BLE Command Handlers

Introduction

Bluetooth® Low Energy (BLE) has become as a fundamental wireless communication technology known for its energy efficient design and versatility making it suitable for low power applications operating in the 2.4GHz unlicensed ISM frequency band.

When considering BLE's architecture from a high-level perspective, it can be visualized as a layered system (commonly referred to as the BLE stack) in which each distinct layer serves a specific function. Of these layers, the RCL is only concerned with the two lowest layers (i.e. Link Layer, Physical Layer) which deal with tasks such as connection establishment, data packet formatting and error control, and lower level tasks such as the actual transmission of data and control of hardware aspects such as radio frequencies and modulation.

This is accomplished in the RCL with the definition of command handlers which take care of the four fundamental operations that govern communication between devices: advertising, connection, scanning, initiating, and some additional command handlers useful for testing.

The following command handlers are currently available in the RCL:

• Advertiser Command Handler
• Secondary Channel Advertiser Command Handler
• Scanner Initiator Command Handler
• Connection Command Handler
• Direct Test Mode Tx Handler
• BLE5 Generic Rx Command Handler
• BLE5 Generic Tx Command Handler
• BLE5 Tx Test Command Handler

Usage

Architecture