I would be very careful with IOTA, many people think it is not gonna works as supposed. Check this article:
https://hackernoon.com/why-i-find-iota-deeply-alarming-934f1908194b

for me the biggest problem is that IOTA uses ternary sytem, which is not supported by systems they plan to run it on (which are binary). so this need conversion layer. they take space but IoT devices have very limited space. how is it gonna work then?
be careful guys.