Introduction

The BM78 and the RN4678 modules are fully certified, embedded 2.4 GHz Bluetooth^® Low Energy wireless module with Basic Rate (BR) and Enhanced Data Rate (EDR) features. The BM78 and the RN4678 modules include an on-board Bluetooth stack, power management subsystem, 2.4 GHz transceiver and Radio Frequency (RF) power amplifier. The users can embed Bluetooth functionality into any application using the BM78 and the RN4678 modules.

This application note describes the procedures and data formats used to conduct the Device Firmware Upgrade (DFU) using the external host MCU.