© Ahmed Bakir 2018
Ahmed BakirProgram the Internet of Things with Swift for iOShttps://doi.org/10.1007/978-1-4842-3513-3_6

6. Building a Bluetooth LE Hardware Companion App

Ahmed Bakir1 
devAtelier, Tokyo, Japan

In Chapter 5, you dipped your toes into the world of embedded systems by building an Arduino-based wireless door sensor. In this chapter, you will continue your hardware engineering journey by developing the Bluetooth LE–based companion app for the door sensor. Bluetooth LE is an extremely popular radio-based communication protocol that allows devices to communicate at ranges up to 77 meters (~250 feet), with a very low-energy requirement, compared to other wireless communication methods (this is the LE part of Bluetooth LE).

One of the ...

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