When a Wearable Meets an iPhone

Developing an iOS app that needs to interact with a custom wearable device via a Bluetooth Low Energy connection seems like an unusual experience, that couldn’t possibly have anything to do with you. But the Internet of Things is here and it’s yummy, so who knows when this might happen to you?
I’d like to tell you a few stories about my experience, between hacks, bit bashing, and why you shouldn’t trust any iOS changelog, along with clever code samples… and code samples I’m still ashamed of :)