#include <Arduino.h>
#include <LiquidCrystal_I2C.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#define DS18B20_PIN  4

LiquidCrystal_I2C lcd(0x27,16,2);
OneWire onewire(DS18B20_PIN);
DallasTemperature sensor(& onewire);

void setup() {
   Serial.begin(9600);
   lcd.init();
   lcd.backlight();
   sensor.begin();
}

void loop() {

  sensor.requestTemperatures(); // Send the command to get temperatures

  float temC = sensor.getTempCByIndex(0);
  lcd.clear();

  if(isnan(temC))
    {
      lcd.setCursor(0,0);
      lcd.print(" False ");
    }
    else
    {
      lcd.setCursor(0,0);
      lcd.print("NhietDo:");
      lcd.print(temC);
      lcd.print(" C");
      delay(1000);
    }
}