Grove - LCD RGB Backlight


enter image description here Done with tedious mono color backlight? This Grove enables you to set the color to whatever you like via the simple and concise Grove interface. It takes I2C as communication method with your microcontroller. So number of pins required for data exchange and backlight control shrinks from ~10 to 2, relieving IOs for other challenging tasks. Besides, Grove - LCD RGB Backlight supports user-defined characters. Want to get a love heart or some other foreign characters? Just take advantage of this feature and design it! This product is a replacement of Grove - Serial LCD. If you are looking for primitive 16x2 LCD modules, we have green yellow backlight version and blue backlight version on sale also.


This document work for Version 1.0, 2.0 and 4.0.


  • RGB Backlight
  • I2C communication
  • Built-in English fonts
  • 16x2 LCD


More details about Grove modules please refer to Grove System


Intem Value
Input Voltage 5V
Operating Current <60mA
CGROM 10880 bit
CGRAM 64x8 bit

Application Ideas

  • Human Machine Interface
  • Smart House
  • Sensor Hub

Here are some projects for your reference.

Edison Wi-Fi Address WiFi Enabled Greenhouse Grove Lucky Dumpling
enter image description here enter image description here enter image description here
Make it Now! Make it Now! Make it Now!
Toothbrushing Instructor LinkIt ONE Pager LinkIt ONE IoT Demo
enter image description here enter image description here enter image description here
Make it Now! Make it Now! Make it Now!

Getting Started

This getting started will show you how to use Grove - LCD RGB Backlight, we need a Seeeduino as well.


This demo is under Win10 and Arduino IDE1.6.9.

STEP1. Download Arduino Library

You need to download the library and install to your Arduino IDE.

Please follow how to install an arduino library procedures to install LCD RGB Backlight library.

enter image description here

STEP2. Hardware Installation

Hardware installation is very easy, because there’s an I2C Grove in Seeeduino, so what we need to do is to connect it to I2C Grove via a Grove cable.


Please select 5v via the toggle switch on Seeeduino V4.2, otherwise the Grove - LCD RGB Backlight may not function properly.

// image 1

STEP3. Download Code and Upload

You can download the demo code in Github, click here, then extract it to anywhere.

If you have some problem with this step, please refer to Getting Start with Seeeduino there is a Hello World example in the library, open it, and upload to Seeeduino V4.2. Then you can see “Hello world” on the first row, and second row will print the number of second since reset.

// image 1

STEP4. Change Color of Backlight

One of Grove - LCD RGB Backlight’s most important feature is: you can change the color backlight, and it’s a very simple thing, just use the following function:

void setRGB(int r, int g, int b);

Then let’s try a Red backlight. Modify the code about color into:

const int colorR = 255;
const int colorG = 0;
const int colorB = 0;

Upload the code again, woo, see the backlight turn to Red? Then why not try another color? Whatever you like.


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