Nordic nRF52840 BLE Core Module

Product Summary

What is the RAK3401 WisBlock Core BLE Module?

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What is the RAK3401 WisBlock Core BLE Module? The WisBlock RAK3401 BLE module is built around the Nordic nRF52840 for applications that need Bluetooth Low Energy connectivity without built-in LoRa® or LoRaWAN® . As a BLE-focused alternative to the RAK4631 , it is well suited for battery- and solar-powered IoT devices where low power consumption and reliable wireless performance matter. Powered by the ARM Cortex-M4F-based nRF52840 , the RAK3401 balances processing capability with energy efficiency for remote sensors, BLE end nodes, and other embedded IoT designs . It also includes a temperature-controlled crystal oscillator for stable timing and provides interfaces such as UART, I2C, SPI, ADC, USB, and GPIO for easy integration with WisBlock modules, sensors, and expansion boards . For designs that need external LoRa capability, the RAK3401 can also be used with the RAK13302 1W transceiver module on the RAK19007 Base Board . Development is supported in Arduino IDE and PlatformIO for VS Code using our Arduino BSP, helping speed up prototyping and development. Notes: This module only supports Bluetooth Low Energy connectivity. If you need LoRa or LoRaWAN communication , please check our RAK4631 WisBlock Core module . It combines the nRF52840 MCU with a Semtech SX1262 transceiver module based on LoRa technology. Who Is the RAK3401 BLE Core Module Designed For? The RAK3401 BLE Core Module is designed for engineers, system integrators, and product teams building Bluetooth Low Energy IoT nodes . It suits developers who need a compact MCU for sensor data collection, local wireless communication, and low-power operation. The module fits projects that rely on modular hardware expansion through the WisBlock ecosystem and require predictable behavior in long-term deployments. It is also well-suited for teams that need a reusable hardware platform where sensor, power, and interface modules can be standardized across multiple BLE products using the WisBlock ecosystem . This makes

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• Last verified: 2026-06-01