There are many protocols for exchanging information, from the widespread HTTP to the rarely seen PeSIT. Despite this, a separate protocol has been developed for the Internet of Things – MQTT. Let’s figure out where and how it is used.
Table of Contents
MQTT is a specialized protocol for publishing small datasets on the Internet of Things. Its main area of application is the delivery of small messages, such as sensor readings.
Messages in MQTT are passed between three participants – publishers, broker and subscribers:
IoT devices (sensors) can be both publishers and subscribers. They need a subscription to receive telecontrol commands, update device configurations, and firmware versions. In this case, the system software sends the message through the broker, and the IoT device receives it.
The MQTT protocol has several features; let’s look at the main ones:
MQTT is well suited for IoT, as it is adapted to the characteristics of devices and communication channels. This protocol minimizes the computing power of intelligent devices and correctly delivers messages to the central node in an unstable connection.
The data has a different value and delivery priority, so the Quality of Service – QoS flags are provided in MQTT:
Let’s see where the MQTT protocol is most often used:
In large factories, intelligent sensors are installed on machine tools, transformers, cranes and forklifts. They monitor the operation of industrial devices and transmit data to a central analytical system. This allows companies to monitor equipment performance in real-time, predict wear and tear, and assess plant performance.
MQTT is used to analyze climate performance, seismic activity and building resilience. This allows predicting natural disasters and cataclysms, preventing the destruction of buildings.
Although initially created as the MQTT protocol for the Internet of Things, it is used to bill mobile operators and providers. They need to transmit information about the movement of money in customer accounts without losing it.
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