[sane-devel] Issues with backend for Pixma TR4520

[Jack Sanders]

Update: thanks for your help, I got it working by installing the most
recent backends

On Tue, Jul 20, 2021 at 10:30 AM Jack Sanders <jjacksanders at gmail.com>
wrote:

> Thanks for the reply, Thierry.
>
> 1 - Distribution is Raspbian 10 (Debian-based, run on Raspberry Pi, ARM
> architecture)
> 2 - My sane backend is version 1.0.27
>
> On Mon, Jul 19, 2021 at 11:27 PM Thierry Huchard <thierry at ordissimo.com>
> wrote:
>
>> In order to help you more, we need to provide more information:
>> 1 - Your distribution and its version?
>> 2 - the version of sane installed
>> # scanimage --version
>>
>> Le 20 juillet 2021 07:40:16 GMT+02:00, Thierry Huchard <
>> thierry at ordissimo.com> a écrit :
>>>
>>> Hi,
>>> The pixma backend only supports usb.
>>> Your device is supported by the escl and airscan backend.
>>> You need to update your sane version or install airscan.
>>>
>>> Thierry
>>>
>>> Le 20 juillet 2021 05:18:55 GMT+02:00, Jack Sanders <
>>> jjacksanders at gmail.com> a écrit :
>>>>
>>>> I'm a major beginner with networks and all of this, and the way to get
>>>> this scanner to function is beyond me.
>>>>
>>>> This is the error readout after attempting to add the device directly
>>>> to the pixma backend config file. It's the only reaction I've gotten trying
>>>> to connect over wifi. Without listing the device in the config file, both
>>>> sane-find-scanner and scanimage -L run (both run as root) show nothing.
>>>> Error message below:
>>>>
>>>> [bjnp] udp_command: ERROR - no data received (timeout = 5000)
>>>> [bjnp] bjnp_init_device_structure: Cannot read mac address, skipping
>>>> this scanner
>>>> [bjnp] udp_command: ERROR - no data received (timeout = 5000)
>>>> [bjnp] add_scanner: ERROR - Cannot read scanner make & model: bjnp://
>>>> 192.168.68.110:8612/timeout=5000
>>>>
>>>> Meanwhile, when connected by usb I get this readout in response to
>>>> running sane-find-scanner, which lists codes that correspond to what's
>>>> listed on the backend supported device charts for this printer/scanner
>>>> model. Can't parse what the "Pipe error" bit means. Feedback message below:
>>>>
>>>> found USB scanner (vendor=0x04a9 [Canon], product=0x1854 [TR4500
>>>> series]) at libusb:001:005
>>>> could not fetch string descriptor: Pipe error
>>>>   # Your USB scanner was (probably) detected. It may or may not be
>>>> supported by
>>>>   # SANE. Try scanimage -L and read the backend's manpage.
>>>>
>>>> Any guidance on how to get it working would be greatly appreciated.
>>>>
>>>> Thank you!
>>>>
>>>
>> --
>> Envoyé de mon appareil Android avec Courriel K-9 Mail. Veuillez excuser
>> ma brièveté.
>>
>
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