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Flaky Ecolink Flood Sensor
(self.homeassistant)
Home Assistant is open source home automation that puts local control and privacy first. Powered by a worldwide community of tinkerers and DIY enthusiasts. Perfect to run on a Raspberry Pi or a local server. Available for free at home-assistant.io
FYI for anyone interested, I'm using the flood sensor in conjunction with a smart outlet to control/monitor the sump pump in my crawl space. When it works, it works great!