Introduction to MQTT
The MQTT protocol is an instant communication protocol for IoT applications. It uses TCP/IP for network connection, which can realize message shielding and transmission of load content at low costs, and effectively reduce network traffic.
Features and functions
Long connection protocol
Terminal data point reporting, supporting the following types of data points: e.g.
Int
Float
String
JSON format
Binary data
Platform message sending
Topic-based subscription, publishing and message push for unicast and multicast of messages between devices
Typical application scenarios
The MQTT protocol is suitable for scenarios involving a long connection between the device and platform. It features the unicast and multicast of messages between devices, and management and control of real devices via the application server, independent of other services (command issuing service, push service and the like).