[Nut-upsuser] Can't get CyberPower UPS to work with Raspberry Pi 4
clepple at gmail.com
Thu Oct 29 01:32:02 GMT 2020
On Oct 26, 2020, at 9:38 AM, Gene Heskett <gheskett at shentel.net> wrote:
>>> battery.voltage: 24.0
>>> battery.voltage.nominal: 24
>> I don't have the citation handy, but I think another user reported
>> that the battery.voltage returned by the UPS is a constant 24.0 V,
>> regardless of the actual battery voltage.
> I think it may be dependent on thhe ups. I have a 625 WA cyberpower on an
> rpi4, and I believe its more truthfull. Is this helpfull?
You're right, the lack of a battery voltage sensor isn't true for all CPS hardware.
I was trying to make the point that the 24.0 V reading is suspect, while covering the cases where broken scaling means that NUT displays it as 16.0 V.
However, back in January, we discussed the input.transfer.high/.low issue: https://alioth-lists.debian.net/pipermail/nut-upsuser/2020-January/011668.html
The root cause of that is closer to some of the other CPS issues, like the "output.voltage: 137.0" that Robert posted.
That upsc dump is useful. For completeness, could you (and Robert) please post the output of "upsrw myups" and "upscmd -l myups"?
I manually grep through upsc output to find these sorts of things, but some day, I'd like the DDL[*] to be able to show a table of UPS models and their supported NUT variables. (Something like a hardware comparison on a vendor website, but from the perspective of what NUT can read.)
[*] e.g. https://networkupstools.org/ddl/Cyber_Power_Systems/
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