ks0138 keyestudio EASY plug I2C 2004 LCD


Keyestudio Easy-plug 2004 I2C Module is a 20 character by 2 line LCD display with Blue background and White backlight. The original 2004 LCD needs 7 IO ports to be up and running, ours is built with Arduino IIC/I2C interface, saving you 5 IO ports. In Easy-plug control board, one IIC interface will suffice. This LCD is ready-to-use because it is compatible with the Arduino Liquid Crystal Library.

Note: this module needs to be used together with EASY plug control board.


Interface: Easy-plug

Communication protocol: I2C

I2C address: 0x27

Operating voltage: +5V

Contrast control: through potentiometer

Size: 113.8mm*60mm

Weight: 30g

Connection diagram

This module carries I2C interface, so we need to comply with I2C protocol in usage and corresponding head files must be included and added into the library.

Below is the connection diagram between this module and Easy-plug controller:

Sample code


//Compatible with the Arduino IDE 1.0

//Library version:1.1

#include <Wire.h>

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,20,4);  // set the LCD address to 0x27 for a 16 chars and 2 line display

void setup()


 lcd.init();                      // initialize the lcd


 // Print a message to the LCD.



 lcd.print("Hello, world!");




 lcd.print("Arduino LCM IIC 2004");


 lcd.print("Power By Ec-yuan!");


void loop()



Note: To ensure that this module will work properly, these two head files, namely Wire and LiquidCrystal_I2C, must be added into our library before code test.