Finally done. This picture illustrate the 3 different grounds and the space between the areas that is part of the galvanic isolation. Finally got everything on and routed, so will double check tomorrow (or later today) and order PCB’s. Hopefully this is my x-mas fun project, but I don’t really expect to see the PCB’s before early January due to x-mas post.
I was thinking about adding a LCD display and by irony I actually have. I have a UART on the SWD port that is perfect for usage together with a Nextion display.