#include <dht.h>
#include <LiquidCrystal_I2C.h>
#define relay 3
#define buzzer 8
int red = 13;
int green = 12;
dht DHT22;
bool buzzerFlag = false; // Flag untuk melacak status buzzer
LiquidCrystal_I2C lcd(0x27, 20, 4);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(2, INPUT);
  pinMode(relay, OUTPUT);
  pinMode(buzzer, OUTPUT);
  pinMode(red, OUTPUT);
  pinMode(green, OUTPUT);

  lcd.init();
  lcd.clear();
  lcd.backlight();

  tone(buzzer, 1000);
  delay(225);
  tone(buzzer, 1500);
  delay(225);
  tone(buzzer, 2000);
  delay(225);
  noTone(buzzer);
  delay(275);
}

void loop() {
  // put your main code here, to run repeatedly:
  int readData = DHT22.read22(2);
  int temp = DHT22.temperature;
  int tempf = 1.8 * temp + 32;
  int humid = DHT22.humidity;

  lcd.setCursor(0, 0);
  lcd.print("Tempratur:");
  lcd.print(temp);
  lcd.write(0xDF);      // Simbol derajat
  lcd.print("C/");       // Celcius
  lcd.print(tempf);
  lcd.write(0xDF);      // Simbol derajat
  lcd.print("F ");      // Fahrenheit
  lcd.setCursor(0, 1);
  lcd.print("Kelembapan: ");
  lcd.print(humid);
  lcd.print("%");

  if (temp >= 28) {
    digitalWrite(red, HIGH);
    digitalWrite(green, LOW);
    digitalWrite(relay, HIGH);
    lcd.setCursor(0, 2);
    lcd.print("Suhu panas ");
    lcd.setCursor(0, 3);
    lcd.print("Meyalakan kipas");

    if (!buzzerFlag) { // Jika buzzer belum berbunyi
      tone(buzzer, 2000, 500);
      buzzerFlag = true; // Tandai bahwa buzzer sudah berbunyi
    }
  } else {
    digitalWrite(red, LOW);
    digitalWrite(green, HIGH);
    digitalWrite(relay, LOW);
    lcd.setCursor(0, 2);
    lcd.print("Tidak panas");
    lcd.setCursor(0, 3);
    lcd.print("Kipas dimatikan");
    buzzerFlag = false; // Reset flag ketika suhu kembali normal agar dapat berbunyi kembali ketika suhu panas
  }
  delay(1000);
}