Multi-sensor module for IoT and wearable designs
9 November 2016
Analogue, Mixed Signal, LSI
STMicroelectronics’ 13,5 x 13,5 mm SensorTile is currently the smallest turnkey sensor board of its type, containing a MEMS accelerometer, gyroscope, magnetometer, pressure sensor and a MEMS microphone. With the onboard low-power STM32L4 microcontroller, it can be used as a sensing and connectivity hub for developing products such as wearables, gaming accessories, and smart-home or Internet-of-Things (IoT) devices.
SensorTile has a complete Bluetooth Low-Energy transceiver including a miniature single-chip balun onboard, as well as a broad set of system interfaces that support use as a sensor-fusion hub or as a platform for firmware development. It can be simply plugged to a host board, and when powered it immediately starts streaming inertial, audio and environmental data to ST’s BlueMS smartphone app that can be downloaded free of charge from popular app stores.
Software development is fast and easy thanks to a vast ecosystem of APIs based on the STM32Cube hardware abstraction layer and middleware components, including the STM32 Open Development Environment. The system is fully 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. Many example programs available in source code offer a starting point for evaluation and customisation, including software for position sensing, activity recognition and low-power voice communication.
The complete kit includes a cradle board, which carries the 13,5 x 13,5 mm SensorTile core system in standalone or hub mode and can be used as a reference design. This compact yet fully loaded board contains a humidity and temperature sensor, a micro-SD card socket, as well as a lithium-polymer battery (LiPo) charger. Its simple layout demonstrates how a complete wearable prototype customised with extra functionalities can be easily designed with the SensorTile core system. The pack also contains a LiPo rechargeable battery and a plastic case that provides a convenient housing for the cradle, SensorTile and battery combination.
Also part of the SensorTile kit is a cradle/expansion board with an analog audio output, a micro-USB connector, and an Arduino-like interface that can be plugged into any STM32 Nucleo board to expand developers’ options for system and software development. A programming cable is also included.
For more information contact EBV Electrolink, +27 (0)21 402 1940, [email protected], www.ebv.com
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