OASIS members and other interested parties,Â
OASIS and the OASIS Message Queuing Telemetry Transport (MQTT) TC  are pleased to announce that MQTT Version 5.0 has been approved as a Candidate OASIS Standard (COS) . The COS now enters a 60-day public review period in preparation for a member ballot to consider its approval as an OASIS Standard.
MQTT is a client/server publish/subscribe messaging transport protocol. It is lightweight, open, simple, and designed to be easy to implement. These characteristics make it ideal for use in many situations, including constrained environments such as for communication in Machine to Machine (M2M) and Internet of Things (IoT) contexts where a small code footprint is required and/or network bandwidth is at a premium.
The protocol runs over TCP/IP, or over other network protocols that provide ordered, lossless, bi-directional connections.
The TC received 4 Statements of Use from HiveMQ, IBM, the Eclipse Paho Project, and VerneMQ .
The candidate specification and related files are available here:
MQTT Version 5.0
Candidate OASIS Standard 01
31 October 2018
Editable source (Authoritative):
For your convenience, OASIS provides a complete package of the specification document and any related files in ZIP distribution files. You can download the ZIP file at:
Public Review Period:
The 60-day public review starts 16 November 2018 at 00:00 UTC and ends 14 January 2019 at 23:59 UTC.
This is an open invitation to comment. OASIS solicits feedback from potential users, developers and others, whether OASIS members or not, for the sake of improving the interoperability and quality of its technical work.
Comments may be submitted to the TC by any person through the use of the OASIS TC Comment Facility as explained in the instructions located via the button labeled "Send A Comment" at the top of the TC public home page, or directly at:
Comments submitted by TC non-members for this work and for other work of this TC are publicly archived and can be viewed at:
All comments submitted to OASIS are subject to the OASIS Feedback License, which ensures that the feedback you provide carries the same obligations at least as the obligations of the TC members. In connection with this public review of âMQTT Version 5.0,â we call your attention to the OASIS IPR Policy  applicable especially  to the work of this technical committee. All members of the TC should be familiar with this document, which may create obligations regarding the disclosure and availability of a member's patent, copyright, trademark and license rights that read on an approved OASIS specification.Â
OASIS invites any persons who know of any such claims to disclose these if they may be essential to the implementation of the above specification, so that notice of them may be posted to the notice page for this TC's work.
 OASIS Message Queuing Telemetry Transport (MQTT) TCÂ
 Approval ballot:Â
 Statements of Use:Â
Chief Technical Community Steward
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