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symlinks

Jens Erat edited this page Jul 27, 2015 · 12 revisions

Use symlinks if you use more than one USB port. If you have more than one USB device (e.g. a Zwave dongle and an RFXCOM dongle, the USB name will change every time you reboot. To prevent this, create or add to existing file (/etc/udev/rules.d/50-usb-serial.rules) a rule like the following:

SUBSYSTEM=="tty", ATTRS{idVendor}=="0403", ATTRS{product}=="RFXrec433", SYMLINK+="USBrfx", GROUP="dialout", MODE="0666" SUBSYSTEM=="tty", ATTRS{idVendor}=="10c4", ATTRS{idProduct}=="ea60", SYMLINK+="USBzwave", GROUP="dialout", MODE="0666"

To get IdVendor, product, and IdProduct, you need to run (for USB0, USB1, ACM0 etc) sudo udevadm info --attribute-walk --path=/sys/bus/usb-serial/devices/ttyUSB0. There you can find IdVendor, product, and IdProduct. Replace these IDs in the rule and save the file. Now your stick can be referenced in OpenHab configuration as /dev/USBzwave. You will also need to add the property to the Java command line by adding the following (device names delimited by : ) to the file /etc/init.d/openhab in the JAVA_ARGS section with your device names substituted:

-Dgnu.io.rxtx.SerialPorts=/dev/USBrfxcom:/dev/USBzwave

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