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

void setup()  
{  
  lcd.init();            
  lcd.backlight();       
  lcd.setCursor(0, 0);   
  lcd.print("Hello, world!"); 
}  

void loop()  
{  
 
}