For the correct /dev/ entry, you can also create a udev rule:
cat /etc/udev/rules.d/99-usb-serial.rules :
SUBSYSTEM==“tty”, ATTRS{idVendor}==“10cf”, ATTRS{idProduct}==“0b1b”, SYMLINK+=“ttyVelbus”
This will create a /dev/ttyVelbus based on the vendor and producti ID.
This was needed when I used an older PI.
It didn’t created a symlink in /dev/servial
Stef