SUBZero - A Simple Network-Attached Storage Device
Best go check the gps time syncing on that gateway! 
https://www.theregister.co.uk/2019/02/12/current_gps_epoch_ends/
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Good TTN/TTI/Wienke/TTN-COnf announcements coverage 
@wienkegiezeman
https://www.eetimes.com/document.asp?doc_id=1334315
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Sigfox opens radio spec - BSN’s remain closed…
try this puzzle - https://www.jigsawplanet.com/?rc=play&pid=1c1e385f8df4
or make your own - https://www.jigsawplanet.com/?rc=createpuzzle&ret=%2F
