Real-time chat applications have become an increasingly popular means of communication. A lot of applications and online tools are now present in the market that allows users to chat with anyone in real-time. In addition to one on one chats, chat rooms are pretty common too. In this series, we are going to introduce a new way of making a Chat app with Node and React JS with a little help of a MQTT broker.

The series is broken into 3 parts, this is part -1 of the series where we introduce the MQTT protocol and the open-source MQTT broker called EMQX.

Introduction to MQTT and EMQX

MQTT is a popular and widely-used IoT messaging protocol that enables communication between devices and applications. MQTT stands for Message Queuing Telemetry Transport, and it was designed to be lightweight, efficient, and easy to implement. The protocol is based on publish/subscribe messaging, which means that devices can both publish data and subscribe to data streams.

Find the next part of the series here.

EMQ X is an open-source MQTT broker that provides a scalable, reliable, and secure way of handling IoT communication. EMQ X supports the latest MQTT 5.0 standard and is designed to handle millions of devices and billions of messages. In this blog, we will explain the basics of MQTT protocol and how EMQ X can be used to implement it.

MQTT Basics

Chat app with Node and React JS

MQTT operates on a publish/subscribe model, where devices and applications can either publish data or subscribe to data streams. The basic components of the MQTT system include clients, brokers, and topics.

Clients: These are the devices or applications that communicate with each other. Clients can publish data to topics and subscribe to topics to receive data.

Broker: This is the central component of the MQTT system that acts as a message broker. The broker receives messages from clients, stores them, and routes them to the appropriate subscribers.

Topics: Topics are used to categorize data and control who receives it. Clients can publish data to specific topics, and other clients can subscribe to those topics to receive the data.

MQTT operates over TCP/IP, and it uses a binary protocol to send messages. The protocol is designed to be lightweight, with a small packet size and low overhead, making it suitable for use in resource-constrained environments like IoT devices.

EMQ X

EMQ X is a high-performance, scalable, and secure MQTT broker that is designed to handle the communication needs of IoT devices. EMQ X provides many features that make it easy to implement and manage an MQTT-based system, including:

  • Scalability: EMQ X is designed to scale to handle millions of devices and billions of messages, making it suitable for use in large-scale IoT systems.
  • Reliability: EMQ X provides features like message persistence, message queuing, and message delivery assurance to ensure that messages are delivered even in the case of network failures or other problems.
  • Security: EMQ X provides features like SSL/TLS encryption, authentication, and authorization to ensure that communication is secure and that only authorized devices and applications can access data.
  • Flexibility: EMQ X provides a flexible plugin architecture that makes it easy to extend the functionality of the broker and integrate it with other systems.

Find the next part of the series here.

In conclusion, MQTT is a widely-used and popular IoT messaging protocol that provides a scalable, reliable, and secure way of handling communication between devices and applications. EMQ X is a powerful MQTT broker that provides many features to make it easy to implement and manage an MQTT-based system. Whether you’re building a small IoT project or a large-scale industrial system, EMQ X can help you get the most out of your MQTT-based communication.


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