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Linux Static USB port configuration for Homeseer 3

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  • Linux Static USB port configuration for Homeseer 3

    Suggested fix is:

    Write a simple udev-rule which will assign symlink /dev/whatever to right device by its VID & PID.

    1 - Find out what is on ttyUSB

    dmesg | grep ttyUSB

    2 - list all attributes of the device and pick out a unique identifier set, eg idVendor + idProduct (and if necessary SerialNumber if you have more than one device with the same idVendor and idProduct).

    udevadm info --name=/dev/ttyUSB1 --attribute-walk

    3 - Create a file /etc/udev/rules.d/99-usb-serial.rules with something like this line in it:

    SUBSYSTEM=="tty", ATTRS{idVendor}=="1234", ATTRS{idProduct}=="5678", SYMLINK+="your_device_name"

    4 - Load the new rule:

    sudo udevadm trigger

    5 - Verify what happened:

    ls -l /dev/your_device_name

    will show what ttyUSB number the symlink went to. If it's /dev/ttyUSB1, then verify who owns that and to which group it belongs:

    ls -l /dev/ttyUSB1

    Then just for the fun of it:

    udevadm test -a -p $(udevadm info -q path -n /dev/your_device_name)
    Last edited by Pete; May 22nd, 2016, 03:48 PM.
    - Pete

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