# 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 %}


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