STMicroelectronics X-NUCLEO-WB05KN1

Overview

X-NUCLEO-WB05KN1 from STMicroelectronics is an Arduino Uno V3–compatible Bluetooth® Low Energy expansion board based on the STM32WB05KNV6 SoC, featuring Bluetooth v5.4 compliance, FCC certification, integrated MLPF-NRG-01D3 RF filter, and onboard PCB antenna. It operates as a network coprocessor interfacing with host Nucleo boards via UART (with optional hardware flow control) or full-duplex SPI with interrupt line.

For engineers reviewing the X-NUCLEO-WB05KN1 datasheet, X-NUCLEO-WB05KN1 pinout, X-NUCLEO-WB05KN1 application, or X-NUCLEO-WB05KN1 equivalent, key selection considerations include BLE v5.4 DLE support, preloaded network coprocessor firmware, ARDUINO® Uno V3 mechanical compatibility, cascading capability for multi-node systems, and integration with STM32Cube ecosystem via X-CUBE-WB05N.

Technical Context

The board implements a dedicated network coprocessor architecture where the STM32WB05KNV6 executes the complete BLE stack-including Link Layer, Host, and GAP/GATT-on its Arm Cortex-M0+ core, decoupling radio management from the host MCU. Its dual-core capability (M0+ for radio, optional M4 host interface) enables concurrent application and protocol processing.

RF performance is defined by the integrated MLPF-NRG-01D3 matching network and PCB antenna, delivering certified 2.4 GHz ISM band operation with up to +6 dBm output power and -96 dBm sensitivity at 1 Mbps. Interface flexibility includes UART (default), SPI with dedicated IRQ, and firmware-selectable host protocol mapping without hardware change.

Key Specifications

Availability

X-NUCLEO-WB05KN1 is available at Aetrix Electronics and suitable for Bluetooth LE sensor nodes, industrial wireless gateways, smart home hubs, and wearable development platforms requiring stable component supply and rapid prototyping capability.

Supply support for X-NUCLEO-WB05KN1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, analog ICs, power devices, and MEMS sensors for industrial, automotive, and consumer applications.

This board belongs to ST's X-NUCLEO expansion portfolio, engineered specifically to accelerate wireless connectivity development for STM32-based embedded systems using standardized, plug-and-play hardware interfaces.

FAQ

Does X-NUCLEO-WB05KN1 require external programming hardware?

No. The board is preloaded with network coprocessor firmware and communicates with the host Nucleo board via UART or SPI. Programming the STM32WB05KN itself is not required for standard BLE coprocessor operation; firmware updates are performed over the host interface using ST-provided tools and X-CUBE-WB05N libraries.

Can X-NUCLEO-WB05KN1 operate independently without a host Nucleo board?

No. It is an expansion board designed exclusively for use with STM32 Nucleo development boards (e.g., NUCLEO-U575ZI-Q) via ARDUINO® Uno V3 connectors. It lacks standalone power regulation, debug circuitry, or user I/O - all host-dependent functions are routed through the Nucleo baseboard.

What regulatory certifications does X-NUCLEO-WB05KN1 hold?

The board holds FCC certification for its integrated RF subsystem (STM32WB05KNV6 + MLPF-NRG-01D3 + PCB antenna). This allows OEMs to leverage its certified RF front-end in final products without retesting the radio section, provided mechanical and layout constraints of the reference design are maintained.

Is SPI interface functionality enabled by default?

No. UART is the default and factory-configured host interface. SPI mode requires loading alternate firmware onto the STM32WB05KN using ST's STM32CubeProgrammer and the X-CUBE-WB05N software package. The hardware supports SPI physically (dedicated pins and IRQ line), but firmware determines active interface protocol.