elmicha

There are also some SAT receivers that run Linux, see e.g. https://www.opena.tv/app.php/atv_images

What happens if you put “police your_city” in your favorite search engine? I tried it with my current city and the village where I grew up, and both led me to the phone number in reasonable time.

echo is a program, but some shells like Bash and zsh also have a built-in echo. You can run type echo to verify that.

You could plug in a power meter with wifi and look what power is used.

You could use a babyphone or a camera (e.g. an old phone).

I’m not sure if an Alexa (Echo Dot or so) would react on the little tune of your washer, but it hears the standard annoying beeps of my washer.