This year this seems to be focusing on Arduino (not entirely intentional but cool!)
If you're working on an Arduino-related anything, or if you're just interested, this is for you.
BYOB BYOD (recommending zivania)

organisation pad: http://pad.hack66.info/p/HFD_2015
misaakidis will show us a couple of his projects
We're also planning to have a Open Software Bundle to disseminate