Hi HA-ers,
A couple of years ago a friend and I tried to build the ultimate pcb design/hardware for my Home-Assistant.
Project name Tenney.
With zero knowledge on pcb designs I came quite far. But in the end, I must give up for several reasons (funding, Corona, lack of knowledge etc…)
I totally forgot about it until recently. So, I thought I just upload the files to Home-assistant and let the community decided what to do with it.
The files can be opened with Eagle or Kicad.
I know for a fact that there is a problem with the level converter which converts 5 volts to 3,3 volts.
There are probably more 
The idea behind it was to create a modular pcb based on a Raspberry-Pi.
The supported protocols/hardware are shown in the bellow picture
First printed circuit.
Link to working led’s
leds
Link to the files:
pcb_files
I’m not giving support since I have ended this project on my side.
Though I’ll try to give some answers if needed in this topic.
You are free to use the files as you like.
Regards,
Passie