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docs: Various minor fixes (#5175)

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Signed-off-by: Yifei Ding<yifeiding@protonmail.com
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Yifei Ding 2022-01-26 15:00:18 -08:00 • committed by GitHub
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docs/RPi_microcontroller.md
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@ -63,10 +63,10 @@ following the instructions in
## Optional: Identify the correct gpiochip
On Rasperry and on many clones the pins exposed on the GPIO belong to the first gpiochip. They can therefore be used on klipper simply by referring them with the name `gpio0..n`.
On Rasperry Pi and on many clones the pins exposed on the GPIO belong to the first gpiochip. They can therefore be used on klipper simply by referring them with the name `gpio0..n`.
However, there are cases in which the exposed pins belong to gpiochips other than the first. For example in the case of some OrangePi models or if a Port Expander is used. In these cases it is useful to use the commands to access the _Linux GPIO character device_ to verify the configuration.
To install the _Linux GPIO character device - binary_ on a debian based distro like octopi run:
To install the _Linux GPIO character device - binary_ on a debian based distro like OctoPi run:
```
sudo apt-get install gpiod
```