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ST launches sensor module and open source dev kit

Dec 8, 2016 — by Eric Brown — 1518 views

ST unveiled a Cortex-M4F based “SensorTile” sensor and BLE module plus an open source dev kit that adds audio, micro-USB, and an Arduino-like interface.

STMicroelectronics (ST) announced its SensorTile sensor module at its developer conference in October where it was one of the highlights of the show. Now the company has officially launched the 14 x 14mm SensorTile module along with an open source “STEVAL-STLKT01V1” development kit. The kit can be used for developing wearables, gaming accessories, smart-home, and other Internet of Things devices.

SensorTile (left) and STEVAL-STLKT01V1 kit
(click images to enlarge)

The SensorTile is built around ST’s 32-bit, CortexM4F STM32L4 MCU, and integrates ST sensors including a MEMS accelerometer, gyroscope, magnetometer, and pressure sensor, as well as a MEMS microphone. The module also has expansion interfaces and a Bluetooth Low Energy (BLE) radio.

Specific components of the SensorTile include:

  • STM32L476 MCU (80MHz Cortex-M4F)
  • BlueNRG-MS network processor with integrated 2.4GHz BLE radio
  • LSM6DSM 3D accelerometer + 3D gyroscope
  • LSM303AGR 3D magnetometer + 3D accelerometer
  • LPS22HB pressure sensor/barometer
  • MP34DT04 digital MEMS microphone
  • Expansion I/O — UART, SPI, SAI, I2C, DFSDM, USB OTG, ADC, and GPIOs

SensorTile (left) and block diagram
(click images to enlarge)

The STEVAL-STLKT01V1 kit extends the SensorTile with a cradle board for the module, as well as a larger expansion board that can be plugged into “form-factor prototypes and adds sensing and connectivity capabilities to new designs through a smart hub solution,” says ST. The kit ships with BlueMicrosystem2 software, which initializes the SensorTile’s sensors and BLE radio.

The cradle expansion board can “be simply plugged to a host board, and when powered it immediately starts streaming inertial, audio, and environmental data” to ST’s free BlueMS smartphone app. Specifically, it supports integration with an STM32 Nucleo development board via an “Arduino-like” interface.

STEVAL-STLKT01V1 cradle board, front and back (left) and cradle expansion board
(click images to enlarge)

The STEVAL-STLKT01V1 kit is equipped with features including:

  • SensorTile Cradle board with SensorTile module (solderable)
  • Cradle Expansion board:
    • STBC08PMR 800mA standalone linear Li-Ion battery charger and battery
    • HTS221 capacitive digital sensor for relative humidity and temperature
    • LDK120M-R 200mA low quiescent current very low noise LDO
    • STC3115 fuel gauge IC
    • USBLC6-2P6 very low capacitance ESD protection
    • 3.5mm audio jack
    • Micro-USB port for power supply and communication
    • MicroSD socket
    • SWD connector for programming and debugging
    • Programming cable
    • Plastic case

An API is available based on the STM32Cube Hardware Abstraction Layer and middleware components, including the STM32 Open Development Environment. The system is compatible with the Open Software eXpansion Libraries (Open.MEMS, Open.RF, and Open.Audio), as well as many third-party embedded sensing and voice-processing projects, says ST. Example programs are also available. The dev kit is supported with schematics, gerber files, and the like.

ST’s STEVAL-STLKT01V1 unboxing video

Further information

The SensorTile kit (STEVAL-STLKT01V1) is available now at $89, including the SensorTile. More information may be found in ST’s STEVAL-STLKT01V1 announcement and product page.

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