Microchip RN4678-V/RM113 Bluetooth Dual-Mode Module: Datasheet and Application Overview

The Microchip RN4678-V/RM113 is a fully integrated Bluetooth Dual-Mode Module that supports both Bluetooth Classic (v2.1+EDR) and Bluetooth Low Energy (v4.2) protocols. This robust module is designed to simplify the implementation of wireless connectivity in a wide range of applications, from industrial IoT to consumer electronics. By combining RF, baseband, and protocol stack firmware into a single compact unit, it significantly reduces development time and complexity.

Housed in a surface-mount package, the module is built around a powerful ARM Cortex-M4F core with an integrated Bluetooth stack, offering ample processing power for user applications. It features a comprehensive set of peripherals, including UART, SPI, I2C, PWM, and ADC interfaces, providing designers with the flexibility to connect various sensors and peripherals directly. A key feature is its support for multiple roles: it can operate as a Master, Slave, or Simultaneous Master/Slave device, making it incredibly versatile for creating both centralized and distributed networks.

The RN4678 module is pre-certified for major regulatory standards (FCC, IC, CE, etc.), which drastically simplifies the often lengthy and expensive product certification process. Its command-driven interface via a simple UART allows for easy configuration and control using ASCII-based commands, enabling rapid prototyping and integration without deep expertise in Bluetooth protocols. Common profiles such as SPP (Serial Port Profile) for Classic Bluetooth and GATT (Generic Attribute Profile) for BLE are supported out-of-the-box, facilitating reliable data streaming and device management.

Application Overview

This dual-mode capability makes the RN4678 ideal for bridging legacy and modern wireless systems. In industrial settings, it can be used to upgrade existing serial-based equipment (via SPP) to wireless operation while also enabling new low-energy sensor nodes. In consumer health devices, such as glucose meters or heart rate monitors, it can transmit data to a smartphone app via BLE for low-power operation and simultaneously connect to a dedicated desktop diagnostic tool using Classic Bluetooth for high-throughput data transfer. Its robust design also suits audio streaming applications for headsets and speakers.

ICGOOODFIND: The Microchip RN4678-V/RM113 stands out as a highly integrated, certified, and flexible solution for developers seeking to add reliable dual-mode Bluetooth connectivity. Its command-based interface and powerful onboard processor significantly lower the barrier to entry, making it an excellent choice for accelerating time-to-market for a diverse set of wireless products.

Keywords: Bluetooth Dual-Mode, RN4678-V/RM113, Pre-certified Module, UART Interface, Simultaneous Master/Slave.