Microchip Technology RN4020-V/RM123 Bluetooth 4.1 Low Energy Module

Name: Microchip Technology RN4020-V/RM123 Bluetooth 4.1 Low Energy Module
Brand: Microchip Technology
SKU: IOWC-0140
Price: 1429.00 INR
Availability: OutOfStock

₹1,429.00 (Inclusive of all taxes)

Out of Stock

The Microchip Technology RN4020-V/RM123 is a fully-certified Bluetooth Low Energy 4.1 module featuring an integrated BLE stack, UART command interface, and 7dBm transmit power for reliable wireless connectivity up to 100m, ideal for IoT devices, wearables, and sensor nodes.

Features

Certified Bluetooth Low Energy 4.1 module with integrated stack for simplified firmware development.
ASCII command interface over UART for easy configuration and control via host MCU.
High 7dBm transmit power and -92.5dBm sensitivity for robust links up to 100m range.
Ultra-low power modes and 1.8-3.6V supply for extended battery life in portable applications.
On-board 64KB serial flash, GPIO, ADC, and support for custom GATT services and over-the-air updates.

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Description

The Microchip Technology RN4020-V/RM123 is a compact, fully-certified Bluetooth Low Energy 4.1 module designed for embedded wireless applications. It integrates a complete BLE protocol stack, allowing developers to implement robust wireless connectivity using simple ASCII commands sent over a UART interface, significantly reducing firmware complexity and time-to-market.

Engineered for performance and efficiency, the module delivers a +7dBm transmit power coupled with a -92.5dBm receiver sensitivity, ensuring a reliable communication link with a line-of-sight range exceeding 100 meters. Its low-power architecture supports multiple sleep modes, making it suitable for battery-operated IoT endpoints, wearable devices, and remote sensor nodes that require years of operation on a single charge.

Key Features

Fully-certified Bluetooth Low Energy (BLE) 4.1 module with on-board embedded stack.
Simple ASCII command interface over UART for easy host processor integration and control.
Supports GAP, GATT, SM, L2CAP protocols and integrated public profiles for standard BLE operations.
Enables creation of custom services and data streaming via MLDP (Master Link Layer Data Protocol).
Field-upgradeable firmware via UART or Over-The-Air (OTA) for remote maintenance.
Standalone scripting capability for analog/digital data collection without an external MCU.
Integrated 64KB internal serial flash for data logging and application code storage.
Features secure AES128 encryption for protected data transmission and device pairing.

Applications

IoT sensor nodes for environmental monitoring (temperature, humidity, pressure).
Wearable health and fitness trackers, smartwatches, and medical devices.
Smart home automation peripherals like wireless switches, locks, and lighting controls.
Asset tracking beacons and proximity detection systems.
Industrial wireless data acquisition and remote control units.

Technical Specifications

Bluetooth Version	4.1 Low Energy (BLE)
Data Rate	1 Mbps
RF Transmit Power	7 dBm
Receiver Sensitivity	-92.5 dBm
Operating Voltage	1.8 V - 3.6 V DC
Operating Temperature	-40°C to +85°C
Host Interface	UART (ASCII Commands)
Additional Interfaces	GPIO, ADC
On-board Memory	64KB Serial Flash
Security	AES128 Encryption

Frequently Asked Questions

How do I communicate with the RN4020 module from my microcontroller?

The RN4020 uses a simple ASCII command interface over a UART serial connection. Connect the module's UART_TX and UART_RX pins to your host MCU's corresponding RX and TX pins. After power-up, you can send plain-text commands like 'SF,1' for factory reset or 'SR,00000001' to advertise as a peripheral. Configure the baud rate (default is often 115200) on both devices for reliable communication. The module will respond with status messages and data, enabling full control over BLE advertising, connections, and GATT services.

What is the procedure for updating the module's firmware over-the-air (OTA)?

To perform an OTA update, you first need to establish a BLE connection from a central device (like a smartphone or gateway) to the RN4020 running in peripheral mode. The module supports the Master Link Layer Data Protocol (MLDP) for data streaming, which can be used for firmware transfers. Using Microchip Technology's tools or a custom script, the new firmware image is sent via the BLE connection and written to the module's internal flash. Ensure a stable connection and adequate power during the process, as interruptions can brick the module. Post-update, a reboot activates the new firmware.

Can the RN4020 operate as a standalone device without an external microcontroller?

Yes, the RN4020 supports standalone operation through its built-in scripting engine. You can write and store scripts in its 64KB serial flash to autonomously manage GPIO pins, read analog values from the ADC, control power modes, and handle basic BLE advertising and data collection. This is ideal for simple sensor beacon applications. For complex logic or heavy data processing, pairing it with an external host MCU is recommended. The scripting commands are documented in Microchip Technology's RN4020 user guide and are executed via the same UART command interface.