I used the
that I already had nearby for environmental monitoring. It was easy to add a relay
https://www.amazon.com/gp/product/B00E0NTPP4/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
to it and do exactly what you are looking for. 
If you go this route you get the bonus of all the sensors AND a Zigbee repeater. 
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