Hi Tobias,

Thank you for testing this! Unfortunately "sometimes it doesn't work" is very hard to fix, much harder than "when I do this...it fails like this..."!

Given the very long time to connect and that most of the time it works OK I think the problem is in the actual communication with the board. I saw in Picochess that when connecting to a BT board they seem to close the COM port connection and pair using BT commands. Perhaps this is why.

I'll look into it but I'm not sure if I can do anything without having my own board to experiment with.

All the best.