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Add Z-Wave troubleshooting for udev device file naming (#12725)

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Tyler Szabo 2020-04-06 09:33:13 -07:00 committed by GitHub
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@ -287,3 +287,7 @@ WARNING: Checksum incorrect - sending NAK
```
If you see any of these messages repeated in the log then _probably_ you've got something else running that's also using the Z-Wave controller. That might mean you've also got the OpenZ-Wave control panel (ozwcp) running, a second instance of Home Assistant or something else. You need to stop that other process to resolve this.
### Changing device paths
Configurations using `udev` can experience race conditions in creating device paths such that they change on reboot. This can cause a device to appear to change between `/dev/ttyACM0` and `/dev/ttyACM1` after reboot. In this case using the symlinks created for device IDs can ensure the correct device is used, for example: `/dev/serial/by-id/usb-0658_0200-if00` for Aeotec Z-Stick.