Lowest possible wifi camera with low power sleep?

James Newton wrote 12/25/2018 at 21:03 0 points

What's the absolute cheapest possible programmable wifi camera with low power sleep? I want to monitor my water use by taking remote pictures of the meter. It's in a place where anything of value will be stolen. Also, no place for wires (sidewalk) so battery only which means low power shutdown between pictures. I'm thinking ESP32 and camera. ~$12 e.g.

Anything cheaper?