Hi Charles -
The APC units I have are dumb-serial. Back-UPS 500, Back-UPS-600 and
Back-UPS-650. They use serial cable 940-0020B. They are listed in
apcupsd as "Dumb UPS". The sticker on the back says "Model BK650MC".
Reading through the docs you linked, I cannot tell for sure if these are
supported.
Here is a sample output from apcupsd:
=======================
Date Range: yesterday
APC : 001,018,0458
DATE : 2026-02-07 07:46:29 -0600
HOSTNAME : zoneminder2
VERSION : 3.14.14 (31 May 2016) redhat
UPSNAME : zoneminder2
CABLE : APC Cable 940-0020B
DRIVER : DUMB UPS Driver
UPSMODE : Stand Alone
STARTTIME: 2026-02-07 07:46:24 -0600
STATUS : ONLINE
MBATTCHG : 5 Percent
MINTIMEL : 3 Minutes
MAXTIME : 0 Seconds
NUMXFERS : 0
TONBATT : 0 Seconds
CUMONBATT: 0 Seconds
XOFFBATT : N/A
STATFLAG : 0x05000008
END APC : 2026-02-12 03:29:01 -0600
=========================
===============
Bill Gee
On 2/11/26 21:53, Charles Lepple wrote:
On Feb 6, 2026, at 1:18 PM, Bill Gee wrote:
I have several VERY old APC devices - so old they use serial ports for
monitoring. I would love to get them off apcupsd, but nothing else will work.
They support fairly modern Linux systems - Fedora 43 and Alma 9.
Interestingly, NUT has *two* serial APC drivers, and I vaguely remember that
there are older units that fall through the cracks even with those two:
- https://networkupstools.org/docs/man/apcsmart.html (has some tips for
identifying generations)
- https://networkupstools.org/docs/man/apcsmart-old.html
That said, between the logs from the working apcupsd code, and debug logs from
maybe apcsmart-old, we should be able to figure something out.
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