Basement Flood Sentinel — Know the Water Is Winning Before It Does

You'll walk away with: A battery-backed sentinel that Claude Code built — an ESP32-C3 measuring sump-pit water level with a sealed time-of-flight sensor and pump-run with a clamp on the power cord, running rise-rate and cycle-anomaly detection on the chip itself so it fires a local siren and escalates push → SMS → phone call over cellular even when the power and Wi-Fi are down, catching the two silent killers a float switch can't: a pump that runs but loses, and a pump that never runs at all.

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