#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  lcd.init();  
  lcd.backlight(); 
}

void loop() {
  lcd.setCursor(0, 0);
  lcd.print("Xin chao ");
  lcd.setCursor(0, 1);
  lcd.print("123");
}