Espressif’s Alexa SDK v1.0b1!

Kedar Sovani
Sep 25, 2018 · 2 min read

The Espressif’s Alexa SDK v1.0b1 is now available on github here:

This is a low-footprint C-based SDK that includes support for all of the following features:

  • Conversations (Calendar, Shopping, News, Todo, Info, Movies, Sports)
  • Music/Audio Services: Amazon Prime Music, Audible, Kindle, TuneIn and iHeartRadio
  • Alerts: Alarms, Timers, Reminders and Notifications

Supported Hardware

By default, the SDK supports ESP32-LyraT development boards.

The SDK is so structured that it should be easily possible to support other hardware configurations.

Getting Started

Instructions for building, flashing and using the firmware are available here:

Hands-Free Mode/Wake-Word Engine

The SDK also supports hands-free mode of operation. The example lyrat_alexa_sr/ is provided that demonstrates the use in a hands-free mode (activity triggered based on saying ‘Alexa’ instead of pushing a button).

As discussed in a previous article, Anatomy of a Voice-Integrated Device, multiple configurations are possible given the micro-controller, DSP and the wake-word engine. The example lyrat_alexa_sr/ demonstrates the scenario where the Alexa client as well as the WWE is running on ESP32.

Phone Apps

The SDK release also includes a phone app for Android for performing (a) network configuration of the development board and (b) Authentication with Amazon. The source code for this app is also available here: It can be easily modified to add your Alexa project’s ID and credentials. It can also be easily customized to the branding and look-and-feel of your products.

Production Ready

We offer a complete production-ready solution that includes all Alexa features, reference phone app implementations and hardware reference designs. If you are interested in building commercial products with this, please reach out to us.

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Kedar Sovani

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The ESP Journal

Unofficial Blog for Best Practices and Announcements about Espressif