The RAK4631 Arduino EU868 is a WisBlock Core module combining a Nordic nRF52840 microcontroller, Semtech SX1262 LoRa transceiver and Bluetooth Low Energy 5.0 for building custom wireless IoT devices.

Program it using Arduino IDE or PlatformIO to create LoRaWAN sensor nodes, LoRa point-to-point systems and BLE applications. Its 64MHz Arm Cortex-M4F processor, 1MB flash and 256KB RAM provide the processing and memory needed for sensor readings, application logic and wireless communication.

The RAK4631 plugs into a compatible WisBlock Base Board, which supplies power, programming access and connections for additional modules. Add temperature and humidity sensing, GNSS positioning, motion detection, industrial interfaces or a display to build a device around your requirements.

Low-power operation makes it useful for battery-powered and solar-assisted deployments, with power and charging options provided by the selected base board.

A WisBlock Base Board is required and is sold separately - see USED WITH section. LoRa and BLE PCB antennas are included.

Please contact us if you need help selecting the parts for your build.

KEY FEATURES

Arduino-Version WisBlock Core
EU868 LoRaWAN Connectivity
LoRa Point-to-Point Support
Bluetooth Low Energy 5.0
Nordic nRF52840 Microcontroller
64MHz Arm Cortex-M4F Processor
1MB Flash & 256KB RAM
Semtech SX1262 LoRa Transceiver
TCXO for Stable LoRa Operation
Arduino IDE & PlatformIO Support
UART, I²C, SPI, ADC, USB & GPIO Interfaces
Low-Power Operation
Modular Sensor & IO Expansion
LoRa & BLE PCB Antennas Included
Suitable for LoRa Mesh Networking - Compatible Firmware Required

IDEAL FOR

Custom LoRaWAN sensor nodes
Environmental monitoring
Smart agriculture and greenhouse monitoring
Building monitoring and automation
GNSS and asset-tracking projects
Industrial sensor integration
Battery-powered remote devices
Solar-assisted IoT installations
LoRa point-to-point communication
Meshing/networking projects
Prototyping, education and product development

WisBlock RAK4631 Arduino EU868 LoRaWAN Module – nRF52840 + SX1262

Name: WisBlock RAK4631 Arduino EU868 LoRaWAN Module – nRF52840 + SX1262
Brand: RAKwireless
SKU: 115000
Price: 13.8 GBP
Availability: InStock

SKU: 115000

£13.80

Excluding Sales Tax

Quantity

Configuration

Manufacturer: RAKwireless

Model: RAK4631

Product Type: WisBlock Core module

Version: Arduino

Listing Frequency Plan: EU868

Base Board: Compatible WisBlock Base Board require

Processor & Memory

Microcontroller: Nordic nRF52840

Wireless Connectivity

LoRa Transceiver: Semtech SX1262

LoRaWAN: 1.0.2, Class A and Class C using the manufacturer’s documented Arduino stack

LoRa Point-to-Point: Supported

Bluetooth: Bluetooth Low Energy 5.0

LoRa Oscillator: Temperature-compensated crystal oscillator - TCXO

Maximum LoRa Transmit Capability: Up to +22dBm; permitted settings depend on the regional frequency plan

Antenna Connections: Separate MHF-1 connectors for LoRa and BLE

Development & Interfaces

Development Environments: Arduino IDE and PlatformIO

Interfaces: UART, I²C, SPI, ADC, USB and GPIO

Programming & USB Access: Via a compatible WisBlock Base Board

Debug Interface: SWD

Expansion: Compatible WisBlock sensor and IO modules, subject to base-board slots and interface requirements

Power & Physical

Nominal Module Supply: 3.3V, provided through the base board

Manufacturer-Quoted Sleep Current: 2µA with LoRa and Bluetooth asleep

Operating Temperature: −40°C to +85°C

Board Dimensions: 20 × 30mm

Processor: 32-bit Arm Cortex-M4F

Clock Speed: 64MHz

Flash: 1MB

RAM: 256KB

Compliance

Manufacturer-Listed Radio Approvals: CE, FCC, ISED, KC and RCM - applicability depends on regional variant

EU Radio Assessment: EU Type Examination Certificate B2011135 for RAK4630 / RAK4631; see certificate and appendix for assessed configuration.

Environmental Documentation: REACH and RoHS

Certification Reference: Documents may identify the underlying RAK4630 radio module
Start with a Base Board - Required

RAK19007 WisBlock Base Board - 2nd Generation – versatile starting point

RAK19003 WisBlock Mini Base Board - compact builds

RAK19001 WisBlock Dual IO Base Board - larger builds with two IO slots

View all WisBlock Base Boards →

Add Sensing & Location

RAK1901 Temperature & Humidity Sensor

RAK1906 Environmental Sensor

RAK1904 3-Axis Acceleration Sensor

RAK12500 GNSS GPS Location Module

Browse WisBlock Modules →

Connect External Equipment

RAK5802 WisBlock RS485 Module

RAK13003 WisBlock IO Expansion Module

RAK1921 WisBlock OLED Display

Check base-board slots, interfaces and firmware requirements when combining modules.

Antenna Cables & Adapters

LoRa and BLE antennas are included. External antennas need an MHF-1 cable with a matching antenna connector:

MHF-1 to N-Type Female – 250mm

MHF-1 to RP-SMA Female – 65mm

MHF-1 to RP-SMA Female – 220mm

📍 COMMON ORDERING MISTAKE – CHOOSE MHF-1, NOT MHF-4

Power Your Build

Battery Connector Cable - Pack of 5

5V Solar Panel - 80 × 45mm

Choose a compatible battery and charging arrangement for your base board. 📍 Check battery connector polarity before connecting.

House Your Device

Unify Enclosure IP67 - 150 × 100 × 45mm with Bespoke Mounting Plate - grey and white versions

Unify Enclosure – 100 × 75 × 38mm with Bespoke Mounting Plate - grey with solar and white versions

View the full range of Unify Enclosures →

Check space for your assembly, battery, antennas and cable connections before choosing an enclosure.

Connect & Manage Your Deployment

LoRaWAN Gateways

NETGubbins - network services

IoTGubbins - hosted dashboards and device management

DevGubbins - engineering support for custom devices

Arduino or RUI3?

Both versions use the same nRF52840 and SX1262 hardware. The difference is the firmware and development environment.

Choose this RAK4631 Arduino version if you want to write custom applications using Arduino IDE or PlatformIO, follow RAK’s Arduino examples, or use firmware that requires the Arduino bootloader.

Choose the RAK4631-R RUI3 version if you want to configure and control the module using AT commands, including from another controller, or develop applications using RAK’s RUI3 APIs with integrated radio and power-management functions.

Conversion between versions is possible, but involves changing the firmware and bootloader. Buying the version your project needs is the simplest starting point.

Unsure Whether to Choose 433MHz or 868MHz?

For most UK LoRaWAN projects, choose this EU868 version and a compatible EU868 gateway.

For LoRa point-to-point or mesh networking, choose the frequency supported by your intended network and firmware. Devices communicating together need matching frequency settings and suitable antennas.

If your project specifically requires 433MHz, see our RAK4631 Arduino EU433 module.

Please contact us for help choosing versions, checking compatibility or putting together a complete parts list.
This listing is for the RAK4631 Arduino EU868 version.

A compatible WisBlock Base Board is required. The Core module does not provide a standalone USB socket, battery connector or battery charger.

The RAK4631 provides processing and wireless communication. Sensors, IO modules, base board, battery, solar panel and enclosure are purchased separately.

RAK4631 and RAK4631-R use the same hardware but different firmware environments. Choose this version for the Arduino BSP. Choose the RAK4631-R listing for RUI3 development and AT-command applications.

Mesh networking requires separately installed compatible firmware. This module is supplied as the Arduino version.

For UK LoRaWAN deployments, use the EU868 frequency plan. LoRaWAN operation requires access to a suitable gateway and network server.

Connect the appropriate antenna before transmitting with LoRa or BLE. The supplied 2.4GHz antenna is used for BLE; the RAK4631 does not provide Wi-Fi connectivity.

Antenna Cables & Adapters

LoRa and BLE PCB antennas are included. For an external antenna, choose a cable with an MHF-1 module-side connector and the correct connector at the antenna end.

📍 COMMON ORDERING MISTAKE – MHF-1, NOT MHF-4

The RAK4631 uses MHF-1 antenna connectors. Our MHF-4 to N-Type cable does not fit this module. Check that your chosen cable specifies MHF-1.

Please contact us if you need help choosing an antenna or cable.

The quoted 2µA sleep current applies to the module under the manufacturer’s stated conditions, rather than a complete assembled device. Total consumption depends on the base board, attached modules and firmware.

Module combinations must be checked for slot availability, shared interfaces, power requirements and enclosure fit
1 × RAK4631 Arduino EU868 WisBlock Core Module

1 × LoRa PCB Antenna with MHF-1 Connector

1 × 2.4GHz BLE PCB Antenna with MHF-1 Connector
RAK4631 Quick Start Guide

RAK4631 Datasheet

WisBlock Quick Start Guide

WisBlock Source Code & Examples

Arduino IDE Board Support Package Installation

PlatformIO Board Support Package Installation

RAK4631 Bootloader Files & Source Code

RAK4631 3D Model

Certification & Compliance Documents

CE Certificate & Appendix (ZIP)

FCC Certification Documents (ZIP)

ISED Certification

KC Certification

RCM Documentation

REACH Test Report

RoHS Test Report

Documents cover different regional configurations. Check each document’s model, frequency and assessment scope for your intended application.
Stock is held by M2MGubbins in the UK.

Orders placed before 2pm Monday–Friday are normally dispatched the same day, and we can often dispatch later orders the same day where possible.

We endeavour to dispatch Saturday morning orders where possible, although Royal Mail collections take place early.

Available UK delivery services include:

Royal Mail Special Delivery Guaranteed by 1pm

Royal Mail Tracked 24 Signed

Shipping is calculated at checkout.

EU Orders

Due to the EU Packaging and Packaging Waste Regulation (PPWR), M2MGubbins is currently unable to arrange delivery to EU destinations.

EU customers may still order where collection and onward delivery are arranged by the customer using their own courier account. Please contact us before ordering.