Events

Maritime Hackers Meetup - organised by river. Come and talk about boats / sailing / hacking, and NYAN!

Reticulum at 37C3

Chaoswelle - CCC radio amateurs. May have LoRa APRS and meshtastic nodes.

Freifunk - WiFi mesh network. Will have a space at Bits&Bäume.

Cracow Linux Users Group Assembly - mentions a DIY AIS device.