RN4871-I/RM128 Communications & Networking Modules by Microchip Technology

Bluetooth Low-Energy Module

The RN4871 is a small form factor, Bluetooth Low Energy module measuring just 9 x 11.5 x 2.1 mm. This fully-integrated module is designed for easy implementation into a broad range of applications. It delivers up to 2.5x throughput improvement and more secure connections vs. Bluetooth 4.1 based products. Developers can easily interface to the device via a standard UART interface, available on most Microcontrollers and Processors. 

The RN4871 has a completely integrated Bluetooth software stack, and offers a shielded regulatory certified version with built-in antenna. Developers are freed from the complexities of Bluetooth Software and RF development and can simply utilize the RN4871 as a wireline replacement. Perfect for IoT (Internet of Things) applications, when interfaced to a BLE enabled smartphone or Bluetooth Internet Gateway, applications can be monitored, controlled and updated from anywhere in the world.

The Microchip Bluetooth Data (MBD) mobile app is available to speed up development for both Android and iOS.

Microchip's complimentary and confidential Wireless Check online design review service is available for customers who have selected our products for their application design-in*.

*The online design review service is subject to Microchip's Program Terms and Conditions and requires a myMicrochip account.

Firmware Release Summary, see Software Release Notes for details:

Firmware 1.41.0 (web release only) Adds additional UART configuration flexibility and addresses three known issues. Details are available in the release notes.

RN4871-I(V)/RM140 - (FW 1.40.0) Fixes bug with random private addressing which created IoP issue with select Android devices. Added feature to turn off advertising at power-on in order to easily configure module with the host MCU before advertising. Available in industrial temperature range (I) and varying (V) for easier transition from RN4871-V/RM118. 

RN4871-I/RM130 - (FW 1.30.0) Fixes bug with invalid Bluetooth address. Refer to Errata document for more information.

RN4871-I/RM128 - (FW 1.28.2) Introduces LE Secure Connections and Data Length Extension features among other bug fixes. Also improved the operating range to 85C.

RN4871-V/RM118 - (FW 1.18.3) Initial Release.

The RN4871 BLE module is now available on MPLAB® Code Configurator (MCC) - a free, graphical programming environment that generates seamless, easy-to-understand C code to be inserted into your project. Visit the MCC page for more information: https://www.microchip.com/mplab/mplab-code-configurator

Where to Buy

Prices starting from US$6.63

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Bluetooth 5 Certified
Easy to use ASCII command interface for communication with the host microcontroller
Module certified for use in USA, Canada, Brazil, Europe, Japan, Korea, Taiwan and China
Mobile Application supported in Microchip Bluetooth Data (MBD)
Latest Firmware Revision: 1.42
Supports LE Secure Connections levels 1-3
Supports up to 151 byte payloads with Data Length Extensions
Scripting features to allow for operation without a host microcontroller
White list for determining connections
MLDP compatibility with RN4020
Remote configuration capability
Antenna: Ceramic chip Antenna or external antenna connection


Bluetooth Classic-Data/SPP No
Bluetooth Classic-Audio No
Bluetooth Low-Energy Yes
On Board Antenna Yes
On Board Shield Yes
BT SIG Certified Yes
FCC Certified Yes
Unshielded Option Available Yes
Host Interface UART
ASCII Interface Yes
Audio Channels No
Analog Audio Out No
Digital Audio Out No
MIC-in 0
Line-in No
Security AES128
Temp Sensor No
Rx Sensitivity -90
Memory Type Flash
Tx Power +2 dBm
Pin Count 16
Package Type Surface mount module
Package Size Shield 9 x 11.5 mm, Unshield 6x8mm
Temp Range Min -40C
Temp Range Max +85C
Operation Voltage Min 1.9V
Operation Voltage Max 3.6V
Pins | Packaging 16 | MODULE
Temp Range -40C to +85C
Packing Media Tray (171)


Environmental Information

JEDEC Indicator e4
ROHS Compliant
China EFUP Compliant
Device Weight (g) 0.0
Shipping Weight (kg) 2.169591
Lead Count 16
Package Type MODULE
Package Width or Size 11.5x9x2.1mm
Soldering Composition NiAu

Alternative Descriptions

Bluetooth LE 5.0 Module | Micros
Bluetooth 4.2 Low Energy Module | Newark Electronics
Bluetooth Low Energy Module, Shielded, Antenna, ASCII Interface, 9x11.5mm | Microchip Technology
BLUETOOTH MODULE, V4.2, 2.402-2.48GHZ | element14
Bluetooth Low Energy Module 1.9V to 3.6V 10kbps 16-Pin SMD Module | Avnet America

Frequently Asked Questions

Where can I find additional details, specifications and documents for a RN4871-I/RM128?

Additional datasheets, footprints and schematics for RN4871-I/RM128 are listed on our Part Details page. You can also find images and similar parts to RN4871-I/RM128 on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for RN4871-I/RM128 on our Product Comparison page. Access via the 'View Pricing & Stock' button to view RN4871-I/RM128 price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does RN4871-I/RM128 fall under?

The RN4871-I/RM128 is listed under Wireless Modules & Adaptors > Communications & Networking Modules > Bluetooth Modules & Adaptors.

Can I view similar or alternative parts?

You can view similar parts to RN4871-I/RM128 when available in the Bluetooth Modules & Adaptors range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the RN4871-I/RM128 you can contact the distributor directly for product support, shipping queries etc.

Is the RN4871-I/RM128 RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Microchip Technology.

Which authorised distributors for RN4871-I/RM128 have stock available?

Authorised distributors including Micros, Newark Electronics, Microchip Technology, element14 and Farnell have stock available or on a lead time for RN4871-I/RM128.

How do I check stock and lead times for all distributors?

Stock availability and lead times will be displayed for RN4871-I/RM128 often in real-time on the comparison pages.

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