MQTT
MQTT [Message Queuing Telemetry Transport], expressed as a message queue telemetry transport protocol;
it is a "lightweight" communication protocol based on the Publish/Subscribe (Publish/Subscribe) mode, which is built on the TCP/IP protocol.
The biggest advantage of MQTT is that it can provide reliable message services for connected remote devices with very few codes and limited bandwidth; Wider range of applications.
MQTT is a client-server based message publish/subscribe transport protocol. The MQTT protocol is lightweight, simple, open and easy to implement. These characteristics make it widely applicable. In many cases, including constrained environments such as: machine-to-machine (M2M) communications and the Internet of Things (IoT); among other things, sensors
communicating via satellite links, occasional dial-up medical devices, smart homes, and some small It has been widely used in chemical equipment.
MQTT client
An application or device using the MQTT protocol that always establishes a network connection to a server. Clients can:
① Publish information that other clients may subscribe to;
② Subscribe to messages published by other clients;
③ Unsubscribe or delete messages from the application;
④ Disconnect from the server.
MQTT server
The MQTT server is called a "message broker" (Broker), which can be an application or a device. It is located between message publishers and subscribers, it can:
①Accept network connections from clients;
②Accept application information published by clients;
③Process subscription and unsubscribe requests from clients;
④Forward application messages to subscribed clients.
Note:
Likes, comments, and reprints are welcome. Please give the link to the original text in an obvious place on the article page
. Those who know, thank you for reading my article in the vast crowd.
Where is the signature without personality!
For details, please follow me
and continue to update
| © 2021 08 - Guyu.com | 【All rights reserved】 |