![]() Here is a Github page detailing the main differences between MQTT v3.1.1 and MQTT v5. If you are wondering what happened to 4 then see here.įor More Information see MQTT v 5.0 New Features Overview The latest MQTT version(v5), has now been approved (Jan 2018). ![]() Here is the actual Specification MQTT V3.1 and here is a more detailed overview of the MQTT protocol packet structure. Here is a Github page detailing the main differences There is very little difference between v3.10 and 3.1.1. The original MQTT which was designed in 1999 and has been in use for many years and is designed for TCP/IP networks. There are two different variants of MQTT and several versions. MQTT is fast becoming one of the main protocols for IOT (internet of things) deployments. MQTT stands for MQ Telemetry Transport but previously was known as Message Queuing Telemetry Transport. It was designed by Andy Stanford-Clark (IBM) and Arlen Nipper in 1999 for connecting Oil Pipeline telemetry systems over satellite.Īlthough it started as a proprietary protocol it was released Royalty free in 2010 and became an OASIS standard in 2014. MQTT is a lightweight publish/subscribe messaging protocol designed for M2M (machine to machine) telemetry in low bandwidth environments.
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