidCrystal_I2C lcd(0x27, LCD_COLUMNS, LCD_ROWS); // Ganti alamat I2C jika berbeda

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  pinMode(SOLENOID_PIN, OUTPUT); // Mengatur GPIO 5 sebagai output
  Serial.begin(115200); // Memulai komunikasi serial
  dht.begin(); // Menginisialisasi DHT22

  lcd.init(); // Menginisialisasi LCD
  lcd.backlight(); // Mengaktifkan backlight LCD

  // Menampilkan pesan awal di LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("DHT22 & Solenoid");
  lcd.setCursor(0, 1);
  lcd.print("Initializing...");
  delay(2000); // Menunggu selama 2 detik
}

void loop() {
  float temperature = dht.readTemperature(); // Membaca suhu

  if (isnan(temperature)) {
    Serial.println("Failed to read from DHT sensor!");
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Failed to read");
    lcd.setCursor(0, 1);
    lcd.print("from DHT sensor");
    delay(2000);
    return;
  }

  Serial.println("Temp: " + String(temperature, 2) + "°C");
  Serial.println("---");

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(temperature, 2);
  lcd.print(" C");

  if (temperature >= 25) {
    digitalWrite(SOLENOID_PIN, HIGH); // Menyalakan solenoid (LED)
    Serial.println("Solenoid ON");
    lcd.setCursor(0, 1);
    lcd.print("Solenoid: ON");
  } else if (temperature <= 20) {
    digitalWrite(SOLENOID_PIN, LOW); // Mematikan solenoid (LED)
    Serial.println("Solenoid OFF");
    lcd.setCursor(0, 1);
    lcd.print("Solenoid: OFF");
  }

  delay(2000); // Tunggu selama 2 detik sebelum membaca ulang
}