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			Update gpio.md
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				|  | @ -166,3 +166,6 @@ SUBSYSTEM=="usb", ATTR{idVendor}=="16c0", ATTR{idProduct}=="05df", MODE="666" | |||
| ``` | ||||
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| Channels should not use duplicate physical numbers. The driver supports saving state between KVMD restarts (meaning `initial=null`). | ||||
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 | ||||
| ### ezCoo KVM switch | ||||
| You can use GPIO to control switch port switching. This usually requires the use of relays and buttons, but for the [ezCoo switch](https://github.com/pikvm/pikvm/blob/master/pages/ezcoo.md), there is a special driver that simulates GPIO by sending commands to the switch over the serial port. So you can make a menu in Pi-KVM to control the multiport switch. | ||||
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