> 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/actions/actions-description/group-others/gpio-open.md).

# GPIO Open

Open a specific Pin to read/write.

Action available for the following operating systems:

![](/files/-MS8vXpqPtrnbV3zCQH-)

### Parameters

* **Pin** *\<string, variable or control> -* The Pin to open.

{% hint style="info" %}
You need to call this action before any other GPIO elated action to work with a GPIO.
{% endhint %}

{% hint style="info" %}
Kalipso can interact with GPIO pins for Android and Windows 10.\
Using GPIO actions you can read the binary state or control the on/off output state.\
To open a connection with a GPIO port you need to know the unique name of the port.\
Call **GPIO Get List** action to get the list of available ports.
{% endhint %}

{% hint style="info" %}
When a PIN state changes the **GPIO State Changed** event is triggered.\
Use action **GPIO Config Input Event** to configure how this event works and where to store the PIN and state values.
{% endhint %}