Similarly, clients can subscribe to a topic to be notified when a message is published.Īn MQTT broker is a central software entity in the MQTT architecture. Client devices can publish data to a topic to send messages to any subscribers. The pub/sub model is at the core of MQTT communication. As a result, it is popular in use cases ranging from low-powered embedded systems to cloud-native microservices. MQTT is efficient in its utilization of bandwidth and system resources. Since the protocol handles more than “Message Queuing” and “Telemetry Transport”, the term MQTT is commonly used as the protocol’s name instead of being thought of as an acronym for a longer name. It is most commonly run over TCP/IP stack, but there are MQTT implementations that use other protocols (e.g. MQTT is an open-source pub/sub communication protocol created by Andy Stanford-Clark and Arlen Nipper. To make sure you have a complete picture, we’ll start with an overview of MQTT and then dive into the specific role brokers play in communications. In this article, we'll review MQTT brokers in-depth. Using MQTT brokers to enable the publish/subscribe (pub/sub) communication model helps make MQTT a highly efficient and scalable protocol. Specifically, an MQTT broker receives messages published by clients, filters the messages by topic, and distributes them to subscribers. This article explains the functionality of its central hub known as the MQTT broker, compares its various implementations, and reviews its use cases, features, and best practices.Īn MQTT broker is an intermediary entity that enables MQTT clients to communicate.

MQTT is a lightweight protocol that supports the Internet of Things (IoT).

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