This year in local Hackerspace in Gdańsk there was a series of meetups about Open Source related topics. I participated in one of them - IoT workshop about The Things Network and LoRaWAN by Inżynier Domu.
To be short: LoRaWAN is an open network for IoT devices which provides possibility to communicate eg. with a server side application. Interesting standard, but unfortunately not so popular in Poland yet (only one gateway in hs range - at Gdansk University of Technology).
Photos from: https://www.facebook.com/pg/hackerspacetrojmiasto/posts