باشه حتما... فقط لایبرری رو به همون اسم liquidcrystal تغییر نام بدین.
/*
** Example Arduino sketch for SainSmart I2C LCD Screen 16x2
** based on 
https://bitbucket.org/celem/sainsmar...ainlcdtest.ino
** by
** Edward Comer
** LICENSE: GNU General Public License, version 3 (GPL-3.0)
** This example uses F Malpartida's NewLiquidCrystal library. Obtain from:
** 
https://bitbucket.org/fmalpartida/new-liquidcrystal 
** Modified - Ian Brennan ianbren at hotmail.com 23-10-2012 to support Tutorial posted to Arduino.cc
** Written for and tested with Arduino 1.0
**
** NOTE: Tested on Arduino Uno whose I2C pins are A4==SDA, A5==SCL
*/
#include <Wire.h>
#include <LCD.h>
#include <LiquidCrystal_I2C.h>
#define I2C_ADDR    0x27 // <<----- Add your address here.  Find it from I2C Scanner
#define BACKLIGHT_PIN     3
#define En_pin  2
#define Rw_pin  1
#define Rs_pin  0
#define D4_pin  4
#define D5_pin  5
#define D6_pin  6
#define D7_pin  7
int n = 1;
LiquidCrystal_I2C    lcd(I2C_ADDR,En_pin,Rw_pin,Rs_pin,D4_pin,D5_pin,D6  _pin,D7_pin);
void setup()
{
  lcd.begin (16,2); //  <<----- My LCD was 16x2
  
// Switch on the backlight
lcd.setBacklightPin(BACKLIGHT_PIN,POSITIVE);
lcd.setBacklight(HIGH);
lcd.home (); // go home
  lcd.print("SainSmartI2C16x2");  
}
void loop()
{
  // Backlight on/off every 3 seconds
  lcd.setCursor (0,1);        // go to start of 2nd line
  lcd.print(n++,DEC);
  lcd.setBacklight(LOW);      // Backlight off
  delay(3000);
  lcd.setBacklight(HIGH);     // Backlight on
  delay(3000);
}
LiquidCrystal_V1.2.1.zip