2022-02-28 WPF upper computer 126 understand mqtt

The Internet of things and MQTT

1、 What is? MQTT？

MQTT（Message Queuing Telemetry Transport, Message queuing telemetry transmission protocol ）, It's based on publishing / Subscription mode “ Lightweight ”
Communication protocol , The agreement is built on TCP/IP Agreement on , from IBM stay 1999 Released in .
Based on the release / A subscription model 、 Lightweight （5G Speed 、 Packet size ）
agreement （ Format of data bytes , This process needs to be further implemented when using 、 The agreement is extensive （ Existing communication library ））
More complete implementation , Understand the structure of the protocol
MQTT 3.1 5.0（ Some changes ）

2、 Why MQTT？

Very little data to complete remote communication （ Low network overhead ） RabbitMQ（AMQP） subscribe / Release / consumption

3、 How to communicate ？MQTT Communication participants and messages

Two kinds of objects （ client （ Publisher / subscriber ）/ Server side ）、 news （ The theme Topic、 Message body Payload）

4、 How to communicate ？

subscribe 、 The theme 、 load 、 Release

Two 、 Environmental tools

1、MQTT Communication server EMQX（ Self deployment ）
2、MQTT Communication client MQTT.FX(JDK)
MQTTNET（C# Development ）
3、WireShark