For the purpose of making LibreCube projects modular and compatible to each other, we are working on the definition of the LibreCube Board Specification. It specifies the requirements of such boards in terms of mechanical, electrical, and communication interface.
The work package is here: https://librecube.blaucloud.de/index.php/s/dI0JmMtrJLqmu9T
The draft specification is in folder “workspace”
Please provide your comments/feedback here.