Udev

Giving a static device name

• Get the automatically assigned device name

sudo dmesg | grep tty
[21151.646593] cdc_acm 1-2:1.2: ttyACM0: USB ACM device

• Get vendor and product id

udevadm info --name=/dev/ttyACM0 --attribute-walk | grep idProduct
   ATTRS{idProduct}=="374b"
   ATTRS{idProduct}=="0002"
udevadm info --name=/dev/ttyACM0 --attribute-walk | grep idVendor
   ATTRS{idVendor}=="0483"
   ATTRS{idVendor}=="1d6b"

• Create a new rule

sudo nano /etc/udev/rules.d/50-usb-serial.rules

• Insert

SUBSYSTEM=="tty", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="374b", SYMLINK+="specificName"

• Activate the rule

sudo udevadm trigger 

• Now the device should be available with the new name

ls -l /dev/specificName 
lrwxrwxrwx 1 root root 7 Apr 26 07:33 /dev/specificName -> ttyACM0