#include <OneWire.h> // include the OneWire library for temperature reading
#include <LiquidCrystal_I2C_Hangul.h> // include the LiquidCrystal_I2C_Hangul library for LCD display

// define the pins for the relay and temperature sensor
const int RELAY_PIN = 7;
const int TEMP_SENSOR_PIN = 10;

// initialize the OneWire temperature sensor
OneWire tempSensor(TEMP_SENSOR_PIN);
byte addr[8];

// initialize the I2C LCD display
LiquidCrystal_I2C_Hangul lcd(0x3F, 16, 2);

void setup() {
  // initialize the relay pin as an output
  pinMode(RELAY_PIN, OUTPUT);

  // initialize the LCD display
  lcd.init();
  lcd.backlight();

  // find the address of the temperature sensor
  if (!tempSensor.search(addr)) {
    Serial.println("Temperature sensor not found.");
    while (true);  // loop forever
  }
}

void loop() {
  // reset the temperature sensor
  tempSensor.reset();

  // send a command to start temperature conversion
  tempSensor.write(0x55);
  tempSensor.write(addr, 8);

  // wait for temperature conversion to finish
  delay(750);

  // reset the temperature sensor
  tempSensor.reset();

  // send a command to read the temperature
  tempSensor.write(0xBE);
  tempSensor.write(addr, 8);

  // read the temperature data
  byte data[12];
  for (int i = 0; i < 12; i++) {
    data[i] = tempSensor.read();
  }

  // convert the temperature data to Celsius
  int tempInt = (data[1] << 8) | data[0];
  float tempC = (float)tempInt / 16.0;

  // display the temperature on the LCD screen
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(tempC, 1);
  lcd.write(0xDF);  // degree symbol
  lcd.print("C");

  // turn the relay on or off depending on the temperature
  if (tempC >= 62.0) {
    digitalWrite(RELAY_PIN, LOW);
  } else if (tempC <= 58.0) {
    digitalWrite(RELAY_PIN, HIGH);
  }

  // wait for a moment before taking another temperature reading
  delay(5000);
}