Ubuntu USB udev permissions

[Resonanz]

In the documentation on docs.rs Kevin explains how to add permissions on Linux to enable access to the USB ports.

In my efforts to work thru this, I did the following (mostly the same as Kevin's instructions):

Move to .rules folder: cd /etc/udev/rules.d

Create new .rules file using (required) admin privileges sudo nano 70-plugdev-usb.rules

Add to file per Kevin's instructions: SUBSYSTEM=="usb", MODE="660", GROUP="plugdev"

I think I could have been more permission-limiting by also adding to the file: ATTRS{idProduct}=="XXXX", ATTRS{idVendor}=="YYYY",

To find XXXX and YYYY, use lsusb command to get the hex values of format XXXX : YYYY.

These are the same numbers required in the Rust code: .find(|d| d.vendor_id() == 0xXXXX && d.product_id() == 0xYYYY)

Reload udev rules: sudo udevadm trigger

Now my serial device fails due to "Stall" rather than lack of permissions. Yay !!!

Reference:
https://elinux.org/Accessing_Devices_without_Sudo