An ESP32-compatible controller that turns a "dumb" hot-water re-circulation pump into a "smart" one. The pump is turned on demand (e.g. someone calls for hot water by turning on a faucet), and turned ...

Control and monitor the state of Navien water heaters which are connected to the Navien cloud portal via a NaviLink or NaviLink Lite control system. Preheat Pump Output Time (P.12) Recirc Interval ...