My problem is this: I will have 2-4 identical scanners attached to the same computer. Due to the needs of the application, the power to the scanners will be cut and turned on automatically by the computer when they are to scan. All scanners will be doing this, turn on - scan - turn off, in parallel several times per hour. I can not know if they will be on at the same time nor if the order will stay the same.
So what I'd like to do, since they will be plugged into specific USB-ports, is to identify them by their physical port. But how to do this so a normal user has rights to communicate with the scanner in a safe manner? I haven't seen any information when investigating the scanner(s) as to their physical port/position. It might be that I haven't succeeded fully to agree with udev. At present only one scanner is attached and that works wonderfully but I call it without specifying device. Scanner-brand: Epson V700
