Bluetooth and Bluetooth Low Energy
Martin Sauter · 2021
Bluetooth connectivity has become an alternative to cables for many close-range data exchange applications, and is often used alongside the cellular radio technologies. This chapter provides an introduction to the physical properties of Bluetooth and the protocol stack. It describes relevant Bluetooth profiles and how they are used in practice in a wide range of applications and scenarios. The chapter then introduces Bluetooth Low Energy and its use for Internet of Things applications. Up to version 1.2 of the standard, the maximum datarate of a Bluetooth transmission channel was 780 kbit/s. A Bluetooth network in which several devices communicate with each other is called a 'piconet.' In order for several Bluetooth piconets to coexist in the same area, each piconet uses its own hopping sequence. Security plays an important role in the Bluetooth specifications.