Wearable sensor unit reference design for fast time to market

STEVAL-WESU1 is a reference design developed and optimized to help designers implement the latest technologies in wearable and portable applications.

The small form factor of the hardware allows it to be enclosed in a watch strap, so the user can experience a real activity monitoring system and immediately begin appreciating the sensor data acquisition, as well as all of the embedded hardware and firmware features, also thanks to the ST WeSU app available free of charge from Apple Store™ and Google Play™ stores. The Apps are based on BlueST SDK, available on GitHub.

Advanced users can also further reduce the hardware form factor; please refer to STEVAL-WESU1 user manual for more details.

The STEVAL-WESU1 firmware package is built on the STM32Cube software technology so it can easily be augmented with further algorithms. It runs on STM32L151VEY6 and includes the drivers to manage three sensors (LSM6DS3, LIS3MDL and LPS25HB), the Bluetooth low energy network processor (BlueNRG-MS) and the battery management ICs (STC3115 and STNS01).

The firmware is freely available on www.st.com.

Key Features

  • Compact solution for wearable, motion sensing applications with a complete set of firmware examples
  • iOS and Android apps available
  • Main components:
    • STM32L151VEY6 – 32-bit ultra-low-power MCU
    • LSM6DS3 – 3D accelerometer + 3D gyroscope
    • LIS3MDL – 3-axis magnetometer
    • LPS25HB – MEMS pressure sensor
    • BlueNRG-MS – BLE network processor
    • BALF-NRG-01D3 - 50 Ω balun with integrated harmonic filter
    • STNS01 – Li-Ion linear battery charger
    • STC3115 – Fuel gauge IC
  • 100 mAh Li-Ion battery included, UN38.3 tested and certified
  • Micro USB connector for recharging
  • SWD connector for debugging and programming capability
  • Watch strap with plastic housing included
  • Fully tested and certified by FCC (FCC ID: S9N-WESU1) and IC (IC: 8976C-WESU1)
  • RoHS compliant

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Design

Technical Documentation

Product Specifications
Description Version Size
DB2854 DB2854: Wearable sensor unit reference design for fast time to market 1.0 291 KB
User Manuals
Description Version Size
UM2041 UM2041: How to use the STEVAL-WESU1 3.0 6 MB

Presentations & Training Material

Presentations
Description Version Size
STEVAL-WESU1 Getting Started 1.4 1 MB

Hardware Resources

Board Manufacturing Specifications
Description Version Size
STEVAL-WESU1 gerber files 1.0 204 KB
Bill of Materials
Description Version Size
STEVAL-WESU1 BOM 1.2 89 KB
Schematic Packs
Description Version Size
STEVAL-WESU1 schematic 2.0 314 KB

Legal

License Agreement
Description Version Size
501225 Battery Air Transportation Authorization 20161231 1 MB
501225 Battery CE Certification 1.0 48 KB
Evaluation products license agreement 1.0 125 KB

Tools and Software

Development Tools
Embedded Software
Hardware Development Tools
Evaluation Tool Software
MEMS and Sensors Software
Wireless Connectivity Software

Sample & Buy

Part Number Marketing Status Unit Price (US$) * Quantity Core Product ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STEVAL-WESU1 Active 48.95 1 STM32L151VEY6; BLUENRG-MSQTR; LPS25HB; LSM6DS3; LIS3MDL; STC3115; BALF-NRG-01D3 5A002A1A 5A992A ITALY MORE INFO Buy Direct Add to cart DISTRIBUTOR AVAILABILITY
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(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STEVAL-WESU1 ActiveCARDIndustrialEcopack2
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(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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