work in progress!
For running on OpenWrt/LEDE targets such as Onion Omega1/Omega2, you may want to use the pixelboardd and pixelboard-config packages from the for-lede-master branch of plan44 feed.
All the drawings for lasercutting a 80x40cm pixelboard and the PCB designs for LED connectors, touch panels and onion omega2 based controller can be found in the pixelboard-hardware repository.