I have this system where I have 8 USB RFID readers which I would like to distinguish from one another. Here's a snippet from
Bus 002 Device 011: ID 05fe:1010 Chic Technology Corp. Optical Wireless Bus 002 Device 012: ID 05fe:1010 Chic Technology Corp. Optical Wireless
As you can see both the
idVendor and the
idProduct is the same for the two USB RFID readers.
Q1: Can anyone help me do a
--attrubute-walk with the
udev info so I can see if there's any parameter that is unique to the individual readers. (I'm using Ubuntu 14.04 LTS)
This is the sys path I think I'm supposed to look in, and what the folder contains:
nicolai@nicolai-K53SV:~$ ls /sys/bus/usb/devices/ 1-0:1.0 1-1:1.0 1-1.2:1.0 1-1.4 2-0:1.0 2-1:1.0 4-0:1.0 usb2 usb4 1-1 1-1.2 1-1.2:1.1 1-1.4:1.0 2-1 3-0:1.0 usb1 usb3
So of course I tried the following:
udevadm info --attribute-walk --path=/sys/bus/usb/devices/usb1 udevadm info --attribute-walk --path=/sys/bus/usb/devices/usb2 udevadm info --attribute-walk --path=/sys/bus/usb/devices/usb3 udevadm info --attribute-walk --path=/sys/bus/usb/devices/usb4
But I can't seem to find the two devices listed at the top (with ID 05fe:1010).
Q2: If there is a parameter that is unique to the individual reader, how can I (hopefully in python) distinguish between them?
Here's some python code which I thought I could use (until I realised that the ID's where the same for every RFID reader)
import usb dev = usb.core.find(idVendor=0x05fe,idProduct=0x1010) if dev is None: raise ValueError('Device not found') else: print('Device found')
A1: Here's the output from the
lsusb -v: http://paste.ubuntu.com/7818192/
As it can be seen the iSerial is just zero and all the other attributes are the same for both devices.
So for Q2: I was wondering if I could use the
setserial bash command to write a serial to the USB RFID reader. If so, is this serial stored even after the power is lost, or do you have to create a script that creates the serials every time you boot?
Any suggestion is helpful.