I2C 20x4 Character LCD Display Module for Arduino (Blue Backlight)

Introduction This is a 20x4 Arduino compatible LCD display module with high speed I2C interface. It is able to display 20 characters per line across 4 lines, white characters on blue background.Generally, LCD display will run out of Arduino pin resource. It needs 6 digital pins and 2 power pin for a LCD display. If you want to build a robot project, it will be a problem with Arduino UNO and LCD display.  This I2C 20x4 LCD display module is designed for Arduino microcontroller. It is using I2C communication interface, With this I2C interface, only 2 lines (I2C) are required to display the information on any Arduino based projects. It will save at least 4 digital / analog pins on Arduino. All connector are standard XH2.54 (Breadboard type). You can connect it with jumper wire directly. 

This 20x4 LCD module has 8 I2C address in all, from 0x20 to 0x27. You can set one according to your requirements, avoiding the confliction of I2C address. And its contrast can be adjusted manually. 
This board is able to be powered by 5V or 3.3V which make it compatible with Arduino UNO / Mega / ESP32 / Raspberry Pi with I2C note. 

There is an alternative I2C 1602 LCD screen available for less character.  

Last update: V1.2:

• I2C connector:  VCC, GND, SCL, SDA

 

Specification

• I2C Address: 0x20-0x27(0x20 default)
• Number of Characters: 20 characters x 4 Lines
• Blue LED backlight with white char color
• Adjustable contrast
• Supply voltage: 5V(via Pin)  3.3V(via IDC10)
• Interface: I2C/TWI x1,IDC10 x2
• View direction: Wide viewing angle
• Dot size: 0.55 x 0.55 mm(0.02x0.02")
• Dot pitch: 0.60 x 0.60 mm(0.023x0.023")
• Character size: 2.96 x 4.75 mm(0.11x0.19")
• Character pitch: 3.55 x 5.35 mm(0.14x0.21")
• Size: 98x60x24mm (3.86x2.36x0.94")

Shipping List

• I2C 20x4 Arduino LCD Display Module  x1

Documents

• Wiki page
• Schematic 
• Arduino Sample code
• Arduino LCD Screen Library (compatible with IDE V1.0 and earlier)
• LCD datasheet
• PCA8574 Datasheet