It is a wireless communication standard for short range, ultra-low-power personal area network operated in the unlicensed 2.4 GHz ISM band. Bluetooth Low Energy, which was initially advertised as “Bluetooth Smart”, is a light-weight independent branch of the original “now known as Classic Bluetooth ” and was introduced as part of the Bluetooth 4.0 core specification in 2010. Bluetooth Low Energy vs Bluetooth Classicīefore we examine the BLE architecture, we will first compare it to Bluetooth Classic. In the exercise section of this lesson, you will be introduced to the general structure of a connection-orinted BLE firmware, and the minimum nRF5 SDK modules needed to make a BLE device discoverable and connectable. Gaining fundamental knowledge about the BLE architecture will pay off, and will significantly help when we reach Lesson 4, and start diving into Nordic Semiconductor BLE Protocol Stack (SoftDevice) API. We will also understand the main differences between Bluetooth Low Energy and Bluetooth Classic. The key information needed to get started with BLE on an nRF5x chip is provided per each layer of the architecture. In this lesson we will take a look at the Bluetooth Low Energy (BLE) protocol, its versions and architecture.
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