[Pcsclite-muscle] Multiple identical USB card readers

[Ludovic Rousseau]

Le mer. 4 juin 2025 à 12:41, UAB Molėtų radijas ir televizija
<it at mrtv.lt> a écrit :
> Hello,

Hello,

> after installing multiple identical pcsc USB card readers on an Ubuntu
> 24.04 server, the following problem occurs: when the server is rebooted,
> the numbering of the USB card readers often changes. Is there any way to
> prevent the readers from swapping?

If you are lucky your smart card readers provide a serial number and
you can identify them with it.
See "What is in a PC/SC reader name?"
https://blog.apdu.fr/posts/2010/05/what-is-in-pcsc-reader-name/

You can also use SCARD_ATTR_CHANNEL_ID to get the USB bus and address
of your readers.
See "SCARD_ATTR_CHANNEL_ID and USB devices"
https://blog.apdu.fr/posts/2020/04/scardattrchannelid-and-usb-devices/

Bye

-- 
 Dr. Ludovic Rousseau