> For the complete documentation index, see [llms.txt](https://docs.incari.com/incari-studio/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.incari.com/incari-studio/2022.2/toolbox/communication/mavlink/mavlink-start.md).

# MAVLink Start

## Overview

![The MAVLink Start Node.](/files/epJ32DtChhwqFygp6qXQ)

The **MAVLink Start Node** opens communication with a **MAVLink** serial port that has already been set up in [**Project Settings**](/incari-studio/2022.2/modules/project-settings/mavlink.md) and starts the *heartbeat*, which is done automatically with no action required by the user.

It is important to note that while the **MAVLink Start Node** starts a **MAVLink** connection, it may not completely finish establishing said connection when the **Node** is executed. This could lead to the **Logic** attached to its **Output Pulse** to not work even though there is technically nothing wrong. In order to avoid this, it is highly suggested to use the [**On MAVLink Start Node**](/incari-studio/2022.2/toolbox/communication/mavlink/events/on-mavlink-start.md) instead. This way, the **Logic** will only execute once the **MAVLink** connection has definitely been established.

Again, the user must first use the **MAVLink Start Node** to open the connection. Separately, the **On MAVLink Start Node** can be used to execute the desired **Communication Logic**.

![MAVLink Start and On MAVLink Start Configuration.](/files/l3plJICg33mq2cxtgVN0)

[**Scope**](https://github.com/cgi-studio-gmbh/incari-doc/blob/2022.2/toolbox/communication/overview.md#scopes): **Project**, **Scene**.

## Attributes

![The MAVLink Start Node Attributes.](/files/XoomWyfKNaylY2ws1JKH)

| Attribute       | Type          | Description                                                                                                                                                                           |
| --------------- | ------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `Configuration` | **Drop-Down** | The desired *MAVLink* serial port, which refers back to the selections made under *MAVLink* in the [**Project Settings**](/incari-studio/2022.2/modules/project-settings/mavlink.md). |

## Inputs

| Input             | Type      | Description                                                           |
| ----------------- | --------- | --------------------------------------------------------------------- |
| *Pulse Input* (►) | **Pulse** | A standard **Input Pulse**, to trigger the execution of the **Node**. |

## Outputs

| Output             | Type      | Description                                                                                                                            |
| ------------------ | --------- | -------------------------------------------------------------------------------------------------------------------------------------- |
| *Pulse Output* (►) | **Pulse** | A standard **Output Pulse**, to move onto the next **Node** along the **Logic Branch**, once this **Node** has finished its execution. |

## See Also

* [**MAVLink Stop**](/incari-studio/2022.2/toolbox/communication/mavlink/mavlink-stop.md)
* [**On MAVLink Start**](/incari-studio/2022.2/toolbox/communication/mavlink/events/on-mavlink-start.md)

## External Links

* What is a [*heartbeat*?](https://mavlink.io/kr/services/heartbeat.html)