Hi @Pukka Paul,
Close to production… I’ve got a functioning prototype which I’ve put together in the Megni lab, I’ve got more to do on the software side of things, added functionality for the ESP / SD card should be soon, what I want is to be able to download a txt file of the logged data, getting there…
See Small DC power datalogger for 48V ebikes
for a compact version of something similar I’m developing in parallel.
Bests,
Dan