Why MQTT protocol becomes the M2M communication solution (I)-EEWORLD

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Telemetry is a relatively old concept in the field of communications. In the early 20th century, sensors had the ability to send signals over long distances, allowing scientists to remotely monitor terminal machines and other activities. Now, with the help of computer processors, machines can receive data from sensors and other machines and perform related operations, thus realizing machine-to-machine (M2M) communication. Today, with the widespread use of the Internet in the field of data and information communication, it is urgent to develop standard protocols.

The specific meaning of the Internet of Things varies depending on the purpose. In terms of business and industry, it can be divided into two categories: Industrial Internet of Things (IIoT) and Internet of Things (IoT). The main differences between the two are:

1) IoT can be used in many market segments, including consumer goods, agriculture, manufacturing, and healthcare, while IIoT is mainly aimed at industrial applications, such as manufacturing and energy industries. IoT covers a wider range, and IIoT is just a subset of IoT.

2) While IoT focuses primarily on consumers, IIoT is used to access as much data as possible to adjust industrial manufacturing processes and maximize supply chain efficiency.

3) While IoT can generate a large amount of data to enhance the consumer experience, IIoT data is larger and more important to ensure the safety of operational processes and related personnel.

The main challenge facing the development of IoT and IIoT is how to deal with the large amount of data collected.

What exactly is MQTT?

This was my first reaction to this interesting topic. First, let’s understand what these acronyms mean:

Message: Simply put, MQTT includes a data source that publishes messages to a "broker", which then pushes the messages to all devices or terminals that have subscribed to the topic.

Queue or Queuing: Despite the word "queue" in the name, MQTT is not a queue-based protocol, and this term is obviously not used in the entire protocol.

Telemetry: The key to IoT and IIoT, data transmission is the core of telemetry technology.

Transport: Point-to-point data transfer through a central hub or proxy.

MQTT is a simple hub-and-spoke system: communication between sensors, applications, and devices is achieved through a central agent running in a data center. Devices will not try to communicate with each other because all data must go through the central agent, from a processing demand perspective. MQTT is lightweight, so it can be used for a variety of applications in network environments with limited bandwidth and latency (such as a typical manufacturing site). MQTT is simple and fast, and the entire operation is divided into: connection, authentication, communication, and termination. As the amount of data increases, the simplicity and lightweight of the MQTT protocol make it very scalable. The MQTT protocol is ideal for large, remote network systems involving many sensors (such as transmission lines, pipelines, and oil wells).

More exciting content to be continued......

By Steve Schriber

Original link:

https://www.mouser.cn/blog/mqtt-protocol-the-solution-for-machine-to-machine-communications

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Reference address：Why MQTT protocol becomes the M2M communication solution (I)

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