How Can I Comunicate With This Device Using Pyusb?

I have a Netware uniFlow device. When I plug it in it shows up in dmesg: [ 2962.369905] usb 2-1.4: new full-speed USB device number 11 using ehci-pci [ 2962.463867] usb 2-1.4: New

Solution 1:

In my experience, you have to have set up a rules file for the device for the udev system

1. Something along the lines of:

   ACTION=="add", SUBSYSTEMS=="usb", ATTRS{idVendor}=="171b", ATTRS{idProduct}=="2001", MODE="660", GROUP="plugdev"

   in a file called /lib/udev/rules.d/50-YourSoftwareName.rules (for example, dig around in man udev for file naming rules but 50-usbhax.rules should do)

2. Add your username to the plugdev group

   adduser username plugdev
   

3. Reload rules

   sudo udevadm control --reload (that is minus minus reload) sudo udevadm trigger

4. Unplug and replug the device or reboot your machine and see if it works.

NOTE: Some systems use the group input rather than plugdev, so edit the above accordingly. To check what your system uses have a look at the group name for the relevant entries in /dev/usb or /dev/input