SKU0936 LCD Display backlight not working?
Roy.Shearer 2026-01-21 20:54:03 192 Views2 Replies I purchased a DFR0936 LCD Display shield from Pi hut, which described it as having a backlight:
https://thepihut.com/products/i2c-rgb-backlight-16x2-lcd-display-module
I have tried all the examples that come with the library, as well as the example from the wiki here:
https://wiki.dfrobot.com/_SKU_DFR0374__SKU_DFR0936_LCD_Keypad_Shield_V2.0
All seem to work with my Arduino Uno R3, but none make the backlight light up. Do I have a faulty display shield, or am I missing a bit of code to turn the backlight on perhaps?
I discovered that I failed to update the RGBaddr value to 0x2D in the code samples. The current shipping hardware version 2.0 does not work with the samples as posted to GitHub, as they have the version 1.0 address by default. The notes at the top of the source files are clear, but I didn't realize they were for v1.0 as posted.
With the address corrected, all works well!
Lou.Krieg Dear Customer,
Sorry for the inconvenience.
Please try uploading the example code from the Wiki and check whether the display effect matches the normal backlight shown in the photo below.
Wiki:
https://wiki.dfrobot.com/_SKU_DFR0374__SKU_DFR0936_LCD_Keypad_Shield_V2.0
To help us further investigate, could you please provide:
The code you are currently using
A photo of your hardware connection and the display status
You may also send the code and photos directly to our technical support team at [email protected], and our engineers will help you check it as soon as possible.
Best regards,
DFRobot Team
DFRobot TechSupport 
