I have a USB barcode scanner and am running a python script that collects data from /dev/hidraw0 and inputs the data into a database. The issue is that every time the scanner collects a code it additionally send it to the terminal and actually tries to log on to the system via the tty.
Is there a way to disable the HID from accessing the terminal and trying to log on, but still allowing the python script to collect the data?
Thank you in advance for any help that you can provide.
Open /dev/input/path-to-your-scanner with the grab option. Use the path with symlinks that are constant across boots, not /dev/input/eventX.
See e.g. here for a Python evdev library that makes it easy to do from Python.
You cannot grab on the hidraw level, and unless you need the HID reports themselves for some reason, this is not necessary.
If you do need the hidraw level, then it will get tricky - you'll have to disengage the hidraw level from feeding into the input level. Or maybe open both the input device and the hidraw device, I've never tried that.
Here is a python script I wrote for a USB barcode scanner using the evdev library with grabbing functionality as suggested by @dirkt:
https://gist.github.com/michalfapso/1755e8a35bb83720c2559ce8ffde5f85
