7.5.1 Introduction

The RNBD451 module supports a special feature called virtual sniffer. The Bluetooth virtual sniffer allows the user to capture and view live HCI traces in a supported packet analyzer tool (Frontline Wireless protocol suite) that runs locally on their test machine. The virtual sniffing function simplifies Bluetooth development and is easy-to-use functionality. This feature showcases the debug capability of the RNBD451 module, which helps the users to quickly fix issues by capturing and analyzing the packets exchanged between the RNBD451 module and peer device. This feature makes the RNBD451 module a more reliable device for the developers as it can even perform as a wireless packet sniffer, which eliminates the need for extra sniffing hardware.

In addition to the UART used for the data exchange (ASCII command support), the RNBD451 module supports a debug UART (RXD/TXD) to implement the Bluetooth virtual sniffing feature. The log from the device is collected from this debug UART interface, and is, then, fed to the packet analyzer tool. The debug UART operates in 921600 baud rate, and it is not configurable.