[Nut-upsdev] APC USB UPS vs FreeBSD 6.x

Daniel O'Connor doconnor at gsoft.com.au
Mon Jun 1 10:47:31 UTC 2009

On Mon, 1 Jun 2009, Arjen de Korte wrote:
> Citeren Daniel O'Connor <doconnor at gsoft.com.au>:
> > PS the battery.date is odd, ie
> > battery.date: 1988/00/39
> > battery.mfr.date: 2008/12/08
> Most likely, this is a bug in the UPS firmware. This value is set by
> the HID path

I'm shocked to hear you say that ;)

>      UPS.Battery.APCBattReplaceDate, Type: Feature, ReportID: 0x1c,
> Offset: 0, Size: 24, Value: 14728.000000
> The reported value here (an APC specific one) should be a
> hexadecimal-as-decimal format like observed on other APC devices.
> However, APC seems to be using the standard way of encoding the date
> as written in the USB HID PDC specification and which is used for
>      UPS.ManufacturerDate, Type: Feature, ReportID: 0x7b, Offset: 0,
> Size: 16, Value: 14728.000000
>      UPS.Battery.ManufacturerDate, Type: Feature, ReportID: 0x20,
> Offset: 0, Size: 16, Value: 14728.000000
> which translate to 'ups.mfr.date' and 'battery.mfr.date'
> respectively. Note the difference in the size. The latter two
> correctly use 16 bits (as specified), but the first uses 24 bits
> (which is too much).

OK, so it needs another entry for this particular UPS? I wonder if there 
is some more general way of detecting this particular implementation..

Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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