For the making symlinks for usb ports I tried the method described in the following post:
[How to make symlinks for usb ports in linux (EXTRA_JAVA_OPTS)]
But that didn’t work. At the end the result of ls /dev/tty* turned out to the old and existing /dev/ttyAMA0 and /dev/ttyS0
And I tried it also with this:
sudo nano /etc/udev/rules.d/99-usb-serial.rules
SUBSYSTEM==“tty”, ATTRS{idVendor}==“0403”, ATTRS{idProduct}==“6015”, ATTRS{serial}==“DO2ZW4FJ”, SYMLINK+=“ttyUSB_RFXcom”
SUBSYSTEM==“tty”, ATTRS{idVendor}==“0658”, ATTRS{idProduct}==“0200”, SYMLINK+=“ttyUSB_ZWaveStick”
After saving I used sudo udevadm trigger to get the rules to work.
That didn’t work either. I become a little pessimistic in finding a solution.