USB change port sometimes and zigbee2mqtt can't find the usb-stick

[stiech82]

Hi,

i have the problem, that my raspberry changed sometimes te usb-port. from /dev/ttyUSB0
to /dev/ttyUSB1 and back.
I don't know when it happens exactly. After a few weeks.

But zigbee2mqtt didn't found it until i changed the port in the zigbee2mqtt config.

Is it possible to give the USB-Stick a fix port or to use in zigbee2mqtt config both ports to keep running zigbee if the stick changes the port?

Thanks so much.

[StephanStS]

Maybe you could work with udev rules?

If you get via lsusb the idVendor and idProduct you could edit udev rule file, e.g. /etc/udev/rules.d/99-usb-zigbee.rules

Depending on the USB device, these values could be the entry:

• SUBSYSTEM=="tty", ATTRS{idVendor}=="10c4", ATTRS{idProduct}=="ea60", SYMLINK+="zigbee"
• SUBSYSTEM=="tty", ATTRS{idVendor}=="0451", ATTRS{idProduct}=="16a8", SYMLINK+="ZigBee_CC2531"

Then (after a reboot) you would find the USB stick not only via /dev/ttyUSBx, you also find it via /dev/zigbee resp. /dev/ZigBee_CC2531 (depending your udev entries).
You can also find your stick via ls -l /dev/serial/by-id.