# MQTT Subscribe

## Overview

![The MQTT Subscribe Node.](https://1582035224-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MIspkFTPkuGkv4UgQGs-3848250649%2Fuploads%2Fgit-blob-7530729f0bdcfe901b1f34d282c11338daa6671d%2Fmqttsubscribe.png?alt=media)

The **MQTT Subscribe** listens for the `Topic`, or key of the **MQTT** key/value pair.

## Attributes

| Attribute       | Type           | Description                                                       |
| --------------- | -------------- | ----------------------------------------------------------------- |
| `Configuration` | **Drop-down**  | The connection, or signal name, that will be used.                |
| `Topic`         | **User Input** | The key in the **MQTT** key/value pair, in the form *Topic/name*. |

## 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

* [**MQTT Start**](https://docs.incari.com/incari-studio/2021.3/toolbox/communication/mqtt/mqttstart)
* [**MQTT Stop**](https://docs.incari.com/incari-studio/2021.3/toolbox/communication/mqtt/mqttstop)
* [**MQTT Publish**](https://docs.incari.com/incari-studio/2021.3/toolbox/communication/mqtt/mqttpublish)

## External Links

* [*An in-depth explanation of Topics*](http://www.steves-internet-guide.com/understanding-mqtt-topics/)