#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <OneWire.h>
#include <DallasTemperature.h>

#define ONE_WIRE_BUS 3 // Pin data sensor suhu DS18B20
#define I2C_ADDR 0x27 // Alamat I2C LCD 16x2
#define LED_PIN 2 // Pin LED
#define BUZZER_PIN 4 // Pin buzzer

OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
LiquidCrystal_I2C lcd(I2C_ADDR, 16, 2);

void setup() {
  sensors.begin();
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  
  lcd.init();                      
  lcd.backlight();
  lcd.begin(16,2);
  lcd.clear();
}

void loop() {
  sensors.requestTemperatures(); 
  float suhu = sensors.getTempCByIndex(0);
  
  lcd.setCursor(0, 0);
  lcd.print("Suhu: ");
  lcd.print(suhu);
  lcd.print(" C");
  
  delay(1000);
  // Kontrol LED dan buzzer
  if (suhu > 40) {
    digitalWrite(LED_PIN, HIGH); // Nyalakan LED jika suhu di 30 derajat Celsius
    tone(BUZZER_PIN, 1000); // Bunyikan buzzer
  } else {
    digitalWrite(LED_PIN, LOW); // Matikan LED jika suhu di bawah atau sama dengan 30 derajat Celsius
    noTone(BUZZER_PIN); // Matikan buzzer
  }
  
}