Show HN: Olaf – Acoustic Fingerprinting on the ESP32 and in the Browser

ESP32 is a source of infinite frivolity. My latest project does exactly nothing, except when certain door is opened. Then it logs into Wifi and continues to do nothing. Except now my desktop computer can ping that address and inform me the bloody door is open.

I see a very zealous and illegal, albeit useful application: I could hide an ESP32 with a relay inside of a circuit breaker and install it in my neighbor's breaker box, cutting their power every time they start blasting obnoxious disco music at 3 AM.

I&#x27;m constantly impressed by the ESP32 and have dabbled in a few project ideas.<p>You could even use them to talk to other ESP32 devices (in other dresses!) using WiFi&#x2F;UDP, Bluetooth LE or Espressif&#x27;s own &#x27;ESP-Now&#x27; mesh networking (which recently blew my mind).<p>I&#x27;ve done a few RGB LED Matrix based ESP32 projects now. This project has given me a few ideas.<p>Thanks!

He should get in touch with Disney’s merchandising department and send them a prototype. Nothing would stop them from just copying the idea without compensation, but doesn’t seem like much downside to trying since he made it for fun for his daughter.

I am so happy for your daughter. Such great memories she will have of her father. Thanks for sharing, this gave me an idea...

How well would this work towards voice activated things, i.e. &quot;Hey Olaf, make it rain?&quot; which turns the sprinklers on.

What is the demo supposed to do when it positively recognizes the song?

Definitely didn&#x27;t just sing Let It Go :) Awesome stuff!

Very cool! What&#x27;s the license for Olaf?

Very cool project, thanks for sharing.

Amazing