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

#define DHT_PIN 2 // Pin data DHT22 (atau DHT11) terhubung ke pin 2
#define DHT_TYPE 22 // Ganti dengan DHT11 jika menggunakan sensor DHT11

#define RED_LED_PIN 8 // Pin LED merah
#define YELLOW_LED_PIN 9 // Pin LED kuning
#define GREEN_LED_PIN 10 // Pin LED hijau

DHT dht(2, 22);

LiquidCrystal_I2C lcd(0x27, 16, 2);
void setup() {
  Serial.begin(9600);
  dht.begin();
  lcd.init(); // Inisialisasi LCD
  lcd.backlight(); // Hidupkan backlight LCD

  pinMode(RED_LED_PIN, OUTPUT);
  pinMode(YELLOW_LED_PIN, OUTPUT);
  pinMode(GREEN_LED_PIN, OUTPUT);

  digitalWrite(RED_LED_PIN, LOW);
  digitalWrite(YELLOW_LED_PIN, LOW);
  digitalWrite(GREEN_LED_PIN, LOW);
}

void loop() {
delay(2000);
  float temperature = dht.readTemperature(); // Membaca suhu dari sensor DHT22
 float lembab = dht.readHumidity();

 lcd.clear(); // Membersihkan tampilan LCD
  lcd.setCursor(0, 0); // Mengatur posisi kursor ke baris pertama
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print(" C");
  
  lcd.setCursor(0, 1); // Mengatur posisi kursor ke baris kedua
  lcd.print("Lembab: ");
  lcd.print(lembab);
  lcd.print(" %");

  if (isnan(temperature) && (lembab)) {
    Serial.println("Gagal membaca suhu dari sensor DHT22!");
    return;
  }

  Serial.print("Suhu: ");
  Serial.println(temperature);
  Serial.print("Lembab: ");
  Serial.println(lembab);

  if (temperature > 35) {
    digitalWrite(RED_LED_PIN, HIGH);
    digitalWrite(YELLOW_LED_PIN, LOW);
    digitalWrite(GREEN_LED_PIN, LOW);
  } else if (temperature >= 30 && temperature <= 35) {
    digitalWrite(RED_LED_PIN, LOW);
    digitalWrite(YELLOW_LED_PIN, HIGH);
    digitalWrite(GREEN_LED_PIN, LOW);
  } else {
    digitalWrite(RED_LED_PIN, LOW);
    digitalWrite(YELLOW_LED_PIN, LOW);
    digitalWrite(GREEN_LED_PIN, HIGH);
  }
  delay(2000); // Mengukur suhu setiap 2 detik
}