Recently I decided to connect an UPS (uninterruptible power supply) at work to one of the devices that runs 24 hours a day. The UPS that we currently have is the APC Back-UPS 1400 (Back-UPS XS 1400U), in addition to the ability to connect up to 6 devices, allows you to monitor the status of the device using the PowerChute software via USB port.
The problem is that this software is not compatible with the server we use, since it is available in a version for personal use (Personal Edition).
So I decided to use one free port (we use another one for additional internet connection using a 4G router) to connect a UPS to it to monitor its status (this device does not have a display apart from two diodes). If we can do something more, it would be even better, but it all depends on what can be achieved using OpenWrt.