Sounds awesome, given it died could you publish the source? Would be great to see how something like this is structured.
(we pushed to open source the guts, but to no avail)
Both of us reminisce about it though. We literally retooled the fleet of devices in a weekend to adapt to COVID and it worked. We interfaced with tons of hardware and even ran a customized debian image, all powered by RPis. Truly a nerd's dream project.