Document MQTT

[buchbergerd]

Feature Request

Summary

In the last release, you added MQTT support. That's great :) However, I cannot find any documentation on how to use it. Which messages are used, what is possible with it?
Please add a description, e.g. at the same place where the other docs are: docs
docs/OpenMobileNetworkToolkit.md

Context

Documentation is important for others to be able to use your app.

Proposed Solution

More documentation

Alternatives Considered

n/a

Additional Context

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Related Issues

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[hajoha]

Yes thanks for the reminder, will do this!