6.1 Introduction

In this clause the use of MQTT is profiled and the key elements of the binding are defined:

1. How a CSE or AE connects to MQTT.
2. How an Originator (CSE or AE) formulates a Request as an MQTT message, and transmits it to its intended Receiver.
3. How a Receiver listens for incoming Requests, and how it formulates and transmits a Response.
4. How the Mca and Mcc CRUD operations map to MQTT messages.

For more information on MQTT itself see Annex A or refer to the MQTT specification [1].