简介

MQTT （Message Queuing Telemetry Transport）是一种轻量级、基于发布-订阅模式的消息传输协议，这是一个位于OSI模型中的应用层，基于TCP协议。它适用于资源受限的设备和低带宽、高延迟或不稳定的网络环境。所以它在物联网场景中被大量使用，能够很好实现设备之间的高效通信。

MQTT is an OASIS standard messaging protocol for the Internet of Things (IoT). It is designed as an extremely lightweight publish/subscribe messaging transport that is ideal for connecting remote devices with a small code footprint and minimal network bandwidth. MQTT today is used in a wide variety of industries, such as automotive, manufacturing, telecommunications, oil and gas, etc.