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Lesson 1 –  Bluetooth LE Introduction

Overview

Bluetooth is a widely used wireless communication technology standard managed by the Bluetooth Special Interest Group (SIG). The Bluetooth Low Energy (LE) protocol is regarded as a different protocol from Bluetooth Classic, and is designed to transmit smaller amounts of data at relatively lower data rates, thus providing lower power consumption.

In this lesson, we will start by introducing Bluetooth LE and its stack layers. Then we will briefly discuss how Bluetooth LE connections take place, covering concepts like advertising and scanning. Subsequently, we will present possible network topologies and Physical Layer (PHY) modes.

In the exercise section, we will practice flashing a Bluetooth LE sample to your Nordic device and using Bluetooth LE to read buttons and control LEDs.

Objectives

  • Examine the Bluetooth LE protocol and understand the roles of its different layers.
  • Get an overview of the Bluetooth LE architecture.
  • Learn about the available device roles and communication topology options.
  • Understand the basics of data representation and exchange.
  • Practice through a hands-on exercise, using the “nRF Connect for Mobile” app, how to:
    • Read the status of a button on your Nordic device
    • Toggle a LED on your Nordic device
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