Audio trigger on hearing song

Hardware
1

So I have a washing machine that plays a little song when it is finished. It’s a very clear series of tones and the same every time. I was trying to find a way to use that song to trigger actions (in this case give me a mobile notification that my laundry is done). Is there a way to do that?

I figure there would be an ESPHome device with a microphone doing audio recognition. I haven’t been able to find something like that though, but I might be missing a keyword to find it.

I saw some options using current sensors. I just thought this might be a good option for other devices that are hard wired in (like a dishwasher).

I put this in uncategorized because I wasn’t sure where it fit in.

2

Hi, just an idea: I made the dumb washing machine smarter with a smart plug.
When the current drops, it sends a TTS + this adds the ability to control the start from HA anytime.

3

It wouldn’t be a LG, would it? I vaguely recall discussion about this a while back.

4

Yep. It’s a very clear tone. I didn’t spring for the model with wifi because why does an appliance need wifi.

5

To tell you when it’s done, or how long it’s left, or what cycle it’s in, what settings.
A lot actually

6

Do what Nick suggested. Instead of listening for sound, monitor power consumption for completion of thr washing cycle. There are already integrations available to do this for HomeAssistant and you may find the power sensor is cheaper than a microphone based audio sensor.

You could monitor the washing machine audio connector on the controller board via an electrically isolated GPIO pin, but that would involve a bit of reverse engineering and a lot of futzing around.