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

LiquidCrystal_I2C lcd(0x27, 16, 2);
DHT dht(2, DHT22);
const int led = 3;
const int buzzer = 4;

void setup() {
  lcd.init();
  lcd.backlight();
  pinMode(led, OUTPUT);
  pinMode(buzzer, OUTPUT);
  Serial.begin(9600);
  dht.begin();
}

void loop() {
  delay(2000);
  float temperature = dht.readTemperature();
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Suhu: ");
  lcd.print(temperature);
  lcd.print((char)223);
  lcd.print("C");
  
  if (temperature < 33) {
    digitalWrite(led, HIGH);
  } else if (temperature > 34) {
    digitalWrite(led, LOW);
  }
  
  if (temperature >= 45) {
    tone(buzzer, 1000);
  } else {
    noTone(buzzer);
  }
}