Feature: stream incoming serial data to an MQTT topic

[moehrem]

Concept says: create sensors with incoming data. Create these sensores based on the TETRA command. Update sensors, once there is a new message incoming.

But why not streaming the much less but still json formatted messages to an mqtt topic? Less work for me, more flexibility for the user.

User must be able to decide a topics name.
Is it possible to auto identify the devices with MQTT?

WIP

[moehrem]

I decided not to implement any MQTT publishing. Instead any message will be fired as HA-event. First implementation and documentation on that will be released with v0.4.0.