Introduction

Microchip’s RNBD451 Bluetooth^® Low Energy module has fully certified 5.2 connectivity in compact form. With all of its advanced features, it simplifies the integration of Bluetooth Low Energy connectivity into designs, reducing the need for extensive engineering efforts.

The RNBD451 module utilizes an ASCII-based control interface that communicates over UART, making configuration straightforward without the need for complex configuration tools or coding. The RNBD451 module supports both peripheral and central Generic Access Profile (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-specific enhancements such as “Advertising Extension”. This feature expands the possibilities for configuring 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).