Microchip RN4871U-V/RM118 Bluetooth Low Energy Module: Datasheet and Application Overview

The RN4871U-V/RM118 from Microchip Technology is a highly integrated, versatile Bluetooth Low Energy (BLE) module designed to streamline the implementation of wireless connectivity in a wide range of IoT and consumer applications. Built around a powerful and efficient microcontroller, this module combines the radio, stack, and profile support into a single, compact unit, significantly reducing development time and complexity.

A core strength of the RN4871U-V/RM118 lies in its comprehensive firmware support for standard GATT-based profiles. This allows the module to instantly emulate common devices like a Heart Rate Monitor, Proximity Reporter, or Blood Pressure Monitor without requiring additional host microcontroller programming. For custom applications, it supports Microchip's transparent UART service, enabling easy, serial-like communication between a central device (e.g., a smartphone) and a host microcontroller, effectively turning wired serial connections into wireless links.

The module is pre-certified for major regulatory regions (FCC, IC, CE, etc.), which drastically simplifies the often costly and time-consuming process of bringing a wireless product to market. Its ultra-low power consumption is optimized for battery-operated devices, supporting various power-saving modes to extend operational life. Furthermore, the RN4871U features a robust set of hardware interfaces, including UART, SPI, I2C, PWM, and ADC, providing the flexibility to connect to a vast array of sensors and peripherals.

Configuration and operation are simplified through an ASCII-based command interface, allowing developers to easily set parameters, manage connections, and control I/O pins. The module also supports over-the-air (OTA) firmware updates, a critical feature for deploying future enhancements and security patches to devices already in the field.

In application, the RN4871U-V/RM118 is ideal for:

Medical and Health Monitoring: Wearable fitness trackers, glucose meters, and patient monitors.

Home Automation and Consumer Electronics: Smart sensors, remote controls, and connected appliances.

Industrial IoT: Wireless sensor nodes for data acquisition, equipment monitoring, and asset tracking.

PC Peripherals: Wireless mice, keyboards, and presentation remotes.

ICGOODFIND: The Microchip RN4871U-V/RM118 stands out as a mature, feature-rich, and certification-simplified BLE module. Its integrated profiles and transparent UART mode make it an excellent choice for developers seeking to add robust, low-power wireless connectivity with minimal development overhead, accelerating time-to-market for a diverse set of IoT products.

Keywords: Bluetooth Low Energy (BLE), IoT Connectivity, Ultra-Low Power, Pre-Certified Module, UART Transparent Service.