Thank you Volker, understood.

Thank you for your reply Volker. I would like to have a UPS shutdown the RevPi when the UPS battery is exhausted and turn it on again when the main power supply is restored. This is to avoid the risk of corruption of the OS or other data storage (USB flash) if the main power supply fails. So a hardw...

Is there a way to safely shutdown the RevPi Core without having to establish an SSH session, log in as root or sudo user, and issue shutdown command?

Thanks.

I see that the Pi Bridge connector on the RevPi Core has two RS485 interfaces on pins A9+A10 and B9+B10. Can these be used as regular RS484 ports i.e can they be made to appear as /dev/ttySX etc. to the OS? If so, what are the voltage levels and what is the Pi Bridge connector type?

Thank you.