mqtt-sn broker based on the mqtt-sn 1.2 spec

Jeff Katz <kraln@kraln.com>, someone with way too much and yet somehow not enough time on their hands.

I was leading tech at a shop where the backend was written in Python, and so when we decided to introduce a new, standards-based IoT protocol for our devices and infrastructure, and chose MQTT-SN, we wanted our a broker that fit with the rest of our system.

what ---As there are very few broker implementations, and the concept of the broker is very similar to our previous in-house prototcol, we've decided to write a standards-compilant MQTT-SN broker in Python.

As we expect many, many devices connected to our system, all state is stored in a redis cluster, allowing many broker processes to collaborate

Python 3, libuv, asyncio, and redis. and love.

My stuff is MPLv2. Other stuff is as per their files.