MQTT Protocol Communication
Industrial Communication Toolbox™ allows you to subscribe to and read messages from MQTT topics via third-party MQTT brokers, and to write messages to MQTT topics.
Message Queuing Telemetry Transport (MQTT) is an OASIS standard messaging protocol for the Internet of Things (IoT). It is designed as an extremely lightweight publish/subscribe messaging transport that is ideal for connecting remote devices with a small code footprint and minimal network bandwidth.
Blocks
| MQTT Client Subscribe | Read messages from subscribed MQTT topics (Since R2025a) |
| MQTT Client Publish | Publish messages to MQTT Topics (Since R2025a) |
Functions
mqttclient | Create MQTT client connected to broker (Since R2022a) |
subscribe | Subscribe to MQTT topic (Since R2022a) |
read | Read available messages from MQTT topic (Since R2022a) |
write | Write message to MQTT topic (Since R2022a) |
unsubscribe | Unsubscribe from MQTT topics (Since R2022a) |
peek | View most recent message from MQTT topic (Since R2022a) |
flush | Clear received MQTT messages (Since R2022a) |
Topics
- Configure MQTT Client in Simulink
Configure MQTT clients for model. (Since R2025a)
Related Information
Featured Examples
Get Started with MQTT
Connect and communicate with an MQTT broker in MATLAB®.
Subscribe to MQTT Wildcard Topic
Use an MQTT client to subscribe to a wildcard topic.
Subscribe to MQTT Topic with Callback Function
Use an MQTT client to subscribe to a topic with a callback function.
Get Data from Subscribed Topics in MQTT Client
Get data from subscribed topics in an MQTT client.
Communicate Securely with ThingSpeak MQTT Broker
Establish a secure connection and communicate with the ThingSpeak MQTT broker in MATLAB®.
Industrial Process Monitoring Using MQTT
Monitor an industrial process using the MQTT Client blocks in Simulink®. You can connect to an MQTT broker using a Simulink model that acts as an MQTT client. You can publish messages to an MQTT topic using the MQTT Client Publish block and read messages from a topic using the MQTT Client Subscribe block.
