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# Elements of the flow - MQTT trigger

Using the MQTT trigger, you can start a flow when an MQTT connection is addressed.

The connection itself is configured under Admin → Connections. You can find the documentation on MQTT connections [here](https://docs.groupalarm.com/en/article/connections-mqtt-1kcat4t/).

In the trigger, you simply need to then select the relevant connection and the defined topics.

![](https://storage.crisp.chat/users/helpdesk/website/-/9/1/f/e/91fefd8b4b0ac000/flowmqtten_uebxzp.png)