The last couple of months I haven't been all that busy working on this project. It has been on my mind constantly though, but life requires other sacrifices of worthwhile time.

I have been testing with the banana pi board, but quickly found that the 3v3 rail didn't work, so had to work around that by creating a 3v3 rail with an extra component, just to find out the board isn't reliable.

Sometimes it sits there at my desk for days, replying happily to network request to suddenly stop working and hanging. No kernel panic, nothing, just stops.

That's why I have decided to go with a real raspi. I'd love to go for a raspi zero 2 W, but couldn't get hold of one. 

So now I have bought (the much older) Raspberry Pi Zero W.

At least to go testing with. More later.