MQTT Sink Connector for Confluent Platform

This connector connects to a MQTT broker and publishes data to the specified topics. SSL is supported. For information on how to create SSL keys and certificates see Security Tutorial. For the relevant configuration properties, see the MQTT sink connector configuration reference.

Configuration Properties

For a complete list of configuration properties for this connector, see MQTT Sink Connector Configuration Properties.


For an example of how to get Kafka Connect connected to Confluent Cloud, see Distributed Cluster in Connect Kafka Connect to Confluent Cloud.

Usage Notes

If you want to change the topic take a look at the RegexRouter transformation which can be used to change the topic name it is sent to the MQTT Server.

This connector publishes using the Apache Kafka® topic name. If you need to publish to a different topic name use a transformation to change the topic name.


Property-based example

This configuration is used typically along with standalone workers.

 topics=< Required Configuration >
 mqtt.server.uri=< Required Configuration >

REST-based example

This configuration is used typically along with distributed workers. Write the following json to connector.json, configure all of the required values, and use the command below to post the configuration to one the distributed connect worker(s). Check here for more information about the Kafka Connect REST API

Connect Distributed REST example:

   "config" : {
     "name" : "MqttSinkConnector1",
     "connector.class" : "io.confluent.connect.mqtt.MqttSinkConnector",
     "tasks.max" : "1",
     "topics" : "< Required Configuration >",
     "mqtt.server.uri" : "< Required Configuration >"

Use curl to post the configuration to one of the Kafka Connect Workers. Change http://localhost:8083/ the endpoint of one of your Kafka Connect worker(s).

Create a new connector:

curl -s -X POST -H 'Content-Type: application/json' --data @connector.json http://localhost:8083/connectors

Update an existing connector:

curl -s -X PUT -H 'Content-Type: application/json' --data @connector.json http://localhost:8083/connectors/MqttSinkConnector1/config