M277DW Not Scanning (macOS Sierra 10.12.4)

[michelb1]

I followed the procedure as indicated, installing HewletPackardPrinterDrivers5.1.dmg. When pressing the + button in System Preferences, I obtained access to HP ColorJet MFP M277dw (fax). To access the printer, I had to enter its IP address. But scanning still does not work whether with HP Easy Scan or Image Capture. The error message is "No camera or scanner connected" in Image Capture while in HP Easy Scan, no scanner is selected and the browse scanner does not show anything. I cannot therefore scan any documents from my Mac OSX High Sierra nor could I do it when I bought the Mac with OSX Sierra preinstalled.

If anyone can help find a solution, I will be grateful

[HangingByTheBay]

Did some debugging as posted on this other thread about M277 Scanning problems: https://h30434.www3.hp.com/t5/Scanning-Faxing-and-Copying/HP-MFP-M277DW-an-error-occurred-while-comm...

I enabled eSCL aka AirScan as directed here: https://support.hp.com/us-en/document/c04945509

And discovered I could scan using the eSCL interface directly.

You can submit an XML file

<?xml version="1.0" encoding="UTF-8"?>
<scan:ScanSettings xmlns:pwg="http://www.pwg.org/schemas/2010/12/sm" xmlns:scan="http://schemas.hp.com/imaging/escl/2011/05/03">
  <pwg:Version>2.0</pwg:Version>
  <pwg:ScanRegions>
    <pwg:ScanRegion>
      <pwg:Height>3300</pwg:Height>
      <pwg:ContentRegionUnits>escl:ThreeHundredthsOfInches</pwg:ContentRegionUnits>
      <pwg:Width>2550</pwg:Width>
      <pwg:XOffset>0</pwg:XOffset>
      <pwg:YOffset>0</pwg:YOffset>
    </pwg:ScanRegion>
  </pwg:ScanRegions>
  <pwg:InputSource>Feeder</pwg:InputSource>
  <!-- <scan:AdfOption>DetectPaperLoaded</scan:AdfOption> -->
  <scan:ColorMode>Grayscale8</scan:ColorMode>
</scan:ScanSettings>

Using http POST To the printer's eSCL intereface at /eSCL/ScanJobs

using a command such as

curl -v -d @adf_settings.xml http://$PRINTER_IP/eSCL/ScanJobs

where PRINTER_IP is the IP address of your printer

If successfull the printer should return

HTTP/1.1 201 Created
Cache-Control: no-cache, no-store, must-revalidate
Location: http://$PRINTER_IP/eSCL/ScanJobs/$JOB_ID
Server: gSOAP/2.7
Content-Length: 0
Connection: keep-alive

Where JOB_ID is a job ID number

You can then retrieve succesive pages of your scanned document from the URL

http://$PRINTER_IP/eSCL/ScanJobs/$JOB_ID/NextDocument

You can even point a web browser to this URL, just wait for each image to load and then reload the web page to get the next scanned page of the document.

Oddly, performing a few successfull scans this way seems to allow HP Easy Scan to operate correctly. Maybe the HP driver bug involves the driver referencing uninitialized/unallocated variables which are initialized by this eSCL access???

More importantly, if you can scan via this manual method that should rule out the possibility of hardware problems and/or problems with your local network configuration.  It does seem that there is a bug in either the HP printer firmware and/or the OS X scanner drivers.

[markosjal]

@HangingByTheBay

My question to you sir is where is The OS getting the scan URL from?

http://$PRINTER_IP/eSCL/ScanJobs

Is this consstent acrioss all devices? I have not seen it in a Bonjouir advertisement . Also the line

<pwg:ContentRegionUnits>escl:ThreeHundredthsOfInches</pwg:ContentRegionUnits>

This seems to refer to 300DPI?? Is that so??

It seems a very convoluted form of expressing it. Also would seem very complicated changing to centimeters.