Introduction

The RN4678 module is a fully certified, Bluetooth^® v5.0 compliant Low Energy (LE) Dual mode module with Basic Rate and Enhanced Data Rate (EDR) available for customers to easily add Dual mode Bluetooth wireless capability to their products. The module is recommended for any new design requiring classic Bluetooth protocol and for migrating from the RN4677 module. The RN4677 module is a dual mode Bluetooth module that provides a convenient method for cable replacement for smart phones or tablets for data transfer and control based on the classic Bluetooth as well as Bluetooth Low Energy protocol.

The primary purpose of this application note is to help the users and developers who are currently using the RN4677 module in their design to migrate to the RN4678 module. Feature Comparison between the RN4677 and the RN4678 Module provides a quick summary of the feature comparison between the RN4677 module and the RN4678 module. Hardware Connections provides an insight into the differences between the modules with respect to the hardware. ASCII Commands summarizes the ASCII command differences between the modules, and provides a quick summary of the Apple-related improvements.