Then wouldn't the natural choice be the Fibaro Flood Sensor. It does water sensing and temperature, Z-wave, and can be battery or wired powered. And it is for sale on the URC Dealer Portal, because it is a preferred integration partner.
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Raspberri Pi computer.
Just saw this article and wanted to pass it along since it includes WiFi water sensors.
https://www.engadget.com/2020/02/28/...r-home-damage/