HP Scanjet Enterprise Flow 5000 s3 Linux Drivers

This is a long shot. Give

  lsusb -v | grep -A 3 bInterfaceClass.*7

Ok, I did that and got:

Couldn't open device, some information will be missing

So I tried with sudo, which gave me no output. Here's the entry of the printer in sudo lsusb -v. :

Bus 001 Device 010: ID 03f0:5205 HP, Inc HP Scanjet 5000 s3
Device Descriptor:
  bLength 18
  bDescriptorType 1
  bcdUSB 2.00
  bDeviceClass 255 Vendor Specific Class
  bDeviceSubClass 255 Vendor Specific Subclass
  bDeviceProtocol 255 Vendor Specific Protocol
  bMaxPacketSize0 64
  idVendor 0x03f0 HP, Inc
  idProduct 0x5205
  bcdDevice 0.01
  iManufacturer 1 Hewlett-Packard
  iProduct 2 HP Scanjet 5000 s3
  iSerial 3 [serial number]
  bNumConfigurations 1
  Configuration Descriptor:
    bLength 9
    bDescriptorType 2
    wTotalLength 0x0027
    bNumInterfaces 1
    bConfigurationValue 1
    iConfiguration 4 FIT configuration
    bmAttributes 0xc0
      Self Powered
    MaxPower 100mA
    Interface Descriptor:
      bLength 9
      bDescriptorType 4
      bInterfaceNumber 0
      bAlternateSetting 0
      bNumEndpoints 3
      bInterfaceClass 255 Vendor Specific Class
      bInterfaceSubClass 255 Vendor Specific Subclass
      bInterfaceProtocol 255 Vendor Specific Protocol
      iInterface 5 FIT interface
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x81 EP 1 IN
        bmAttributes 2
          Transfer Type Bulk
          Synch Type None
          Usage Type Data
        wMaxPacketSize 0x0200 1x 512 bytes
        bInterval 0
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x02 EP 2 OUT
        bmAttributes 2
          Transfer Type Bulk
          Synch Type None
          Usage Type Data
        wMaxPacketSize 0x0200 1x 512 bytes
        bInterval 0
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x83 EP 3 IN
        bmAttributes 3
          Transfer Type Interrupt
          Synch Type None
          Usage Type Data
        wMaxPacketSize 0x0040 1x 64 bytes
        bInterval 1
Device Qualifier (for other device speed):
  bLength 10
  bDescriptorType 6
  bcdUSB 2.00
  bDeviceClass 0
  bDeviceSubClass 0
  bDeviceProtocol 0
  bMaxPacketSize0 64
  bNumConfigurations 1
Device Status: 0x0001
  Self Powered

Thanks for the info. I was looking for IPP-over-USB being supported,
but it is not. No more input from me. Sorry.

https://support.hp.com/us-en/drivers/selfservice/hp-scanjet-enterprise-flow-5000-s3-sheet-feed-scanner/8296257
The driver for your scanner is windows 2000 to windows 10 only. Linux does not have one.

I have C++ experience, could you point me toward some contributor documentation? I looked around the source code but I can't tell where scanning drivers are implemented, how the project is structured, and some utilities are missing. For example, in data/models/models.dat, it says not to edit manually and to use model_editor.py, but I can't find that python script anywhere.
I'm interested in trying my hand at implementing a driver.

Maybe this will work:
https://www.hamrick.com/vuescan/hp_scanjet_flow_5000_s3.html
or
HPLIP has a new driver with changes:
Added support for HP ScanJet Enterprise Flow 5000 s5
https://developers.hp.com/hp-linux-imaging-and-printing/gethplip?language=ja
It is not yet in the Ubuntu repository.