If you are bored, please look over this link for programming
the BeagleBone Black Wireless and Relay Cape in C/C++ and Python3
with sysfs and libgpiod-dev/gpiod while using make and cmake.Relay Cape on Github
Here is another resource of source for another Cape, daughter card, for the
BeagleBone Black which carries the am335x processor from TI.com. This one is called the Servo Cape.Servo Cape on Github
The add-on is 50cm or roughly 19.75" XY along with a heightened gantry for the Z_axis
I made the machine work at 450mm * 152mm * 400mm with Klipper, a Recore A7, and Mainsail.
Here is a small video of the newer build plate along w/ a final product photo along w/ some building, i.e. glass bed!