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

// Pin untuk DHT22
#define DHTPIN 2
#define DHTTYPE DHT22

// Pin untuk LED
#define LED_MERAH 8
#define LED_HIJAU 7

// Inisialisasi DHT22
DHT dht(DHTPIN, DHTTYPE);

// Inisialisasi LCD
LiquidCrystal_I2C lcd(0x27, 16, 2);  // bisa 0x27 atau 0x3F

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

  pinMode(LED_MERAH, OUTPUT);
  pinMode(LED_HIJAU, OUTPUT);

  lcd.setCursor(0, 0);
  lcd.print("Weather Monitor");
  delay(2000);
  lcd.clear();
}

void loop() {
  // Baca sensor DHT22
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Jika gagal baca sensor
  if (isnan(temperature) || isnan(humidity)) {
    lcd.setCursor(0, 0);
    lcd.print("Sensor Error!");
    return;
  }

  // Tampilkan suhu & kelembaban di LCD
  lcd.setCursor(0, 0);
  lcd.print("T:");
  lcd.print(temperature, 1);
  lcd.print("C ");

  lcd.setCursor(8, 0);
  lcd.print("H:");
  lcd.print(humidity, 0);
  lcd.print("% ");

  // Logika hujan / tidak hujan berdasarkan suhu
  lcd.setCursor(0, 1);
  if (temperature < 20) {
    lcd.print("Sprinkle: YES ");
    digitalWrite(LED_MERAH, HIGH);
    digitalWrite(LED_HIJAU, LOW);
    Serial.println("Hujan (Temp < 20C)");
  } else if (temperature > 30) {
    lcd.print("Sprinkle: NO  ");
    digitalWrite(LED_MERAH, LOW);
    digitalWrite(LED_HIJAU, HIGH);
    Serial.println("Tidak hujan (Temp > 30C)");
  } else {
    lcd.print("Status: UNCERT ");
    digitalWrite(LED_MERAH, LOW);
    digitalWrite(LED_HIJAU, LOW);
    Serial.println("Tidak pasti (20C-30C)");
  }

  delay(2000);
}