Scanner programs do not find a scanner

[JonG]

I am running KDE, unstable branch, on a RPI-5 with 8GB.
I have a network-connected HP DeskJet 3835, with a fixed IP.
None of the scanner programs I have tried identify the scanner, including simple-scan, skanlite, gscan2pdf. Also scanimage -L and sane-find-scanner do not find a scanner.
I have installed the ‘sane’ package.
I have not had this problem with earlier manjaro systems, or RPI-OS.
Also I know that there are no connection issues, as I can scan using the printer/scanner webserver by surfing to the scanner’s IP address. In addition, the printer is recognised by the system and prints as expected.
Any suggestions?

[tartanpion]

sane-airscan

[Phemisters]

I don’t use arm, so this might be unhelpful. When I had a similar problem I found that enabling the avahi-daemon.service helped; you might want to check if that is enabled and running on your system:

systemctl status avahi-daemon.service

and to try enabling it:

sudo systemctl enable --now avahi-daemon.service

If you have not already looked, there are some other notes on scanners:

https://wiki.archlinux.org/title/SANE#avahi-daemon_is_not_mandatory

(Edited to fix word order)

[JonG]

Thank you tartanpion and Phemisters. I needed to carry out both actions, but together they solved the problem. The scanner is now identified.

Also thank you Yochanan for making my post more visible.

(Sorry, the system only lets me mark one post as the solution, but both were needed)