STMicroelectronics UM3355 Bluetooth Low Energy Expansion Board Based
Specifications
- Based on STM32WB05KN with preloaded network coprocessor firmware with UART interface
- Embedded MLPF-NRG-01D3 integrated impedance matching network with harmonics filter
- On-board PCB antenna
- SPI interface optional through dedicated firmware
- Compatible with STM32 Nucleo boards
- Scalable solution, capable of cascading multiple boards for larger systems
- Free comprehensive development firmware library and examples, compatible with the X-CUBE-WB05N expansion software package for STM32Cube
Product Usage Instructions
Typical Applications
The X-NUCLEO-WB05KN1 expansion board can be used for various applications such as:
- Point-to-point communication
- Sensor applications
- Home automation and lighting
- Direct test mode (DTM)
Introduction
The X-NUCLEO-WB05KN1 expansion board provides Bluetooth® Low Energy connectivity for developer applications and can be plugged into an STM32 Nucleo development board (for example NUCLEO-U575ZI-Q) through its ARDUINO® Uno V3 connectors. The expansion board features Bluetooth® v5.4 compliant and FCC‑certified STM32WB05KN. This SoC manages the complete Bluetooth® Low Energy stack and protocols on its Arm® Cortex®‑M0+ core and programmable flash memory. STM32WB05KN supports central and peripheral modes and increased transfer rates with data length extension (DLE). X-NUCLEO-WB05KN1 interfaces with the STM32 Nucleo microcontroller via UART (default) with and without hardware flow control. Full duplex SPI with an interrupt line is also available. The firmware loaded on the module defines the host interface and, to modify it, simply change the firmware without modifying the hardware.
Picture is not contractual.
Typical application
The X-NUCLEO-WB05KN1 expansion board can be used for the evaluation of the STM32WB05KN device in many applications, such as:
- Point‑to‑point communication
- Sensor application
- Home automation and lighting
- Direct test mode (DTM)
Features
- Based on STM32WB05KN with preloaded network coprocessor firmware with UART interface
- Bluetooth® v5.4 compliant
- Bluetooth® Low Energy data packet length extension
- Embedded MLPF-NRG-01D3 integrated impedance matching network with harmonics filter
- On-board PCB antenna
- SPI interface optional through dedicated firmware
- Compatible with STM32 Nucleo boards
- Equipped with ARDUINO® Uno V3 expansion connector
- Scalable solution, capable of cascading multiple boards for larger systems
- Free comprehensive development firmware library and examples, compatible with the X-CUBE-WB05N expansion software package for STM32Cube
Note: For information on Bluetooth®, refer to the www.bluetooth.com website
- Arm and Cortex are registered trademarks of Arm Limited (or its subsidiaries) in the US and/or elsewhere.
Ordering information
To order the X-NUCLEO-WB05KN1 expansion board, refer to Table 1. Additional information is available from the datasheet and reference manual of the target STM32.
Table 1. Ordering information
| Order code | Board references | Target STM32 |
| X-NUCLEO-WB05KN1 |
|
STM32WB05KNV6 |
- ARDUINO® interface board
- MCU RF board
Codification
The meaning of the codification is explained in Table 2.
Table 2. Codification explanation
| X-NUCLEO- XXYYZTN | Description | Example: X-NUCLEO-WB05KN1 |
| X-NUCLEO | STM32 Nucleo expansion boards | STM32 Nucleo expansion boards |
| XX | MCU series in STM32 32-bit Arm Cortex MCUs | STM32WB0 series |
| YY | MCU product line in the series | STM32WB05 product line |
|
Z |
STM32 package pin count:
|
32 pins |
| T | Target application | Network coprocessor |
| N | Sequential number | First generation of Bluetooth® Low Energy expansion board based on the STM32WB05KN for STM32 Nucleo boards |
Development environment
System requirements
- Multi‑OS support: Windows® 10, Linux® 64-bit, or macOS®
- USB Type-A or USB Type-C® to USB Type-C® cable
Note: macOS® is a trademark of Apple Inc., registered in the U.S. and other countries and regions. Linux® is a registered trademark of Linus Torvalds.
Windows is a trademark of the Microsoft group of companies.
Development toolchains
- IAR Systems® – IAR Embedded Workbench®(1)
- Keil® – MDK-ARM(1)
- STMicroelectronics – STM32CubeIDE
- On Windows® only.
Conventions
Table 3 provides the conventions used for the ON and OFF settings in the present document.
Table 3. ON/OFF convention
| Convention | Definition |
| Jumper JPx ON | Jumper fitted |
| Jumper JPx OFF | Jumper not fitted |
| Jumper JPx [1-2] | Jumper fitted between Pin 1 and Pin 2 |
| Solder bridge SBx ON | SBx connections closed by 0 Ω resistor |
| Solder bridge SBx OFF | SBx connections left open |
| Resistor Rx ON | Resistor soldered |
| Resistor Rx OFF | Resistor not soldered |
| Capacitor Cx ON | Capacitor soldered |
| Capacitor Cx OFF | Capacitor not soldered |
Safety recommendations
Targeted audience
This product targets users with at least basic electronics or embedded software development knowledge like engineers, technicians, or students.
This board is not a toy and is not suited for use by children.
Handling the board
This product contains a bare printed circuit board.
Like all products of this type, the user must pay attention to the following points:
- The connection pins on the board might be sharp. Be careful when handling the board to avoid hurting yourself
- This board contains static‑sensitive devices. To avoid damaging it, handle the board in an ESD‑proof environment.
- While powered, do not touch the electric connections on the board with your fingers or anything conductive. The board operates at voltage levels that are not dangerous, but components might be damaged when shorted.
- Do not put any liquid on the board and avoid operating the board close to water or at a high humidity level.
- Do not operate the board if dirty or dusty.
Hardware requirements
The X-NUCLEO-WB05KN1 expansion board is designed for use with any STM32 Nucleo development board equipped with an ARDUINO® Uno V3 connector. The expansion board must be plugged into the matching pins of the development board connector.
To complete the system setup, the user needs:
- A PC/laptop with Microsoft Windows 7® or above to install the software package (X-CUBE-WB05N)
- DTM project to be flashed in the STM32WB05KN device
- A USB Type-A to USB Mini-B cable to connect the STM32 Nucleo to the PC/laptop
- A 5‑pin connector programming wire connected to the SWD connector (CN3) of X-NUCLEO-WB05KN1 to program it using the STM32 Nucleo or an external ST-LINK
Board setup
- Connect X-NUCLEO-WB05KN1 to the STM32 Nucleo board as shown in Figure 2.
- Connect the STM32 Nucleo to the PC/laptop.
- Program the STM32 Nucleo with the corresponding firmware to use X-NUCLEO-WB05KN1 as a network coprocessor.
The evaluation kit is ready to use.
Hardware description and configuration
Interconnection details
The X-NUCLEO-WB05KN1 expansion board and the NUCLEO-U575ZI-Q development board connection details are listed in Table 4.
Table 4. X-NUCLEO-WB05KN1 and NUCLEO-U575ZI-Q connection details
- Default connected signals are in bold.
| Right connectors | ||||
| X-NUCLEO-WB05KN1signal(1) | NUCLEO-U575ZI-QMCU port(1) | Signal name | Pin number | X-NUCLEO connector |
| – | PB6 | D15 | 10 | CN3 Digital |
| – | PB7 | D14 | 9 | |
| – | – | AVDD | 8 | |
| GND | GND | GND | 7 | |
| PB3/SPI1_SCK | PA5/SPI_SCK | D13 | 6 | |
| PA8/SPI1_MISO | PA6/SPI_MISO | D12 | 5 | |
| PA11/SPI1_MOSI | PA7/SPI_MOSI | D11 | 4 | |
| PA10/SPI_NSS | PD14/SPI_NSS | D10 | 3 | |
| PB0/UART_RX | PD15 | D9 | 2 | |
| PA1/UART_TX | PF12 | D8 | 1 | |
| RSTN | PF13 | D7 | 8 | CN4 Digital |
| – | PE9 | D6 | 7 | |
| – | PE11 | D5 | 6 | |
| PA11/LED | PE14 | D4 | 5 | |
| – | PE13 | D3 | 4 | |
| PA1/UART_TX | PF15 | D2 | 3 | |
| PB0/UART_RX | PG7/UART_TX | D1 | 2 | |
| PA1/UART_TX | PG8/UART_RX | D0 | 1 |
SPI/UART connection options
UART interface options:
X-NUCLEO-WB05KN1 interfaces with the STM32 Nucleo microcontroller via UART (default) with and without hardware flow control.
Several UART connection options between the STM32 Nucleo board and the X-NUCLEO-WB05KN1 expansion board can be used, depending on the STM32 Nucleo used, in case of signal conflict occurs when using other expansion boards, or else. To know which UART signals to connect, first look at the STM32 Nucleo schematics.
SPI interface option
X-NUCLEO-WB05KN1 can also interface with the STM32 Nucleo microcontroller via full duplex SPI with an interrupt line. For SPI connection, refer to Table 4.
X-NUCLEO-WB05KN1 description
X-NUCLEO-WB05KN1 is designed around STM32WB05KN. X-NUCLEO-WB05KN1 includes two boards (one ARDUINO® interface board or shield board and one MCU RF board. The ARDUINO® interface board is called MB2160. It includes ARDUINO® Uno V3 expansion connectors, an SWD connector, a UART connector, one user LED, and connects to the MCU RF board via two 50‑pin connectors. The MCU RF board is called MB2032 and embeds the STM32WB05KN application processor.
Figure 3 and Figure 4 help users locate the components on X-NUCLEO-WB05KN1.
Figure 3. X-NUCLEO-WB05KN1 PCB top view
Power
X-NUCLEO-WB05KN1 is powered by 3V3 from the STM32 Nucleo board through the ARDUINO® Uno V3 expansion connector.
VDD supplies of the STM32WB05KN are directly connected to 3V3.
SWD connector
X-NUCLEO-WB05KN1 has an SWD connector (CN8) for debugging/programming STM32WB05KN. The table below describes the SWD header and what each pin does.
Table 5. Debugging/programming connector pinout (CN8)
| Pin | CN8 | Designation |
| 1 | 3V3 | VDD from application |
| 2 | SWCLK | Target SWD clock |
| 3 | GND | Ground |
| 4 | SWDIO | Target SWDIO data input/output |
| 5 | RSTN | RESET of target |
UART connector
It is possible to interface X-NUCLEO-WB05KN1 with the STM32 Nucleo microcontroller via a UART connector (CN7) with hardware flow control.
The table below describes the UART connector pinout.
Table 6. UART connector pinout (CN7)
| Pin | CN7 | Designation |
| 1 | T_UART_CTS | Target UART_CTS (clear to send) |
| 2 | T_UART_TX | Target UART_TX |
| 3 | T_UART_RX | Target UART_RX |
| 4 | T_UART_RTS | Target UART_RTS (request to send) |
| 5 | GND | Ground |
User LED
One general-purpose blue LED (LD1) is available for user applications. It is connected to pin 5 of CN4 of X-NUCLEO-WB05KN1 and it emits with a high level of the corresponding port of the host MCU connected to pin 5 of CN4.
X-NUCLEO-WB05KN1 product information
Product marking
The stickers located on the top or bottom side of all PCBs provide product information:
- First sticker: product order code and product identification, generally placed on the main board featuring the target device.
Example:
- Second sticker: board reference with revision and serial number, available on each PCB.
Example:
On the first sticker, the first line provides the product order code, and the second line the product identification.
On the second sticker, the first line has the following format: “MBxxxx-Variant-yzz”, where “MBxxxx” is the board reference, “Variant” (optional) identifies the mounting variant when several exist, “y” is the PCB revision, and “zz” is the assembly revision, for example B01. The second line shows the board serial number used for traceability. Parts marked as “ES” or “E” are not yet qualified and therefore not approved for use in production. ST is not responsible for any consequences resulting from such use. In no event will ST be liable for the customer using any of these engineering samples in production. ST’s Quality department must be contacted prior to any decision to use these engineering samples to run a qualification activity.
“ES” or “E” marking examples of location:
- On the targeted STM32 that is soldered on the board (for an illustration of STM32 marking, refer to the STM32 datasheet Package information paragraph at the www.st.com website).
- Next to the evaluation tool ordering part number that is stuck, or silk-screen printed on the board.
Some boards feature a specific STM32 device version, which allows the operation of any bundled commercial stack/library available. This STM32 device shows a “U” marking option at the end of the standard part number and is not available for sales. To use the same commercial stack in their applications, the developers might need to purchase a part number specific to this stack/library. The price of those part numbers includes the stack/library royalties.
X-NUCLEO-WB05KN1 product history
Table 7. Product history
| Order code | Product identification | Product details | Product change description | Product limitations |
| X-NUCLEO- WB05KN1 | XNWB05KN1$CZ1 | MCU: STM32WB05KNV6silicon revision “Z” | Initial revision | No limitation |
| MCU errata sheet: STM32WB05xN device errata (ES0633) | ||||
Boards:
|
Board revision history
Table 8. Board revision history
| Board reference | Board variant and revision | Board change description | Board limitations |
| MB2160(ARDUINO® interface board) | MB2160-WB05N-B01 | Initial revision | No limitation |
| MB2032(MCU RF board) | MB2032-WB05N-B01 | Initial revision | No limitation |
Federal Communications Commission (FCC) and ISED Canada Compliance Statements
FCC Compliance Statement
- Identification of products: X-NUCLEO-WB05KN1
- FCC ID: YCP-MB203202
Radio Frequency (RF) Exposure Compliance of Radio communication: To satisfy FCC RF Exposure requirements, a separation distance of 20cm or more should be maintained between the antenna of this device and persons during operation. To ensure compliance, operation at a closer distance than this is not recommended. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
Part 15.19
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
- This device may not cause harmful interference, and
- This device must accept any interference received, including interference that may cause undesired operation.
Part 15.21
Any changes or modifications to this equipment not expressly approved by STMicroelectronics may cause harmful interference and void the user’s authority to operate this equipment. Part 15.105 This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instruction, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on, the user is encouraged to try to correct interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
Responsible party (in the USA)
Francesco Doddo
STMicroelectronics, Inc.
200 Summit Drive | Suite 405 | Burlington, MA 01803
USA
- Telephone: +1 781-472-9634
ISED Compliance Statement
- Identification of products: X-NUCLEO-WB05KN1
- IC: 8976A-MB203202
Compliance Statement
Notice: This device complies with ISED Canada licence-exempt RSS standard(s).
Operation is subject to the following two conditions:
- This device may not cause interference, and
- This device must accept any interference, including interference that may cause undesired operation of the device.
RF exposure statement
This device complies with ISED radiation exposure limits set forth for general population. This device must be installed to provide a separation distance of at least 20cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter.
RED Compliance Statement
Simplified EC compliance statement
Hereby, STMicroelectronics declares that the radio equipment type “X-NUCLEO-WB05KN1” is in compliance with Directive 2014/53/EU.
Frequency range used in transmission and maximal radiated power in this range:
- Frequency range: 2400-2483.5 MHz (Bluetooth®)
- Maximal power: 8 mW e.i.r.p
Revision history
Table 9. Document revision history
| Date | Revision | Changes |
| 03-Jul-2024 | 1 | Initial release. |
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FAQ
- Q: What are the typical applications of the X-NUCLEO-WB05KN1 expansion board?
A: The typical applications include point-to-point communication, sensor applications, home automation, and lighting, as well as direct test mode (DTM). - Q: Is the X-NUCLEO-WB05KN1 compatible with STM32 Nucleo boards?
A: Yes, it is compatible with STM32 Nucleo boards.
Documents / Resources
 |
STMicroelectronics UM3355 Bluetooth Low Energy Expansion Board Based [pdf] User Manual MB203202, cYCP-MB203202, YCPMB203202, UM3355 Bluetooth Low Energy Expansion Board Based, UM3355, Bluetooth Low Energy Expansion Board Based, Low Energy Expansion Board Based, Expansion Board Based, Board Based |
