Who else is old enough to remember when X10 was the state of the art in home automation?
I found this bag full of X10 modules at a garage sale and decided I needed to learn more about this old system

Wikipedia has a good article on the details of the system:
https://pileofstuff.ca/r/t7cqk

And, surprisingly, these are still on the market, even even 40 years after they made their debut:

https://www.homecontrols.com/home-aut...

https://www.x10.com/collections/all


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This isn't the only way to do it.
It's probably not the best way to do it.
But it's how I did it.