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STMicroelectronics STEVAL-WESU1
- Part No.:
- STEVAL-WESU1
- Manufacturer:
- STMicroelectronics
- Category:
- Sensor Evaluation Boards
- Package:
- Datasheet:
-
STEVAL-WESU1.pdf
- Description:
- WEARABLE SENSOR UNIT REF DESIGN
- Quantity:
- Payment:
- Shipping:
Inventory:108
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Product details
Overview
STEVAL-WESU1 from STMicroelectronics is a wearable sensor unit reference design integrating STM32L151VEY6 MCU, LSM6DS3 (3D accelerometer + 3D gyroscope), LIS3MDL (3-axis magnetometer), LPS25HB (MEMS pressure sensor), BlueNRG-MS BLE network processor, and STC3115 fuel gauge IC - all in a watch-strap form factor with 100 mAh Li-Ion battery, FCC/IC certified, and preloaded firmware for motion sensing.
For engineers reviewing the STEVAL-WESU1 datasheet, STEVAL-WESU1 pinout, STEVAL-WESU1 application, or STEVAL-WESU1 equivalent, this reference design delivers production-ready sensor fusion, BLE connectivity, battery management, and cross-platform iOS/Android app support via BlueST SDK - enabling rapid prototyping of activity monitors, smart wearables, and portable health devices.
Technical Context
The STEVAL-WESU1 implements a tightly integrated sensor hub architecture: the STM32L151VEY6 MCU runs firmware built on STM32Cube, managing concurrent I²C (100 kHz) and SPI (8 MHz) interfaces to LSM6DS3, LIS3MDL, and LPS25HB, while offloading BLE protocol stack execution to the BlueNRG-MS coprocessor.
Sensor data is fused onboard using calibrated drivers and exposed via BlueST protocol; power management includes STNS01 linear charger and STC3115 fuel gauge with coulomb counting, supporting micro-USB recharging and UN38.3-certified 100 mAh battery operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Form Factor | Watch-strap compatible mechanical housing with plastic enclosure and integrated strap. |
| Main MCU | STM32L151VEY6: 32-bit ARM Cortex-M3, 32 MHz max, ultra-low-power (0.34 µA standby), 512 KB Flash, 80 KB RAM. |
| Motion Sensors | LSM6DS3 (±2/4/8/16 g accel + ±125/245/500/1000/2000 dps gyro) + LIS3MDL (±50 Gauss mag) + LPS25HB (260–1260 hPa pressure). |
| Wireless Interface | BlueNRG-MS BLE 4.1 network processor with integrated RF front-end and BALF-NRG-01D3 balun + chip antenna. |
| Battery Management | STNS01 linear charger + STC3115 fuel gauge IC with coulomb counting, supporting 100 mAh Li-Ion cell (UN38.3 certified). |
| Regulatory Certifications | FCC ID S9N-WESU1 and IC 8976C-WESU1 certified; RoHS compliant. |
| Software Support | Firmware based on STM32Cube; iOS/Android apps via BlueST SDK (GitHub); SWD debug/programming interface included. |
Availability
STEVAL-WESU1 is available at Aetrix Electronics and suitable for wearable activity monitoring, portable health diagnostics, BLE-enabled fitness trackers, and smartwatch reference development requiring stable component supply and pre-validated regulatory compliance.
Supply support for STEVAL-WESU1 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, designing and manufacturing microcontrollers, sensors, power ICs, and wireless solutions for industrial, automotive, and consumer applications.
STEVAL-WESU1 belongs to ST's ST evaluation and reference design portfolio, created to accelerate time-to-market for sensor-fusion wearables by delivering fully tested hardware, production-grade firmware, and mobile app integration out-of-the-box.
FAQ
Is STEVAL-WESU1 a standalone production module or a development reference?
STEVAL-WESU1 is a fully tested reference design intended for evaluation and rapid prototyping - not a drop-in production module. It includes production-grade components, FCC/IC certification, and ready-to-deploy firmware, but requires customization for volume manufacturing, including mechanical redesign, firmware tailoring, and final regulatory retesting per end-product configuration.
What firmware and software tools are provided with STEVAL-WESU1?
The firmware package is built on STM32Cube and includes drivers for LSM6DS3, LIS3MDL, LPS25HB, BlueNRG-MS, STC3115, and STNS01. Free iOS and Android apps are available via Apple Store and Google Play, powered by the open-source BlueST SDK hosted on GitHub - enabling immediate sensor data visualization and BLE command control without custom app development.
Does STEVAL-WESU1 support over-the-air (OTA) firmware updates?
Yes - the onboard BlueNRG-MS BLE network processor supports OTA firmware updates via the ST WeSU mobile app. The STM32L151VEY6 firmware image is partitioned to allow safe dual-bank updates, and the BlueST protocol includes dedicated service characteristics for secure firmware download and verification before activation.
Can the hardware be miniaturized beyond the watch-strap form factor?
Yes - the STEVAL-WESU1 user manual documents layout optimization techniques and component-level alternatives (e.g., smaller passives, alternative antenna matching) to reduce PCB area. Advanced users may remove non-essential connectors (micro-USB, SWD) and integrate charging/fuel-gauge functions into the main MCU, enabling sub-20 mm × 20 mm implementations while retaining core sensor and BLE functionality.
STEVAL-WESU1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Sensor Type:
- Accelerometer, Gyroscope, Magnetometer, Pressure
- Sensing Range:
- -
- Interface:
- RF
- Sensitivity:
- -
- Voltage - Supply:
- -
- Embedded:
- Yes, MCU, 32-Bit
- Contents:
- Board(s), Cable(s), Accessories
- Utilized IC / Part:
- LIS3MDL, LPS25HB, LSM6DS3
STEVAL-WESU1 FAQ
1.How can I place an order for STEVAL-WESU1 through Aetrix?
Please submit a Request for Quotation (RFQ) for STEVAL-WESU1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STEVAL-WESU1 reliable?
The price and inventory of STEVAL-WESU1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STEVAL-WESU1 is usually 5 days.
3.What payment methods are accepted for STEVAL-WESU1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STEVAL-WESU1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STEVAL-WESU1?
STEVAL-WESU1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STEVAL-WESU1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STEVAL-WESU1?
For technical support, including STEVAL-WESU1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STEVAL-WESU1 requirements.
6.How does Aetrix verify that STEVAL-WESU1 is sourced from the original manufacturer or authorized distributors?
All STEVAL-WESU1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STEVAL-WESU1 meets industry standards.
7.What is the process for return or replacement of STEVAL-WESU1?
All STEVAL-WESU1 units undergo pre-shipment inspection (PSI). If there is an issue with STEVAL-WESU1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STEVAL-WESU1 part is unused and in its original packaging.
Return procedure for STEVAL-WESU1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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