just got one, but I can't access the serial connection pins yet.
at least without breaking something.
the base seem to contain the power regulator, everything else is in the top.
it can be unscrewed from the big heat-sink but that doesn't help because the 2 parts are still attached to one another via the cable.

to access the electronic the plastic cover has to be removed. has anyone successfully accomplished that without breaking it?

once I accomplish that, I'd like to help testing the tasmota firmware for the B1