Search code examples
linuxusbdevice-driverpersistentudev

Persistant name in usb device which open several connections || connect USB to specific port

I am trying to add a persistent name to a USB device connection to be able to connect to it by writing /dev/multitech instead of /devttyACMx. I have been able to do so with other devices by adding an udev rule, for example:

SUBSYSTEM=="tty", ATTRS{idVendor}=="1bc7", ATTRS{idProduct}=="0021",ATTRS{serial}=="356136967675473", SYMLINK+="multitech"

The problem is that this device open 6 connections, from ttyACM0 to ttyACM5 (if nothing else connected) but to use it you have to use the ttyACM0 (meaning the first connection) but if you write:

$ ls -l /dev/multitech

you may get whatever connection it has open, maybe ttyACM0 or maybe ttyACM3... the thing is that this is useless for me, since it sometimes works and sometimes it does not. Is there anything I can do about this?

Thanks a lot!!

Solution

  • Change default names for USB virtual serial ports in Linux

    This post was the solution to my troubles, instead of using the /devttyACMx y changed to used the names in /dev/serial/by-id/ up until now it has worked fine, if it stops doing it I will post it