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MQTT V3.1协议规范(中文版)

MQTT

V3.1

协议规范

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MQTT协议中文翻译，保留了原文的格式，可以对照阅读，英文地址：http://public.dhe.ibm.com/software/dw/webservices/ws-mqtt/mqtt-v3r1.html，对于学习MQTT协议十分有帮助。看得懂原文的，可以直接看原文。

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b

• International Business Machines Corporation (IBM)

• Eurotech

b

b http://public.dhe.ibm.com/software/dw/webservices/ws-mqtt/mqtt-v3r1.html





MQ MQ Telemetry TransportaMQTTfo/

a。

aaib

• ai

• pa

b

• /afa

• i

•  TCP/IP 

•  3 ob

§ “f”a TCP/IP mf

haamfarh

f

§ “f”aa

§ “f”akffa

pam

• a 2 aa



• fapa Last Will  Testament 





reserved.

Permission to copy and display the MQ Telemetry Transport specification (the

"Specification"), in any medium without fee or royalty is hereby granted by Eurotech and

International Business Machines Corporation (IBM) (collectively, the "Authors"), provided

that you include the following on ALL copies of the Specification, or portions thereof, that

you make:

A link or URL to the Specification at one of the Authors' websites. The copyright notice as

shown in the Specification. The Authors each agree to grant you a royalty-free license,

under reasonable, non-discriminatory terms and conditions to their respective patents that

they deem necessary to implement the Specification. THE SPECIFICATION IS

PROVIDED "AS IS," AND THE AUTHORS MAKE NO REPRESENTATIONS OR

WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,

WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,

NON-INFRINGEMENT, OR TITLE; THAT THE CONTENTS OF THE SPECIFICATION

ARE SUITABLE FOR ANY PURPOSE; NOR THAT THE IMPLEMENTATION OF SUCH

CONTENTS WILL NOT INFRINGE ANY THIRD PARTY PATENTS, COPYRIGHTS,

TRADEMARKS OR OTHER RIGHTS. THE AUTHORS WILL NOT BE LIABLE FOR ANY

DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES

ARISING OUT OF OR RELATING TO ANY USE OR DISTRIBUTION OF THE

SPECIFICATION.

The name and trademarks of the Authors may NOT be used in any manner, including

advertising or publicity pertaining to the Specification or its contents without specific,

written prior permission. Title to copyright in the Specification will at all times remain with

the Authors.

No other rights are granted by implication, estoppel or otherwise.



1. 。

• 1.1 V3.1  V3 x

2. 

• 2.1 

• 2.2 

• 2.3 

• 2.4 

• 2.5 MQTT  UTF-8

• 2.6 

3. 

• 3.1 CONNECT

• 3.2 CONNACK

• 3.3 PUBLISH

• 3.4 PUBACK

• 3.5 PUBREC

• 3.6 PUBREL

• 3.7 PUBCOMP

• 3.8 SUBSCRIBE

• 3.9 SUBACK

• 3.10 UNSUBSCRIBE

• 3.11 UNSUBACK

• 3.12 PINGREQ

• 3.13 PINGRESP

• 3.14 DISCONNECT

4. 

• 4.1 

• 4.2 

• 4.3 

5.  A s

。

sr 3 osb

• 

• 

• x

pstopic wildcards

1.1 V3.1



x

MQTT V3.1 p MQTT V3 xihb

• a CONNECT pf

• rfa CONNACK pz

•  PUBLISH  SUBSCRIBE ai

aiika MQTT y



• MQTT p UTF-8 ai US-ASCII 

V3.1 pa CONNECT “3”a V3 

 MQTT V3 “Remaining Length”a

 V3.1 



o MQTT zfopf

foforp



2.1



Fixed header



o MQTT foh

Byte 1

 DUPaQoS level  RETAIN

Byte 2

 1 oa 4 o

h big-endianb

papfo 16 

pMSBaLSB



Message Type





bbyte 1, bits 7-4

r 4-bit pth

(b

)b

*b

+b

,b

b ) 

b * 

/b + 

0b

1b

)(b

剩余49页未读，继续阅读

aa201314

2016-11-09

表总是少一段，不完整

MQTTv3.1中文版-带书签.pdf

非常火的MQTT，资源很实用，里面有书签，内容很细致，我也是用的好所以转过来，让更多人学习

MQTTv3.1中文版

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