I had a need to be able to send messages to an RGB LED panel quickly and easily. I used MQTT as all my other MQTT clients and servers would be able to send messages directly to the panel.
All the code, libraries, images and everything else is run from within a Docker container - showing you also just how easy it is to setup hardware based projects using Docker.
On the hardware side, a Pi ZeroW along with an AdaFruit RGB matrix Pi hat and a 64x64 panel. Although any number of panels and sizes can be used.