[amenonsen]

> Thanks for the awesome write-up.

Glad you enjoyed it. :-)

> I have considered doing something totally ridiculous like setting up a Raspberry Pi with a camera and machine vision software to watch the LED displays on these devices to glean status information. Silly, but...

Ha! I actually have a PoE camera pointed at the display of my UPS. Here's what it looks like right now: https://toroid.org/misc/ups-display.jpg

Notice that horizontal blank row of dead pixels halfway down the right side of the display? The one that makes "54.6" look like "51.6"? That gap defeated my naïve five-minute attempt to use image recognition to extract the battery voltage.

[all2]

I would be tempted to tie the LED lines to digital ins on an Arduino. I'm betting some finagling with the display data lines could get you the information from the display, as well.

Depending on how the cabling to that display works, you might be able to do all of that without having to disable the display.