How to bind USB device under a static name?

Question

I have an arduino which sometimes gets bound to /dev/ttyUSB0 and other times to /dev/ttyUSB1 making my script fail.

I do not want to enumerate all the possibilities of where my device could be, but I rather have it be bound somewhere static, e.g. /dev/arduinio.

How do I achieve that?

Just write a simple udev-rule which will assign symlink /dev/arduino to right devise by its VID & PID.
Check arch-wiki: wiki.archlinux.org/index.php/Udev#Writing_udev_rules
After you've changed the rules, see How to reload udev rules without reboot?

Kotte · Accepted Answer · 2013-03-05 10:53:59Z

up vote 3 down vote accepted

As suggested, you can add some udev rules. I edited the /etc/udev/rules.d/10-local.rules to contain:

ACTION=="add", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6001", SYMLINK+="my_uart"

You can check for the variables of your device by running

udevadm info -a -p  $(udevadm info -q path -n /dev/ttyUSB0)

answered Mar 5 at 10:53

Kotte
62710

	Worked like a charm. One question: How to exit `udevam`? And it is important to note that `my_uart` creates the symlink under `/dev/my_uart`. I first wrote `/dev/arduino` the first time and it failed whilst `arduino` is sufficient. – k0pernikus Mar 7 at 19:11
	`udevadm` should exit by itself when it's done. – Kotte Mar 8 at 7:31
	Then for some unknown reason it froze the terminal session to my Raspberry Pi while generating the report. – k0pernikus Mar 8 at 12:19

1 Answer