containsmachine

Wearable sensor unit reference design accelerates time to market

STEVAL-WESU1

Overview

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.

Main 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

Design Files

Related Devices

Devices	Class	introduce	Datasheet
STM32L151VE		Ultra-low power Arm Cortex-M3 MCU with 512-KB Flash memory, 32 MHz CPU, MCD, USB and 2x op amps	Download
BlueNRG-MS		Bluetooth low energy network processor supporting Bluetooth 4.2 core protocol specification	Download
LPS25HB		Board Mount Pressure Sensor 26kPa to 126kPa Absolute 10-Pin HLGA Tray	Download
LIS3MDL	Analog mixed-signal IC;The signal circuit	3-axis MEMS magnetic field sensor, digital output, I2C/SPI, low power mode, high performance	Download
STC3115		Gas gauge IC with alarm output for handheld applications	Download
BALF-NRG-01D3	Passive components;Balance - imbalance (barron balun) transformer	Insertion loss (maximum): 1.1dB(typ) Frequency range: 2.4GHz ~ 2.5GHz Return loss (minimum): 20dB(typ) Phase difference: 7 deg Balanced port impedance: 50Ω Unbalanced port impedance: 50Ω RFTransformer4Term.	Download

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2024-11-15 07:19:40

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