It is designed for connections with remote locations where a "small code footprint" is required or the network bandwidth is limited.
All comparison categories use the stable version of each implementation listed in the overview section.
The security provided by SSL/TLS may be desirable depending on the type traffic being sent between devices, as MQTT transmits messages in the clear.
Quality of service is the ability to provide different priority to different applications, users, or data flows, or to guarantee a certain level of performance to a data flow.A description of each QoS level is found below.
Portability concerns in this section refers to technical details that may be deciding factors in selecting an implementation to use.