> For the complete documentation index, see [llms.txt](https://mcxiaoke.gitbook.io/mqtt/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mcxiaoke.gitbook.io/mqtt/03-controlpackets.md).

# 第三章 – MQTT控制报文

## 目录

* [第一章 - 介绍](/mqtt/01-introduction.md)
* [第二章 – MQTT控制报文格式](/mqtt/02-controlpacketformat.md)
* [第三章 – MQTT控制报文](/mqtt/03-controlpackets.md)
* [第四章 – 操作行为](/mqtt/04-operationalbehavior.md)
* [第五章 – 安全](/mqtt/05-security.md)
* [第六章 – 使用WebSocket](/mqtt/06-websocket.md)
* [第七章 – 一致性目标](/mqtt/07-conformance.md)
* [附录B - 强制性规范声明](/mqtt/08-appendixb.md)

## 本章目录

* [3.1 CONNECT – 连接服务端](/mqtt/03-controlpackets/0301-connect.md)
* [3.2 CONNACK – 确认连接请求](/mqtt/03-controlpackets/0302-connack.md)
* [3.3 PUBLISH – 发布消息](/mqtt/03-controlpackets/0303-publish.md)
* [3.4 PUBACK –发布确认](/mqtt/03-controlpackets/0304-puback.md)
* [3.5 PUBREC – 发布收到（QoS 2，第一步）](/mqtt/03-controlpackets/0305-pubrec.md)
* [3.6 PUBREL – 发布释放（QoS 2，第二步）](/mqtt/03-controlpackets/0306-pubrel.md)
* [3.7 PUBCOMP – 发布完成（QoS 2，第三步）](/mqtt/03-controlpackets/0307-pubcomp.md)
* [3.8 SUBSCRIBE - 订阅主题](/mqtt/03-controlpackets/0308-subscribe.md)
* [3.9 SUBACK – 订阅确认](/mqtt/03-controlpackets/0309-suback.md)
* [3.10 UNSUBSCRIBE –取消订阅](/mqtt/03-controlpackets/0310-unsubscribe.md)
* [3.11 UNSUBACK – 取消订阅确认](/mqtt/03-controlpackets/0311-unsuback.md)
* [3.12 PINGREQ – 心跳请求](/mqtt/03-controlpackets/0312-pingreq.md)
* [3.13 PINGRESP – 心跳响应](/mqtt/03-controlpackets/0313-pingresp.md)
* [3.14 DISCONNECT –断开连接](/mqtt/03-controlpackets/0314-disconnect.md)

### 项目主页

* [MQTT协议中文版](https://github.com/mcxiaoke/mqtt)