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

#define DHTPIN 2
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

int lampu1 = 13;
int lampu2 = 7;
int lampu3 = 12;
const int buzzerA = 4;

LiquidCrystal_I2C lcd(0x27, 16, 2);  

void setup() {
  pinMode(lampu1, OUTPUT);
  pinMode(lampu2, OUTPUT);
  pinMode(lampu3, OUTPUT);
  pinMode(buzzerA, OUTPUT);

  Serial.begin(9600);
  dht.begin();

  lcd.init();
  lcd.backlight();
}

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

  if (isnan(suhu)) {
    Serial.println("Gagal membaca sensor DHT22!");
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Gagal membaca DHT");
    return;
  }

  Serial.print("Suhu: ");
  Serial.println(suhu);

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

  if (suhu > 45) {
    digitalWrite(lampu1, HIGH);
    digitalWrite(lampu2, LOW);
    digitalWrite(lampu3, LOW);
    tone(buzzerA, 1000); 
    delay(1000);

    digitalWrite(lampu1, LOW);
    digitalWrite(lampu2, HIGH);
    digitalWrite(lampu3, LOW);
    tone(buzzerA, 1000); 
    delay(1000);

    digitalWrite(lampu1, LOW);
    digitalWrite(lampu2, LOW);
    digitalWrite(lampu3, HIGH);
    tone(buzzerA, 1000); 
    delay(1000);

    noTone(buzzerA);
  } else {
  
    digitalWrite(lampu1, HIGH);
    digitalWrite(lampu2, LOW);
    digitalWrite(lampu3, LOW);
    delay(1000);

    digitalWrite(lampu1, LOW);
    digitalWrite(lampu2, HIGH);
    digitalWrite(lampu3, LOW);
    delay(1000);

    digitalWrite(lampu1, LOW);
    digitalWrite(lampu2, LOW);
    digitalWrite(lampu3, HIGH);
    delay(1000);
  }

  delay(2000); }