Want a self contained module to drive a few hub75 RGB display matrices? Well look no further. Its got a battery backed RTC, and an SD card so that you can display fancy graphics. animated gif's or if your a spicy fellow, even converted video. Yes on an ESP32.  I used frame buffering so that the animated images are pulled from the SD card frame by frame, where normally they would be loaded into the memory of the esp32. 
The ESP32 does not have a ton of memory especially if your animations stretch into the megs. I use LVGL to convert scaled down (x,y matching the matrix) to RGB values. and then web interface on the software at github will then process those C image files to a .anim file which it will then use to display animations.

As it sits its a working device, it will fetch the time, store the current internet time in the RTC, check and start the SD card reader or ignore if its not there.  It will then fetch weather. (need API key ). and crypto prices.

Really all the magic happens in the arduino sketch. But could be configured to run just about any standard hub75 arduino firmware minus the RTC/SD reader bit as the lines driving the Hub75 are pretty universal in the Arduino world.


If you wanna pickup a matrixmate I sell them at my online store.
https://www.brokencircuitranch.com/shop/p/matrixmate