> For the complete documentation index, see [llms.txt](https://docs.datacake.de/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.datacake.de/api/internal-mqtt/mqtt-over-websocket.md).

# MQTT over WebSocket

## Introduction

In some situations you may need to tunnel MQTT over WebSockets, the reasons for this are something like:

* Using MQTT in the browser
* Problems with the connection of a classic MQTT client

The Datacake MQTT Broker supports client connections via the WebSocket protocol. In this tutorial we will show you how to use this.

## Connection Details

* Server: `ws://mqtt.datacake.co`
* Port: `9001`

## Node-RED

If you encounter problems with the connection of an MQTT node in Node-RED, you can try to see if a WebSocket connection can solve the problem. In the following steps, we will show you how to prepare the MQTT node for connection via WebSockets.

### Broker Configuration

In the following screenshot you can see how the configuration of the MQTT node in Node-RED must look like. So change the according configuration as follows.

![](https://2221155863-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LNA8_b8wmabHgJ0QXoJ%2F-M_tdKmS21c8E7vbaEqf%2F-M_toBXt4z62lPXKgp_i%2FBildschirmfoto%202021-05-17%20um%2012.13.13.png?alt=media\&token=eadc1ac0-bb31-4ad6-9817-a9db6bca81a5)

{% hint style="info" %}
If you enter the `wss://` URL in the server address input field, the port input field is disabled. Therefore, specify the port number as a subsequent element in the server address, so:\
\
\&#xNAN;**`wss://mqtt.datacake.co:9001`**
{% endhint %}


---

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