[Nut-upsdev] Fwd: [networkupstools/nut] Support for MicroLink APC UPSs (Issue #1426)

[Jim Klimov]

https://github.com/networkupstools/nut/issues/1426

Does anyone feel up to the challenge?

There's some research and python code to interact with MicroLink-only
serial APC models, waiting for a port into NUT...

---------- Forwarded message ---------
From: EetuRasilainen <notifications at github.com>
Date: Fri, May 13, 2022, 20:35
Subject: [networkupstools/nut] Support for MicroLink APC UPSs (Issue #1426)
To: networkupstools/nut <nut at noreply.github.com>
Cc: Subscribed <subscribed at noreply.github.com>


Hi there,

as you know APC is still manufacturing MicroLink-only UPSs. I have
purchased a APC SMC1000I and just found out that it could only be used as a
generic USB-HID UPS with NUT right now. And unfortunately the SMC-series is
not capable of ModBus so there are still APC devices out there which can
only use MicroLink for a full operation.

So I think it would be great if MicroLink-UPSs could be supported directly
by NUT at least through a serial connection. That's why I'd like to raise
this *feature request* here.

For testing purposes I have created a custom serial cable with this pinout
<https://pinoutguide.com/UPS/apc_0625_cable_pinout.shtml> and used the
following Python tool for checking the MicroLink communication with my unit:

https://github.com/klaasdc/apcups-serial-test

I was able to get information about my unit and even set the battery
installation date through MicroLink in a Python shell (with the help of some
sample code <https://github.com/klaasdc/apcups-serial-test/issues/1>). So
it seems like the protocol description is there, it's just written in
Python and needs to be ported to C. Unfortunately I am only familiar with
Python and not with C :(

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