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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 Storeâ„¢ and Google Playâ„¢ 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
Development Tools
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Picture Part number Manufacturer Description 
ST-LINK/V2 ST ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32 Part NumberST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32
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Embedded Software
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Picture Part number Manufacturer Description STSW-WESU1 ST Bluetooth low energy, MEMS sensors and battery management firmware for wearable applications 
ST_BLUE_DFU ST WeSU over-the-air device firmware upgrade ST_WESU ST STEVAL-WESU1 Android/iOS app Part NumberBluetooth low energy, MEMS sensors and battery management firmware for wearable applications
WeSU over-the-air device firmware upgrade
STEVAL-WESU1 Android/iOS app
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Picture Part number Manufacturer Description 
BlueMS ST This app has been replaced by STBLESensor 
BlueST-SDK ST Bluetooth Low Energy and Sensors Technology Software Development Kit (SDK) Part NumberThis app has been replaced by STBLESensor
Bluetooth Low Energy and Sensors Technology Software Development Kit (SDK)
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | WEEE Compliant | Material Declaration** |
|---|---|---|---|---|---|---|
| STEVAL-WESU1 |
Active
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CARD | Industrial | Ecopack2 | - |
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STEVAL-WESU1
Package:
CARDMaterial Declaration**:
(**) 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.
Sample & Buy
| Part Number | Order from Distributors | Order from ST | Core Product | Marketing Status | Supplier | ECCN (US) | ECCN (EU) | Country of Origin | Budgetary Price (US$)*/Qty | |
|---|---|---|---|---|---|---|---|---|---|---|
| STEVAL-WESU1 | 5 distributors | Buy now | STM32L151VEY6; BLUENRG-MSQTR; LPS25HB; LSM6DS3; LIS3MDL; STC3115; BALF-NRG-01D3 |
Active
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ST | 5A992C | 5A002A2 | ITALY | 50.0 / 1 |
(*) 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
