In this chapter we spoke about the Internet of Things technology and how it is rooting in our real lives. The introduction of the Internet of Things was given in the form of wearable devices, autonomous vehicles, smart light bulbs, and portable media streaming devices. Internet of Things technologies like wireless local area network, mobile ad-hoc networks and ZigBee was discussed in order to have a better understanding of the available choices in the IoT. The technology discussion led us to the Bluetooth Low Energy, where the concepts and the technical structure of the Bluetooth Low Energy were discussed in great detail. The chapter introduced us to the Bluetooth stack and the key concepts like Attribute Profile, Generic Attribute Profile, GATT Server, GATT Client, UUIDs, Generic Access Profile, Service, Characteristics and the Bluetooth Security. Later we discussed Key Generation mechanism in the Bluetooth Low Energy, pairing, bonding, privacy and signing mechanisms. In the end we concluded with two major IoT platforms Bluetooth Low Energy brings and how Bluetooth beacons and Bluetooth Mesh can be the next big things in the Internet of Things.

In the next chapter we'll discuss different Hardware and Software tools available for Bluetooth Low Energy development.