Friday, June 13, 2014

Summary of MQTT

MQTT (Message Queue Telemetry Transport)

The official Website

http://mqtt.org/

The final version of MQTT is 3.1


The final version of MQTT-SN (SN or S, Sensor Network) is 1.2
The client is WSN node (Wireless Sensor Network, like ZigBee), and we need broker like MQTT-S Gateway.

The spec sheet for MQTT is only 42 pages long and MQTT-S is only 28 pages long.

PT Informations to Help you Understand Better

Low Latency Messaging for Mobile Apps or When HTTP and Push Notification are Simply Not Enough
Building WSN with MQTT, RPi & Arduino

MQTT - MQ Telemetry Transport
Connecting Cars with IoT MQTT

Important Documents

IBM MQTT RedBook.  
Building Smarter Planet Solutions with MQTT and IBM WebSphere MQ Telemetry



Tips

.MQTT uses Network Byte / Bit ordering. (MSB is equal to bit<0>)
However, remaining length is in LSB-MSB order.