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
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Toothbrushing Instructor LinkIt ONE Pager LinkIt ONE IoT Demo
enter image description here enter image description here enter image description here
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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.

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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.

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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.

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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

Welcome to the new documentation system of Seeed Studio. We have made a lot of progress comparing to the old wiki system and will continue to improve it to make it more user friendly and helpful. The improvement can't be done without your kindly feedback. If you have any suggestions or findings, you are most welcome to submit the amended version as our contributor via Github or give us suggestions in the survey below, it would be more appreciated if you could leave your email so that we can reply to you. Happy Hacking!