Today, we will share a solution for communication between machines: the MQTT protocol.MQTT is an acronym for Message, Queue, Telemetry, and Transport.
The specific meaning is as follows:
1. Message: Simply put, MQTT includes a data source that publishes topic messages to a broker, which then sends the messages to all devices or terminals that have subscribed to the topic
2. Queue (or queuing): Although the name contains the word 'queue', MQTT is not a queue based protocol, and it is evident that this term has not been used throughout the entire protocol update process
3. Telemetry: The key to IoT and IIoT is the transmission of data, which is the core of telemetry technology
4. Transport: Point to point data transmission is done through a central hub or broker
MQTT is a simple central radiation system: communication between sensors, applications, and devices is achieved through data center services running on the central agent end. Devices also do not attempt to communicate with each other, as all data passes through a central agent. From the perspective of processing requirements, MQTT is lightweight, making it well suited for various applications in bandwidth and latency limited network environments (such as typical production manufacturing sites). MQTT sessions are simple and fast: connection, authentication, communication, and termination. With the growth of data volume, the simplicity and lightweight of the MQTT protocol make it highly scalable. The MQTT protocol is an ideal choice for large remote network systems involving many sensors, such as transmission line systems, long-distance pipelines, and oil wells.
Application examples
In addition to being able to monitor long-distance oil pipelines and other energy transmission scenarios, MQTT's compact and low bandwidth characteristics make it suitable for many other applications. home automation applications, including heating, ventilation, air conditioning (HVAC), lighting, intelligent devices and security, all use the MQTT protocol. Home gardening can also be very high-tech, where users subscribe to messages from light, temperature, and humidity sensors to obtain real-time data on site, and then can automatically adjust the watering program remotely based on the data. Geeks even use the MQTT protocol and Arduino or Raspberry Pi to control Christmas lights. Medical monitoring, transportation network monitoring, asset tracking, environmental status checks, climate data recording, and automatic booth monitoring are all examples of using the MQTT protocol.
Summary:
Timely and accurate information is very useful for improving the performance of consumer IoT and industrial internet of things (IIoT) systems. With more and more data available for interpretation and use, it is essential to establish information sharing protocols and methods. In the M2M communication field, MQTT will become an important protocol, which improves the scalability of the system and reduces the delay of long-distance transmission to the lower limit, The bandwidth occupation is low and the impact of transmission process interruption is also small.
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