In order to learn more about GNU Radio and HackRF, so that tackling more complex scenarios like The DARC side of Munich become easier, it was time to go for a much simpler training target: Those cheap RF controlled wall plugs you can use to remote control the power outlets. Now, I'm not talking about FS20, x10 or HomeMatic devices but the really cheap ones you can usually buy in sets of three combined with a handheld remote controller for 10-20 EUR.
It took quite a bit of tinkering and a couple of clarifying sessions on IRC (Thanks to lbt and aholler for their input and support), to deploy the local Spark-Cloud test setup and interpret/abstract the scattered docs into one whole system view model. But why go through all this hassle, when you can just comfortably use the “official” spark.io cloud service to develop & manage your cores instantly?
When you leave the commercial/proprietary software ecosphere and jump into open-source operating systems, you will have to learn how to handle daemons. And once you've created a couple of those daemons yourself, taught them what to do and let them work in production, you gain a lot of experience and confidence in dealing with all kinds of daemons.