ESP8266 Community Forum

You use the binary from here: https://github.com/martin-ger/esp_mqtt right?

The issue is resolved.
set broker_user xxxx is a necessary condition prior to using show mqtt . If this is not done the response is invalid command ......no broker set could be a better response than invalid command but it is just a very minor issue.

Here a video that explains the ideas and the architecture of the project (not yet a real "HowTo"):

Great work with the video......szenario should be scenario (on last slide)