Cannot setup scanner with hplip

You have a wireless connection? That's good. Give the outputs of

  avahi-browse -rt _ipp._tcp
  avahi-browse -rt _uscan._tcp
  driverless

Many thanks for your reply. I attach a terminal printout of the outputs
requested and hope these will help.

Edward

Edward,

I communicate via the HPLIP web page, not using email. Your attachments
did not get here that I can see.. Perhaps use copy and paste.

OK. Sorry, the first email said I could reply to it. Here are the attachments.

edward@edward-HP-ProBook-450-G2:~$
edward@edward-HP-ProBook-450-G2:~$ avahi-browse -rt _ipp._tcp
+ wlo1 IPv6 HP DeskJet 2700 series [DD033A] Internet Printer local
+ wlo1 IPv4 HP DeskJet 2700 series [DD033A] Internet Printer local
= wlo1 IPv6 HP DeskJet 2700 series [DD033A] Internet Printer local
   hostname = [HP3024A9DD033A.local]
   address = [192.168.1.173]
   port = [631]
   txt = ["Scan=T" "Duplex=F" "Color=T" "UUID=83614b70-9b93-f991-e8ca-fe4ea24a4066" "Fax=F" "TLS=1.2" "note=" "adminurl=http://HP3024A9DD033A.local./#hId-pgAirPrint" "mac=30:24:a9:dd:03:3a" "priority=20" "usb_MDL=DeskJet 2700 series" "usb_MFG=HP" "product=(HP DeskJet 2700 series)" "ty=HP DeskJet 2700 series" "mopria-certified=2.0" "URF=CP1,MT1-2-8-9-10-11,PQ3-4-5,RS300,SRGB24,OB9,OFU0,W8-16,DEVW8-16,DEVRGB24-48,ADOBERGB24-48,FN3,IS1,V1.4" "kind=document,envelope,photo,postcard" "PaperMax=legal-A4" "rp=ipp/print" "pdl=application/vnd.hp-PCL,image/jpeg,application/PCLm,image/urf,image/pwg-raster" "qtotal=1" "txtvers=1"]
= wlo1 IPv4 HP DeskJet 2700 series [DD033A] Internet Printer local
   hostname = [HP3024A9DD033A.local]
   address = [192.168.1.173]
   port = [631]
   txt = ["Scan=T" "Duplex=F" "Color=T" "UUID=83614b70-9b93-f991-e8ca-fe4ea24a4066" "Fax=F" "TLS=1.2" "note=" "adminurl=http://HP3024A9DD033A.local./#hId-pgAirPrint" "mac=30:24:a9:dd:03:3a" "priority=20" "usb_MDL=DeskJet 2700 series" "usb_MFG=HP" "product=(HP DeskJet 2700 series)" "ty=HP DeskJet 2700 series" "mopria-certified=2.0" "URF=CP1,MT1-2-8-9-10-11,PQ3-4-5,RS300,SRGB24,OB9,OFU0,W8-16,DEVW8-16,DEVRGB24-48,ADOBERGB24-48,FN3,IS1,V1.4" "kind=document,envelope,photo,postcard" "PaperMax=legal-A4" "rp=ipp/print" "pdl=application/vnd.hp-PCL,image/jpeg,application/PCLm,image/urf,image/pwg-raster" "qtotal=1" "txtvers=1"]
edward@edward-HP-ProBook-450-G2:~$

edward@edward-HP-ProBook-450-G2:~$ avahi-browse -rt _uscan._tcp
+ wlo1 IPv6 HP DeskJet 2700 series [DD033A] _uscan._tcp local
+ wlo1 IPv4 HP DeskJet 2700 series [DD033A] _uscan._tcp local
= wlo1 IPv4 HP DeskJet 2700 series [DD033A] _uscan._tcp local
   hostname = [HP3024A9DD033A.local]
   address = [192.168.1.173]
   port = [8080]
   txt = ["duplex=F" "is=platen" "cs=binary,color,grayscale" "rs=eSCL" "representation=images/printer.png" "UUID=83614b70-9b93-f991-e8ca-fe4ea24a4066" "note=" "adminurl=http://HP3024A9DD033A.local." "ty=HP DeskJet 2700 series" "pdl=application/octet-stream,application/pdf,image/jpeg" "mopria-certified-scan=1.2" "vers=2.63" "txtvers=1"]
= wlo1 IPv6 HP DeskJet 2700 series [DD033A] _uscan._tcp local
   hostname = [HP3024A9DD033A.local]
   address = [192.168.1.173]
   port = [8080]
   txt = ["duplex=F" "is=platen" "cs=binary,color,grayscale" "rs=eSCL" "representation=images/printer.png" "UUID=83614b70-9b93-f991-e8ca-fe4ea24a4066" "note=" "adminurl=http://HP3024A9DD033A.local." "ty=HP DeskJet 2700 series" "pdl=application/octet-stream,application/pdf,image/jpeg" "mopria-certified-scan=1.2" "vers=2.63" "txtvers=1"]
edward@edward-HP-ProBook-450-G2:~$

edward@edward-HP-ProBook-450-G2:~$ driverless
ipp://HP3024A9DD033A.local:631/ipp/print
edward@edward-HP-ProBook-450-G2:~$

> Here are the attachments.

Thanks. Very useful.

This is a non-HPLIP solution but it is (or should be) a reliable one. Your
device is supported by sane-airscan, which is provided in Mint 20.1. See

  https://github.com/alexpevzner/sane-airscan

Download it from

  https://download.opensuse.org/repositories/home:/pzz/xUbuntu_19.04/amd64/

Thanks for your reply. I downloaded sane-airscan but I cannot install as it requires libc6 2.29 or higher. My repositories insist that 2.27 which I have is the latest version. I'm not sure how to install later versions.

That sounds like a bug in that package. Any luck with what is at

  https://download.opensuse.org/repositories/home:/pzz/xUbuntu_16.04/amd64/ ?

No luck installing sane-airscan. gdebi keeps asking for missing dependencies which I cannot find. I think this must be the time to upgrade to Mint 20 and hope it will work from there.

The first link I gave is incorrect. It should be

https://download.opensuse.org/repositories/home:/pzz/xUbuntu_18.04/amd64/

If you do upgrade to Mint 20.1, sane-airscan can be installed with

  apt install sane-airscan

Thank you for the new link. Sane-airscan installed without problem, but Xsane will still not connect. I was able to access Hp-doctor.
This reported that everything was fine except that it gave several warnings that it could not read etc/cups/ppd/Deskjet-2700-series.ppd. Also gave warning of 'insufficient permission to access ppd file'. I don't know what this means.

Please give

  scanimage -L

and

  airscan-discover

Here are the results:

edward@edward-HP-ProBook-450-G2:~$ scanimage -L
device `hpaio:/net/DeskJet_2700_series?hostname=HP3024A9DD033A.local' is a Hewlett-Packard DeskJet_2700_series all-in-one
device `hpaio:/net/deskjet_2700_series?ip=192.168.1.173&queue=false' is a Hewlett-Packard deskjet_2700_series all-in-one
device `brother4:net1;dev0' is a Brother Brother MFC-J5320DW
device `airscan:e0:HP DeskJet 2700 series [DD033A]' is a eSCL HP DeskJet 2700 series [DD033A] ip=192.168.1.173

edward@edward-HP-ProBook-450-G2:~$ airscan-discover
[devices]
  HP DeskJet 2700 series [DD033A] = http://192.168.1.173:8080/eSCL/, eSCL
  HP DeskJet 2700 series [DD033A] = https://192.168.1.173:443/eSCL/, eSCL
  HP DeskJet 2700 series [DD033A] = http://192.168.1.173:53048, WSD
  HP DeskJet 2700 series [DD033A] = http://[FE80::3224:A9FF:FEDD:33A%253]:53048, WSD

Can you scan with any of

  xsane "airscan:e0:HP DeskJet 2700 series [DD033A]"
  simple-scan "airscan:e0:HP DeskJet 2700 series [DD033A]"
  scanimage -d "airscan:e0:HP DeskJet 2700 series [DD033A]" > image.pnm ?

I tried these options. Xsane and Simple scan still gave the same error message. They recognise the device but cannot connect. The third option did not run. It seemed to dislike the ? at the end.

Tried usermod---. Below is the result:

edward@edward-HP-ProBook-450-G2:~$ usermod -a -G lp edward
usermod: Permission denied.
usermod: cannot lock /etc/passwd; try again later.

Strangely, following this attempt, I tried Xsane and it worked perfectly. To test it, I restarted the laptop and tried again and the errors came back, as set out below.

HP Device propietary plug-in is missing. Click Next to continue plug-in installation. In case of plug-in download failure, run hp-plugin command from the terminal manually.

Error message: Failed to open device hpaio:/net/Deskjet-2700-series?hostname=HP3024A9DD033A.local:Error during device I/O.

HP Linux Imaging and Printing System (ver. 3.21.2)
Plugin Download and Install Utility ver. 2.1

Copyright (c) 2001-18 HP Development Company, LP
This software comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to distribute it
under certain conditions. See COPYING file for more details.

HP Linux Imaging and Printing System (ver. 3.21.2)
Plugin Download and Install Utility ver. 2.1

Copyright (c) 2001-18 HP Development Company, LP
This software comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to distribute it
under certain conditions. See COPYING file for more details.

Checking for network connection...
Downloading plug-in from:
Receiving digital keys: /usr/bin/gpg --homedir /home/edward/.hplip/.gnupg --no-permission-warning --keyserver pgp.mit.edu --recv-keys 0x4ABA2F66DBD5A95894910E0673D770CDA59047B9

(Final GUI Message: unable to receive key.)

I think I have the answer. Xsane is now giving me three choices with HP device. One is with airscan and this is the one that is working. I think I can assume that it will work with that now. Fingers crossed.
Thankyou for all your help

Thanks Manfred Hampl, that solved my question.

For completeness' sake:

1. Sorry, my fault, should have been
sudo usermod -a -G lp edward

2. There is the possibility to manually download and install the HP plugins

wget https://developers.hp.com/sites/default/files/hplip-3.21.2-plugin.run
sh ./hplip-3.21.2-plugin.run

> It seemed to dislike the ? at the end.

I asked a question. That is why "?" is there. It is not part of the command.