#include <Wire.h>
#include <LiquidCrystal_I2C.h>

// I2C address of LCD (check yours; usually 0x27)
LiquidCrystal_I2C lcd(0x27, 16, 2); // 16 columns, 2 rows

void setup() {
  lcd.init();          // initialize LCD
  lcd.backlight();     // turn on backlight
  lcd.setCursor(0, 0); // column 0, row 0
  lcd.print("Hi");     // display text
}

void loop() {
  // nothing needed here
}