Unfortunately, APC can be difficult to talk to with Linux. Some of them have a serial port (with a weird pin out), some can talk to the APC Windows program.

My experience was, I gave up on APC and went with a Linux friendly company. Probably doesn't help you, sorry!

You can try apcupsd and see if it works for you. Apparently it can talk over USB, if you can connect to the UPS with USB.

Duckduckgo "APC Linux" (or Google if you don't care about privacy ;-)


On August 15, 2024 4:51:23 PM MST, "Snyder, Alexander J via PLUG-discuss" <plug-discuss@lists.phxlinux.org> wrote:
>Does anyone in this community have any experience managing Network UPS?
>
>I purchased an "APC 3000VA Smart-UPS" (
>https://www.amazon.com/gp/product/B0785NCFMY) in 2020. It's been performing
>exactly as it should ever since, and life is great.
>
>However, when I've had it, I have experienced two or three "catastrophic"
>power outages (*line utility goes out*), and the UPS kicks in and does
>exactly what it is supposed to do.
>
>My problem is that in the time between buying the UPS and now, my homelab
>has grown significantly, and in one of those power outages, I
>overestimated my battery time, and my entire stack died while I was fucking
>around with one of the servers.
>
>In my most recent power loss, learning from the past, I raced downstairs at
>2AM with all the UPS alarms beeping loudly, and I raced to shut down the
>stack properly, knowing (*this time*) that I'd only got about 5 minutes of
>life. I got everything shut down this time, which is good—but it forced me
>to take a good hard look at some kind of Automated Shutdown.
>
>I've known for a long time that these things *could* happen, but I've never
>had a need to investigate. Well, here we are, LOL.
>
>I have the APS UPS connected to my switch, and it is getting a DHCP IP --
>and I can see ARP requests going back and forth -- my pfSense FW shows that *it
>is* sending/receiving data -- albeit just a few kilobytes here and there,
>but I know there is TCP/IP life on it -- but I'm at a loss beyond that.
>I've tried to SSH to it, but I just always get a "Connection Refused" --
>using the "default" credentials I found online, "apc/apc"...
>
>So yeah, anyone out there with any background or experience with Network
>UPSs, I'd love to chat with you to figure out how I can get into this thing
>and make it do what I'm absolutely certain it's capable of doing!
>
>--
>Thanks,
>Alex.

-- 
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