Writing a UDev rule

Writing a simple UDev rule for identifying a device with a specific name

About UDev:

udev - Debian Wikiwiki.debian.org

To check your device connection, run:

dmesg | grep ttyUSB  #or ttyACM as per your device type

Getting the attributes of the connected device:

udevadm info --name=/dev/ttyUSBx --attribute-walk  # eg. /dev/ttyACM1

Writing the udev:

The following folder is reserved for non-system defined or custom udev rules

/etc/udev/rules.d

Create the following file:

sudo vim /etc/udev/rules.d/my_udev.rules

Add a similar line as per the set of unique identification attributes like serial no. or kernel no. available from Step-2 above:

SUBSYSTEM=="tty", ATTRS{idVendor}=="1234", ATTRS{idProduct}=="5678", SYMLINK+="your_device_name" 

restart the system:

sudo service udev reload

Also reboot your system.

Verify:

Check if the rule really worked:

ls -l /dev/your_device_name  

For more info visit:

Writing udev ruleswww.reactivated.net