4 ms·
>> TL;DR: Despite otherwise seeming to work correctly, I can’t monitor a Back-UPS BX1600MI in Linux without seeing a constant stream of spurious battery detach/
by ethbr1 3y ago
>> TL;DR: Despite otherwise seeming to work correctly, I can’t monitor a Back-UPS BX1600MI in Linux without seeing a constant stream of spurious battery detach/reattach and power fail/restore events that last less than 2 seconds each.
It sounds like the Windows software probably debounces the incoming events, only bubbling up those that are sufficiently time-stable, to account for bargain sensor false positives?
Edit: Looks like the apcupsd collection also has some EEPROM programming utilities... (for supported devices) http://www.apcupsd.org/manual/#configuration-directives-used-to-set-the-ups-eeprom http://www.apcupsd.org/manual/#configuration-directives-used...
- bell-cot 3y agoI'd bet you're right. Experience at $Job is that certain cheapo UPS's can be miserably twitchy about detecting power problems and switching to their inverters. After a week of the clickity-clicks of the cut-over relays - $Employee and his office mates may ask for the UPS to be removed.
- bulk88 3y agoRight, the window tool debounces the events, IMO the battery attach/disconnnect messages are a poor mans heartbeat signal on the protocol. That ACPI/Windows didn't "sleep" the USB port, or that the controller in the UPS (chinese junk) didn't crash.