Build an MQTT based RGB LED panel! // Project


Thanks mate! I’ll check it out.


Problem with config.txt. Where you edited config.txt in the section called “SD card changes”, this caused RPi3ModB+ to hang during boot. I’m using raspbian GNU/Linux 9 (stretch). The suggested modifications dtparam=audio=off and
dtoverlay=dwc2 caused the boot to hang. I’ll let you know more if the program doesn’t work without these changes.


Hi Larry,
How did those changes go? Surprised it hung the Pi. They’re pretty common config options.


I finally got the display running on my Pi Zero W . I am using all the same part indicated in the project. The problem i am having is with the graphics. They are not displaying correctly on both of of the systems i built for my nephews.
Does anyone have a corrective action for this?


Ah, that would be a bug in the code.
I’ve been meaning to rewrite this in GoLang and have been looking at it this last week.
Hopefully I’ll have it finished by the end of next week.


Thanks Mick,
My Nephews are looking forward to getting this to work.


I have the solution for you! look at this Adafruit page - Step 3 about 64x64 matrixes -

I had to blob signal E to GPIO Pin 8 like the picture shows and presto!!!

Good luck with your project!


Thanks for the reply.
I will try it tonight.
Thanks Again!


Mick, I am getting the same problem as Face_Death. Do you know where I might be able to find the updated code? Thank you for this project, I hope I can get it working!


Did you ever get it to work for you? I am running into the same issues that you posted about.


Yes, just soldered the contact indicated by Geroge_Lindner as indicated on board, Thanks Again! and the display came up correct. Just ran into other problems with the time displaying correctly. Have not had a chance to review this issue. Not a fan of MQTT, probably because i don’t fully understand the operation and control of it.


Sorry guys, I’ve been pretty busy of late and haven’t had a chance to update the code.
Hopefully I’ll get to it in the next couple of weeks.