# GPIO Open

Open a specific Pin to read/write.

Action available for the following operating systems:

![](https://3821468174-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LrTlA1suFa5N48x_83N%2F-MS8rXfPEVYgYK-MjD4C%2F-MS8vXpqPtrnbV3zCQH-%2FAndroi_Win10%20e%20Win32.PNG?alt=media\&token=b7a779b4-2092-4368-b634-4d069a3e13c4)

### 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 %}