- create the rule:
$ sudo nano /etc/udev/rules.d/99-persistent-usb-serial.rules
# write/append following line:
ATTRS{idVendor}=="0457", ATTRS{idProduct}=="0819", ATTRS{busnum}=="1", ATTRS{devnum}=="2", SYMLINK+="touchscreen1", MODE="0666", OWNER=":YOUR_USER"
- get the variabled as follow: