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User Guide

© 2023 Microchip Technology Inc. and its subsidiaries

DS50003467B - 1

Introducon

Microchip’s RNBD451 Bluetooth

®

Low Energy module has fully certied 5.2 connectivity in compact form. With

all of its advanced features, it simplies the integration of Bluetooth Low Energy connectivity into designs,

reducing the need for extensive engineering eorts.

The RNBD451 module utilizes an ASCII-based control interface that communicates over UART, making

conguration straightforward without the need for complex conguration tools or coding. The RNBD451

module supports both peripheral and central Generic Access Prole (GAP) roles, actively scanning for other

connectable devices.

Notably, the RNBD451 module fully supports Bluetooth features like Data Length Extension (DLE) and Bluetooth

Low Energy secured connections, which are enabled by default. DLE increases the Bluetooth Low Energy packet

Protocol Data Unit (PDU) length leading to higher throughput. LE secure connections feature support provides

additional security during pairing against passive eavesdropping.

In addition to these features, the RNBD451 module also embraces Bluetooth 5.x-specic enhancements such

as “Advertising Extension”. This feature expands the possibilities for conguring advertisement data, making it

suitable for various Bluetooth Low Energy beacon applications. Furthermore, the module supports additional

Physical Layer (PHY) options beyond the original 1M, including 2M with double symbol rate (for increased

throughput) and Coded (for extended range).

Features

•Fully RF-Certied Bluetooth Low Energy Module

•Compact Form Factor

•On-Board Bluetooth 5.2 Low Energy Stack

•ASCII Command Interface Over UART

•Host Controller Interface (HCI) Mode

•ASCII Commands are Backward Compatible with RN487x Family of Modules

•Beacon Support

•Built-in Microchip Transparent Prole for UART Data Streaming

•Over-the-Air (OTA) Remote Conguration

•Embedded Enhanced Security

•2M Uncoded PHY and Long Range (Coded PHY)

•Extended Advertising

•Data Length Extensions and Secure Connections

•Bluetooth Low Energy Privacy 1.2 with Up to Eight Resolvable and Accept Lists

•UART-Based Device Firmware Update (DFU)

•Built-in Microchip OTA Prole with Client and Server Role for OTA DFU Execution

–OTA device rmware update

–OTAPC device rmware update on peer RNBD451 device

RNBD451 Bluetooth

®

Low Energy Module User’s Guide

RNBD451

Product specificaties