[sane-devel] Scanner with IP on a different network

[Ralph Little]

Hi,


On 2022-04-25 03:25, AG via sane-devel wrote:
>
>
> On 4/25/22 12:21, AG via sane-devel wrote:
>>
>>
>> On 4/25/22 11:25, Thierry Huchard wrote:
>>> Le 2022-04-25 10:43, AG via sane-devel a écrit :
>>>> I am using Linux Mint, Simple Scan and Canon MF210 scanner-printer 
>>>> combo.
>>>>
>>>> The MF210 is on a different subnetwork and cannot be found by SANE /
>>>> Simple Scan.
>>>>
>>>> With the printer driver I can specify the IP address in the properties
>>>> configuration window and it will find it and it works but SANE will
>>>> only search the subnetwork by itself and not allow me to specify an IP
>>>> address.
>>>>
>>>> Is there a way that I could get SANE to work with an IP address
>>>> outside of my network?
>>>
>>> Hi,
>>>
>>> Which driver are you using?
>>> scanimage -L
>>>
>>> Thierry
>>
>> I apologize for my ignorance but I thought SANE /was/ the driver or 
>> SANE used some system driver.
>> The scanner does work when connected to the same subnetwork as it is 
>> detected correctly but it cannot be found when connected to a 
>> different subnetwork.
>> If I ever installed a driver for the scanner I do not remember doing 
>> so but I would have downloaded it from the official Canon web site.
>> I have searched the system hw using hardinfo and other commands like 
>> lshw but cannot find any mention of a driver that I can identify as 
>> relating to the scanner.
>> What can I do to find out?
>
> OK, just realized:
>
> scanimage -L
> device `pixma:MF210_d8492f583058' is a CANON Canon i-SENSYS MF210 
> Series multi-function peripheral

You can put the IP address at the bottom of the file 
/etc/sane.d/pixma.conf e.g.

mfnp://192.168.1.3

...substituting your device's IP address.

SANE is really a framework/API and a set of backend drivers for an array 
of devices.
Thierry's question was because Canon devices use a number of different 
protocols (and therefore backend/drivers) depending on their age.
In your case, it is using the pixma backend with the mfnp protocol.
Newer devices require the escl backend.

According to our supported scanners page here:

http://www.sane-project.org/sane-mfgs.html

... the pixma backend is used to support the MF210 for USB, Wifi and 
wired Ethernet.

Cheers,
Ralph
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