Here is my presentation to Sigfox @ PiAndMore 10 (University Trier, 24.06.2017)
Sigfox_PiAndMore10.pdf (1,7 MB, PDF)
This presentation was not sponsored or supported by Sigfox, however, Wisol gave me Evaluation Boards to test the Sigfox network, thanks a lot!
Videorecording of the talk can be found here