5.0V I2C
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I2C_LCD is an easy-to-use display module, It can make display easier. Using it can reduce the difficulty of make, so that makers can focus on the core of the work.
We developed the Arduino library for I2C_LCD, user just need a few lines of the code can achieve complex graphics and text display features. It can replace the serial monitor of Arduino in some place, you can get running informations without a computer.
More than that, we also develop the dedicated picture data convert software (bitmap converter)now is available to support PC platform of windows, Linux, Mac OS. Through the bitmap convert software you can get your favorite picture displayed on I2C_LCD, without the need for complex programming.
I2C_LCD can provide you with a very convenient way of make. Enjoy yourself!

Product Version

VersionHow to buy
I2C_LCD (With universal Grove cable)enter image description here
I2C_LCD (With conversion Grove cable)enter image description here


  • Only 2 Arduino pins are occupied (Use I2C interface).
  • Supports standard I2C mode (100Kbit/s) and fast I2C mode (400Kbit/s).
  • Compatible with multiple communication logic levels: 2.8~5VDC.
  • Arduino library supported, use a line of code to complete the display.
  • Integrate 7 sizes of ASCll fonts, 5 graphics functions.
  • Provide dedicated picture data convert software (Bitmap Converter).
  • Most of the complex operation is processed by I2C_LCD independent controller, saving user controller resources.
  • Supports cursor function, can set up 16 cursor flicker frequency.
  • Supports 128 level backlight lightness adjustment.
  • Support 64 level screen contrast adjustment.
  • Support device address modification.
  • Supports 127 I2C_LCD work in parallel.
  • When debugging code, it can take the place of the serial monitor to monitor the program running state.
  • Two abnormal recovery methods are provided: reset and restore the factory settings.
  • Compatible with Grove interface and 4Pin-100mil interface (under the Grove socket).
  • 4 symmetrical fixed hole design for easy user installation.
  • China style unique appearance.

Platforms Supported

ArduinoWioBeagleBoneRaspberry PiLinkIt ONE
The platforms mentioned above as supported is/are an indication of the module's hardware or theoritical compatibility. We only provide software library or code examples for Arduino platform in most cases. It is not possible to provide software library / demo code for all possible MCU platforms. Hence, users have to write their own software library.

Interface Function

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Screen TypeDual colour LCD
Screen Resolution128*64 Pixels
Screen Active Area (L*W)47.1*26.5mm
Individual Pixel Size0.33*0.33mm
Communication ModeI2C(100Kbit/s and 400Kbit/s)
Operating Frequency16 MHz

Electrical Characteristics

Supply voltage(5V to GND)4.555.5V
Logic Voltage(SCL/SDA)2.855.5V
HBM ESD-5000-V

Application Ideas

Here is some funny project for your reference.
Display PictureClock With CalendarUsed As Debuger
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Make it NowMake it NowMake it Now
Automatic HumidifierSnake Game
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Make it NowMake it Now

Getting Started

Step 1: Install the latest version of Arduino IDE to your computer.
Step 2: Download and install the I2C_LCD library to Arduino IDE:
Open Arduino IDE, click Sketch -> Include library -> Add .ZIP library.
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Find and select the I2C_LCD.zip file you just downloaded.
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Restart the Arduino IDE.
Step 3: Chose the example project which you like. (Take “HelloWorld” project for example here.)
Click File > Examples > I2C_LCD > HelloWorld
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Step 4: Connect I2C_LCD to your Seeeduino Vx board with Grove cable. Then connect Seeeduino Vx board to your computer.
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Step 5: Select your board and serial port.
Select the board: Click Tools > Board > “Arduino Duemilanove or Diecimila”(Seeeduino V3.0 Or early version), “Arduino Uno”(Seeeduino Lotus or Seeeduino V4.0).
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Select the COM: Click Tools -> Serial Port -> COMX(which connected with your board.)
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Step 6: Upload the program and enjoy yourself!
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  1. For more details about library install please refer to http://www.arduino.cc/en/Guide/Liaries.
  2. If you encounter other problems during the use, please refer to the User Manual for help. If you can’t solve it, please contact us.
Technical support: Joney.s@foxmail.com

Version Tracker

I2C_LCD Hardware:
RevisionRelease NoteRelease Date
I2C_LCD_v1.21. Add production test point.Sep 18, 2015
I2C_LCD_v1.11. Modify the logo position. 2. Modify the board shape. 3. Modify the button position.May 8, 2014
I2C_LCD_v1.01. Modify the power circuit wiring.Mar 1, 2014
I2C_LCD_v0.9b1. Initial public release.Feb 15, 2014
I2C_LCD Library:
RevisionRelease NoteRelease Date
I2C_LCD_v1.21Support LinkIt boards.Aug 21, 2016
I2C_LCD_v1.20Reorganize I2C_LCD driver interface, make it easy to transplant to any other boards.Apr 16, 2016
I2C_LCD_v1.12Modify the bug that can’t display bitmap when y coordinate is more than 16.Sep 4, 2015
I2C_LCD_v1.11Modify the bug that ‘\t’ can’t print.Jun 27, 2015
I2C_LCD_v1.101.Add LCD print function. 2.Edit DeviceAddressConfig example.Jun 25, 2015
I2C_LCD_v1.0Initial public release.July 6, 2014


Keeping update the latest version.
The repository of Arduino library hosted here, if you have any good idea of the code, you can pull to us.

Help us make it better

Thank you for choosing Seeed. A couple of months ago we initiated a project to improve our documentation system. What you are looking at now is the first edition of the new documentation system. Comparing to the old one, here is the progresses that we made:
  • Replaced the old documentation system with a new one that was developed from Mkdocs, a more widely used and cooler tool to develop documentation system.
  • Integrated the documentation system with our official website, now you can go to Bazaar and other section like Forum and Community more conveniently.
  • Reviewed and rewrote documents for hundreds of products for the system’s first edition, and will continue migrate documents from old wiki to the new one.
An easy-to-use instruction is as important as the product itself. We are expecting this new system will improve your experience when using Seeed’s products. However since this is the first edition, there are still many things need to improve, if you have any suggestions or findings, you are most welcome to submit the amended version as our contributor or give us suggestions in the survey below, Please don’t forget to leave your email address so that we can reply.
Happy hacking