Application

We will develop multiple applications for several IoT and Bluetooth Low Energy use cases throughout the course of this book and these applications will be hosted in the application layer of a Bluetooth Low Energy compatible device. This is the layer which will contain the user interface, application logic, and the overall application architecture.

A working knowledge of this layer is necessary to start building Bluetooth Low Energy oriented applications. However, it is always good to know what goes under the hood and how our application talks to the underlying Bluetooth Low Energy hardware/chipset; hence, we will also explore the host and the controller layers.