[Nut-upsuser] NUT support for the new Tripp Lite AVR700U (USB 3024) under OpenWrt?

[Feliciano Chavez]

Dears,

I'm trying to connect this new version of the AVR700U to nut - 2.7.4-27 running over OpenWrt 22.03.5, installed from the stable release repositories, for an ath79 USB2.0 gigabit WiFi router.

According to the supported list, I thought this UPS was supposed to use the USB 2010 protocol, but I guess that was an old version because now uses the 3024 protocol (perhaps it would be good to add a note for future buyers).
root at Router:/# lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux 5.10.176 ehci_hcd EHCI Host Controller
Bus 002 Device 002: ID 09ae:3024 Tripp Lite AVR700U
Bus 002 Device 001: ID 1d6b:0001 Linux 5.10.176 ohci_hcd Generic Platform OHCI controller

Under networkupstools at github, I noticed the issue 808, which states this could be (partially) supported by including the vendor id and productid in ups.conf. Therefore, for the OpenWrt use case, I would have to add the following to /etc/config/nut-server:
config driver 'tripplite'
      option driver usbhid-ups
      option port auto
      option vendorid 09ae
      option productid 3024
This avoids the previous 3024 "not supported" error message,
root at Router:/# upsdrvctl start
Network UPS Tools - UPS driver controller 2.7.4
Network UPS Tools - Generic HID driver 0.41 (2.7.4)
USB communication driver 0.33
Using subdriver: TrippLite HID 0.82

but still can't connect to the UPS:
root at Router:/# upsc tripplite
Error: Driver not connected

So I kindly ask you what could we do in this case

Note: I haven't seen an udev rules file under the running OpenWrt.

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