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Issues with UPS monitoring

Community Edition

I am trying to set up my UPS (SMART1500LCD) with my truenas installation (TrueNAS-25.04.2.1) and it plugs into the system over USB.

In the monitoring section, it seems like the system is polling inconsistently and saving null responses. Here is an example of after I just plug it in. You can see that it only displays valid information every once and a while.

https://preview.redd.it/6hp0pfzkixsf1.png?width=1667&format=png&auto=webp&s=30fdb4f77df183f71b4b8df8701960425e13c3b6

This is my config for the UPS in Truenas.

https://preview.redd.it/2ryelkhvixsf1.png?width=796&format=png&auto=webp&s=1d4d2a71396e4d7a5022b61eab438fa3daec0634

with the only addition of `pollinterval = 60` in the auxiliary parameters.

Do you guys know how I can fix this behaviour so that the data is consistent?

Posted Oct 3, 2025, 5:13 PM UTC

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