How to implement message subscription and publication in MQTT Protocol

This article introduces how to subscribe and publish messages in MQTT protocol. The content is very detailed. Interested friends can use it for reference. I hope it will be helpful to you.

Subscription and publishing model

The subscription and publication of MQTT protocol is based on topic (Topic). A typical process of sending and receiving MQTT messages is as follows:

ClientA connects to Broker

ClientB connects to Broker and subscribes to the topic Topic1

ClientA sends a message to Broker with the subject Topic1

Broker receives a message from ClientA, discovers that ClientB subscribes to Topic1, and then forwards the message to ClientB

ClientB received the message from Broker.

On how to achieve the MQTT protocol in the message subscription and publishing to share here, I hope the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.