Microchip RN4871-I/RM140 Bluetooth Low Energy Module: Datasheet and Application Overview

The Microchip RN4871-I/RM140 is a highly integrated, versatile Bluetooth Low Energy (BLE) module designed to provide seamless wireless connectivity for a wide range of Internet of Things (IoT) applications. Built around a powerful and efficient microcontroller, this module combines a fully certified BLE radio, stack, and profile configuration in a compact form factor, drastically reducing development time and complexity.

A core strength of the RN4871 module lies in its simple command-driven interface. Utilizing either ASCII or binary UART commands, developers can easily configure the module, manage connections, and transfer data without needing deep expertise in Bluetooth protocol intricacies. This interface is governed by an extensive command set, allowing for control over GAP and GATT parameters, security settings, and GPIO pins. The module supports various roles, including Central, Peripheral, Broadcaster, and Observer, making it adaptable for both initiating and accepting connections.

Security is a paramount concern in wireless communication, and the RN4871 addresses this with robust features. It supports LE Secure Connections with AES encryption, ensuring data integrity and confidentiality. The module is capable of operating in multiple security modes, from open connections to authenticated pairing with passkeys, providing developers with the flexibility to implement the appropriate level of security for their specific use case.

From an application perspective, the RN4871 is engineered for low-power operation, making it ideal for battery-powered devices. Its low sleep current and fast connection times enable designs that can operate for years on a single coin cell battery. Furthermore, the module is pre-certified for major regulatory regions (FCC, IC, CE, etc.), which eliminates the costly and time-consuming process of radio certification and accelerates time-to-market.

Typical applications are vast and include:

Consumer Health Devices: Heart rate monitors, glucose meters, and fitness trackers.

Smart Home and Industrial IoT (IIoT): Sensors for temperature, humidity, and proximity, as well as actuator control and asset tracking.

Remote Controls: For consumer electronics and industrial equipment.

Wireless Data Bridges: Enabling legacy wired devices to communicate with modern smart devices and gateways.

ICGOOODFIND: The Microchip RN4871-I/RM140 stands out as a comprehensive BLE solution that effectively balances ease of use, power efficiency, and robust performance. Its integrated nature and pre-certification status make it an excellent choice for developers seeking to rapidly deploy reliable and secure wireless connectivity in their IoT products.

Keywords: Bluetooth Low Energy, IoT Module, UART Interface, Pre-certified, Secure Connections.