The Mighty MQTT! What You Should Know About It

Being always up-to-date with real-time information is a requirement for IoT users. Luckily, we have MQTT to help us make this a reality in your next big project.

A machine-to-machine (M2M) connectivity protocol for IoT, Message Queuing Telemetry Transport or MQTT, is used to send and receive messages in for machine-to-machine telemetry in low bandwidth environments.

Ever since its standardization, the protocol has been easy to adapt for a wide variety of IoT devices, platforms, and operating systems!

There are different variants and versions of MQTT for your use, like MQTT v5 and MQTT-SN.

Some basic concepts we need to know to understand MQTT functions better include:

The publish-and-subscribe system, which allows devices to publish a message on a topic. Alternatively, it can also be subscribed to a particular topic to receive messages.

Messages are the information we want to exchange and topics are the categorization of the messages.

MQTT clients are the devices that are subscribed to one or more topics, while MQTT brokers are the client’s counterpart responsible for receiving, filtering, and sending messages to clients.

MQTT security is the ability to support various authentications and data security mechanisms that are configured on the MQTT broker.

Although it has some downsides, MQTT is still one of the most preferred protocols because of its speed, efficiency, and security. RAKwireless uses a built-in MQTT bridge in some of the company’s commercial gateways, like the RAK7249 and RAK7258, to enhance the devices’ capabilities. Learn more about the wonders of MQTT here:

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