Introduction - If you have any usage issues, please Google them yourself
MQ Telemetry Transport (MQTT) is a lightweight broker-based publish/subscribe
messaging protocol designed to be open, simple, lightweight and easy to implement.
These characteristics make it ideal for use in constrained environments, for example,
but not limited to:
Where the network is expensive, has low bandwidth or is unreliable
When run on an embedded device with limited processor or memory resources