The WisBlock RAK3401 BLE Core Module is built around the Nordic nRF52840 MCU, delivering reliable Bluetooth Low Energy connectivity for low-power IoT applications.
 
Designed as a BLE-focused alternative to the RAK4631, this module removes LoRa capability to reduce power consumption and system complexity, making it ideal for battery- and solar-powered deployments.
 
With its temperature-compensated crystal oscillator (TCXO), the RAK3401 provides stable timing for consistent wireless communication and sensor data handling. It supports a wide range of interfaces including UART, I2C, SPI, ADC, USB, and GPIO, enabling seamless integration with WisBlock sensor, power, and interface modules.
 
For applications requiring long-range communication, the RAK3401 can be paired with external LoRa transceiver modules such as the RAK13302, enabling hybrid BLE + LoRa architectures within the same modular system.
 
KEY FEATURES
 
nRF52840 MCU – ARM Cortex-M4F for efficient processing and low power operation
Bluetooth Low Energy (BLE) – reliable short-range wireless communication
TCXO stability – improved timing accuracy for consistent performance
Rich I/O interfaces – UART, I2C, SPI, ADC, USB, GPIO
WisBlock modular compatibility – plug-and-play expansion with sensors and interfaces
Low power design – ideal for battery and solar-powered deployments
 
IDEAL FOR
 
BLE IoT nodes – low-power wireless sensor deployments
Environmental monitoring – modular sensor-based systems
Industrial sensing – reliable short-range data collection
Smart agriculture – distributed BLE sensor networks
Rapid prototyping – scalable development using WisBlock ecosystem
Mesh networking architectures – BLE nodes paired with external LoRa modules