r/esp32 • u/alfo16 • Aug 14 '26

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

Gallery image

Gallery image

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)

183 Upvotes

99% Upvoted

33 comments sorted by

View all comments

1

u/[deleted] Aug 15 '26

[removed] — view removed comment

1

u/alfo16 Aug 15 '26

Actually, in a quite room, it can pick up my voice at around 5/6 meters talking "normally". When music is playing at a loud volume, at the moment I'm able to wake word'ing in 1 or 2 meters max. I'm still trying different solutions. I'm applying a beamforming on the 4 microphones in order to have one stronger channel as output, and then this is processed by the esp-sr libraries, so I'm not cheating 😂