Re: [Apcupsd-users] apcupsd not showing any UPS load

[Jeffery S. <je...@cj...>]

Trev via Apcupsdusers <apc...@li...> writes:

>Jeffery Small wrote on 27/11/25 10:56 am:
>> Xubuntu:    24.04.3
>> apcupsd:    3.14.143.1build2  (standard Ubuntu package)
>> UPS:	    New APC SMC1500C with USB connection
>> 
>> I just built a new Linux workstation with a new APC UPS.  Everything is
>> running fine except that the monitor is showing no load despite all of
>> my equipment plugged into the UPS.  Here is a link to a screenshot:
>> 
>> http://cjsa.com/misc/apcupsd_01.png
>> 
>> Any reason that this is happening?  On my previous system with the same UPS
>> which was more than five years old, all of this worked fine.  Could this
>> be a configuration issue? 

>It is unclear to me whether you are using the same UPS. You say it's a 
>new APC UPS and later the same UPS. I'd hazard a  guess that it is a new 
>UPS and very probably has a different firmware. APC's USB firmware 
>versions have been notoriously buggy. Is there a firmware update for the 
>new UPS? If so, apply it and hope.

>Alternatively:

>1) try the modbus protocol as someone has already helpfully suggested; or
>2) try a USB->RS232 converter if you have a serial port on your new 
>computer.

It is a new UPS but when I said it was the same, I meant identical model:
SMC1500C hooked up the same using USB.

Thanks for the suggestions, both from you and other.  I'll report if I
have success.  I'll see if there is new firmware and load it.  I have been
loath to connect the UPS to the network because it looks like Schneider
has go the route of Microsoft and others and wants to own and control your
equipment.  I don't want them on my LAN. :-(

Do people think that the self-test option should work through the apcupsd,
or is this failure to be expected?  I guess I can run self test from the
front panel and see if apcupsd then recognizes it.

Regards,
-- 
Jeffery Small