Monitor a UPS with a Raspberry Pi Zero W
After the recent snow apocalypse that swept through Texas followed by widespread power crisis, I realized that my UPS monitoring strategy needed improvement. One had batteries that were near death and my other two had loads that were not well balanced. I have a few CyberPower UPS units and an old APC UPS. Although CyberPower does offer relatively expensive monitoring cards that puts the UPS on the local network, none of them worked with my 1350/1500VA units....