Our washing machine offers various programs between 30 minutes and 2 hours and 40 minutes.
Yes, it's not hard to set an alarm, except the timing on the washing machine is unreliable (I've lost count of how many times I've set an alarn with a few minutes extra and still had to wait longer.) It would just be nice to have a little notification - making that chore 1% pleasanter. :)
My worry would be that you'd have to do some diagnostics on the audio to determine the actual sound. The loudest noise my washer makes is the spin/rinse cycle, which is right before the sound it makes when it's done. You can't just key off of "loud noise" and I don't know how hard setting up to listen to specific frequencies for alerting is.
> You can't just key off of "loud noise" and I don't know how hard setting up to listen to specific frequencies for alerting is.
Fast fourier transform on the audio would give you volume for each frequency range. That probably requires some DIY hardware & programming.
But a power metering plug would be a cheap off-the-shelf solution. Find the ones pre-flashed with ESPhome for ~$15-20, find thresholds for ON/OFF with a bit of trial and error, and you're done.
Even easier than that: Amazon's Echo devices can be set up to detect beeps.
I have one in my kitchen, near the laundry room, and one in my home office. When things beep in that area, the one in the office says "Beep, beep." (I could have it do other stuff, but this was simple.)
It works for laundry. And the dishwasher. And the Instant Pot. And any other beepin' thing. It's just a remote beep detector.
(And if it detects beeping for 2 or more minutes, it notifies my phone, since that presumably means that my house is on fire.)
