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Amazon Alexa technology brought to simple connected objects

The X-CUBE-AVS software package from STMicroelectronics enables Amazon’s Alexa Voice Service (AVS) to run on STM32 microcontrollers, allowing simple connected objects to support advanced conversational user interfaces with Cloud-based intelligence like automatic speech recognition and natural-language understanding.

The X-CUBE-AVS contains ready-to-use libraries and open routines that accelerate porting the AVS Software Development Kit to the microcontroller. With application samples also included, STMicro explained it abstracts developers from the complex software layers needed to host AVS on an embedded device.

According to STMicro this is the first package to cater specifically for microcontrollers. AVS development usually targets more power-hungry and expensive microprocessors, but STMicro said its X-CUBE-AVS makes Alexa technology accessible to a wider spectrum of developers and projects.

The software is able to handle low-layer communication and connection to AVS servers and provides application-specific services as well as encapsulating the AVS protocol to ease application implementation.

Connection management should include a persistent-token mechanism for directly restoring connection losses without repeated user authentication. A software test harness should also be provided for endurance testing, which is designed to simulate events, such as network disconnection, to facilitate robustness testing and validation of the user application.

Bethan Grylls

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