Voice-over-BLE and sensor fusion provided in one module

22nd August 2017
Posted By : Mick Elliott
Voice-over-BLE and sensor fusion provided in one module

The BlueCoin hearing and motion sensing platform from STMicroelectronics (ST) is an integrated Bluetooth development system that incorporates low-power, high-performance 9-axis inertial and environmental sensors and a cluster of four digital MEMS microphones that are coupled with a powerful STM32F4 microprocessor. It is in stock at Mouser Electronics.

The sensing reference platform is compatible with STM32 Open Development Environment (ODE) and ST’s Open Software Expansion Libraries.

The ODE function pack for ST’s MEMS microphones features advanced audio processing and audio output. STM32Cube expansion pack software allows voice transmission over a Bluetooth low energy connection, making it ideal for audio entertainment, voice-controlled TV remotes, and wearable applications.

The board can act as server and client simultaneously and can connect to any Internet of Things (IoT) or wireless sensor network.

The ODE function pack uses sound source localisation, beamforming, and acoustic echo cancellation to improve sound quality.

Additional applications include PC control software compatibility to configure optimisations and beam direction.

The BlueCoin offers sensor fusion through integrated inertial modules, a nano pressure sensor, and an array of four MEMS microphones with a low-power ARM-based STM32 F4 series microcontroller.

An ST BlueNRG-MS network processor provides the Bluetooth low energy connectivity, while an STBC03 lithium-ion battery charger IC provides power management on the board.  

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