> 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

Kalipso - Form - Controls  - Events - 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

![](https://3821468174-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LrTlA1suFa5N48x_83N%2F-MGNrRhE4X1yoH0bXC6I%2F-MGNsZjeYMKt8-HvBB5n%2FTodos%20menos%20IOS.PNG?alt=media\&token=25a0b0e6-f318-4a38-b3f3-5b71460a3fb0)