DIY Alexa: Create Your Own Voice Assistant with ESP32 & TensorFlow Lite!

We've been building towards this project in the previous set of videos. And we're now ready to build our very own DIY Alexa!

What are we building - 1:15
Wake Word Detection - 2:27
Command Recognition - 11:47
Digging into the code - 16:30
What's life all about Marvin? - 21:52

To detect the wake words we stream audio from either an I2S microphone or from the ADC. The wake word detector looks at a 1-second window of audio. The spectrogram of the audio is calculated and fed into a TensorFlow Lite model.

It works surprisingly well for such a small model, there are improvements that could be made with more training data.

Let me know how you get on in the comments!

Related Videos:

Audio Input

Audio Output

And TensorFlow Lite for machine learning

Components you could use:

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[clydealcott]

Thank you so much for this awesome and very educational video... I got my ESP32 recently...
It's time to roll along.!👍

[trevorwslee]

What an insightful project! I really hope to be able to adapt your idea (including some code snippets and likely the TensorFlow model) and come up with my own little ESP32 experiment.

[trueintellect]

I'm so glad I found your channel!! This is really cool. You've helped free me from my Raspberry Pi dependence.

[photopicker]

Very educational. Coming for a ESP32 background I found it very helpful to create a real target for the AI modeling tools. Great introduction.

[Trident]

Wow!! I didn't think the esp32 had the guts for any AI stuff! Great video!!

[jeffzor]

Obrigado pela oportunidade de aprendizado mestre!

[jorgemota]

Amazing, Fantastic thank you very much, really a great project

[tektronix]

wow, your alexa version, got me speechless.

[mariomedina]

Got it working! Now I need to learn how to change the activation word, and how to add multiple activation words that activate different code

[paulsimpson]

Really fascinating. Thank you so much for sharing.

[OnePunchHeizou]

this channel was really helpful to understand many edge ai related concepts, thank you @atomic14.

[ChrisHalden]

Amazing!!!! Will definitely give it a try. Thank you

[your.free.electrons]

Hey, this one's awesome :')

[gxbs]

voy a aplicarlo en dos dispositivos IOT que tengo en funcionamiento Excelente video

[gitaran]

absolutly amazing.. you do great things, .. you are smart.. its chalange me to make it one

[sambidpradhan]

This is awesome.. thinking to implement this on a custom dataset, and this model looks light weight as well.. can be implemented in real time I guess

[OMNI_INFINITY]

Thanks! Seems I should make a touchscreen voice AI app

[YigalBZ]

Great video and project. This is my next project. Thank you !

[naafff]

I thought your gonna be using a Raspberry pi. Speechless... Im gonna make one like u .

[devisnugroho]

what's kind of software that you use in 3:58, the wave and spectrogram comes realtime?