A $60 ESPHome build shuts your water off in seconds

The short answer Wire a few cheap resistive water probes to an ESP32 running ESPHome , then add a 3-wire motorized brass ball valve. You get local smart leak detection that shuts your main water supply within seconds of a puddle, with no cloud account, no $5/month fee, and no vendor lock-in. Parts cost under $60, against $500-$800 for products like Moen Flo or Phyn Plus . It plugs into Home…