Update external-notification.mdx

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Thomas Göttgens 2022-10-22 12:50:49 +02:00 committed by GitHub
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@ -31,6 +31,10 @@ Specifies whether the external circuit is triggered when the device's GPIO is lo
Specifies the GPIO that your external circuit is attached to on the device.
:::info
on ESP32 based boards, GPIOs 34 to 39 are GPIs input only pins. These pins dont have internal pull-up or pull-down resistors. They cant be used as outputs, so you can NOT use these pins as outputs.
:::
### How long monitored GPIO is triggered
Specifies how long in milliseconds you would like your external circuit to be triggered.