> For the complete documentation index, see [llms.txt](https://doc.sysdevmobile.com/kalipso5/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.sysdevmobile.com/kalipso5/developing/form/controls/events/gpi-state-changed.md).

# GPIO State Changed

This Event is triggered when the state of a general purpose input port is changed.

{% hint style="info" %}
This event is available for generic GPIO actions.
{% endhint %}

{% hint style="warning" %}
This event works for Zebra RFID actions on Windows only.
{% endhint %}

#### Event available on the following operating systems

![](/files/-MGNsZjeYMKt8-HvBB5n)