There is an article in the latest issue of the ´ct magazine (major german computer mag). Nice to read about OMG 
Smart Home: Bluetooth-Präsenzerkennung mit OpenMQTTGateway | heise online
(paywall i think)
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Thanks for sharing !
Is there a non paywalled version available?
Does not look like it. But you could ask the author Andrijan Möcker (amo@ct.de).
Im sure he will send the people behind this great project the article, maybe even in print 
.
If not, pm me.