Gaitatzis T. Bluetooth Low Energy in iOS Swift 2017

Textbook in PDF format

In this book you will learn the basics of how to program Central and Peripheral devices that communicate over Bluetooth Low Energy using iOS in Swift. These tutorials will culminate in three projects:
A Beacon and Scanner
A Echo Server and Client
A Remote Controlled Device
Through the course of the book you will learn important concepts that relate to:
How Bluetooth Low Energy works,
How data is sent and received
Common paradigms for handling data
This book is an excellent read for anyone familiar with iOS programming, who wants to build an Internet of Things device or a tool that communicates with a Bluetooth device