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Smart devices are turning out to be a poor investment
(www.androidpolice.com)
This is a most excellent place for technology news and articles.
Some standard wall switches can also do multiple functions and may work for yours.
For example, I’m a fan of Innovelli switches where you can configure actions like double-clicks and more, to act as a “Zigbee button”
I can't replace the wall switches, as I'm renting a manufactured home, which has some really wackily wired light switches, likely to save money. If I owned a home I'd definitely install some smart switches and utilize those.