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Shelly Flood S Gen4 – Smart Water Leak Sensor with Matter, Wi-Fi & Zigbee Protect your home from leaks before they become costly water damage. Shelly Flood S Gen4 is a compact, battery-powered smart water leak sensor designed for reliable detection in kitchens, bathrooms, utility rooms and other leak-prone areas.
Its large-surface t
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Solid once the firmware is updated
Overall it's exactly what I want from a water sensor - The device works with multiple protocols and was easy to configure once I got the firmware updated. Out of the box it was an older version, I think 1.8.9. It kept turning off during provisioning or would power down Wi-Fi while navigating the UI to configure it. Once updated to 2.0 it's been solid in every way imaginable.
I love how I have it joined in to Home Assistant from multiple directions - The direct Shelly integration, Matter over Wi-Fi, Zigbee, and even MQTT. The flexibility is fantastic.
It'll be an easy five stars once I know they're shipping with newer firmware out of the box.
R
R. · August 29, 2026
Great product. Was a little difficult setting up the water detection pucks for monitoring remotely.
Some specific instructions would have been nice.
