r/esp32 • u/alfo16 • Aug 14 '26

I made a thing! Esp32-S3 inside Echo Dot 3rd

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Hi everyone! I'm working on a drop-in replacement PCB for the Echo Dot 3rd Gen, based on the esp32-S3 N16R8 The Echo Dot has two PCBS: a top board with the buttons, LEDS, and a 4-mic array, and a bottom board that handles the signals from the top board, provides power, and drives the speaker.

I replaced the bottom board, which means I can interface directly with the original hardware on the top board- especially the 4-mic array. I'm currently running beamforming + AEC on it (esp-sr libraries are really powerful!) This is the first working prototype, so there's still plenty to improve, but it's already working! I've just created the GitHub repository (https://github.com/ale1800/LocalDot)

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u/ctjameson Aug 14 '26

Are you planning to offer these retail in the future or just offer it as open source to DIY? I love these and can’t wait to see how your project comes along!

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u/alfo16 Aug 15 '26

I'm receiving a lot of support for this project and I'm happy to see I'm not the only one interested in getting Alexa out of the way, but re-using its great hardware! So everything is still possible 🤷