Hi. We finally found an HP DeskJet 2723e at a closer vendor; in terms of price and bulk it was much closer to to or needs the one we had and the cat broke.
I first set it up on wifi only. I used the proprietary HP application on my phone, it used bluetooth to give the wifi password to the printer. I confirmed with the router it was connected and set up a static DHCP lease. After that, I could connect to the printer using <https://10.0.1.17:631/>. Setting up printing was as easy as: sudo lpadmin -p DeskJet_2723e -v http://10.0.1.17:631/ -E -m everywhere (by the way, "driverless" is a nice advertisement gimmick, but really it is a misnomer for an unified driver) and printing a test page worked right away. I could also scan using the web interface. SANE offered a little more resistance tough. But first I had to re-configure it for another wifi network. This time I tried doing it with USB. Installing ipp-usb and plugging the printer starts a ipp-usb.service and a web server on <http://localhost:60000/> where I could change the wifi settings. The web-server seems extremenly bogus, I had to reload the page numerous times before getting something workable. Once the printer connected to its final network, I tried SANE seriously. To let SANE auto-detect the device, I had to: sudo hp-setup -i 10.0.1.17 to let it create a second queue "hp:/net/DeskJet_2700_series?ip=10.0.1.17". But it still refused to work. For some reason, scanimage sends its useful messages to syslog instead of stderr. I had: unable to load library libm.so: /lib/x86_64-linux-gnu/libm.so: invalid ELF header (/lib/x86_64-linux-gnu/libm.so is a ld script, not meant for dynamic loading), which seems to be just random incompetence with no actual consequence, and: unable to open /var/lib/hp/hplip.state: No such file or directory and, if I tried to populate this file based on examples found on the web: unable to load library /usr/share/hplip/scan/plugins/bb_escl.so: /usr/share/hplip/scan/plugins/bb_escl.so: cannot open shared object file: No such file or directory As it happens, it means the libsane-hpaio requires a binary non-Libre plugin for this printer. It can be downloaded with: sudo hp-plugin -g It installs files in /usr/share/hplip/scan/plugins/. After that: scanimage -h -d 'hpaio:/net/DeskJet_2700_series?ip=10.0.1.17' worked, as did actual scanning and Gimp's GUI. I am not very satisfied with the use of a binary plugin, but at least it works. Regards, -- Nicolas George
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