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docs: add paragraph about serial device permissions

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Markus Küffner
2023-04-08 00:35:09 +02:00
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commit 7ca1fc22e5
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README.md
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@@ -140,6 +140,20 @@ docker compose --profile <profile> up -d
```
## Advanced Topics
### Serial device permissions
It may be necessary to change the permissions of your printers serial device.
This is usually the case when you're on a non debian based distro which uses a different numerical groupid for the `dialout` group.
Serial devices passed into the klipper container should be assigned to groupid `20` for the permissions to work within it.
This may be done by creating a udev rule on your host machine for your specific device, read up on how to do this on your specific OS.
Usually you'll have to create a `*.rules` file in `/etc/udev/rules.d` and add a single line like this to it.
Be sure to use your devices specific `idVendor` and `idProduct`, which can be found via `lsusb`.
```
ACTION=="add",SUBSYSTEM=="tty",ATTRS{idVendor}=="0000",ATTRS{idProduct}=="0000",GROUP="20"
```
### Input Shaper Calibration
Note:
>Running a host_mcu process on a RaspberryPi to access its GPIO pins is currently not possible when running in Docker.