We’ve seen several water flow measurement systems for home use, such as this neat ESP8266-based shower water monitor. ... Using a flow meter, he measures how much water leaves the tank.

To reduce power usage to a minimum, a flow switch was added in series with the flow meter, which only switches on the ESP8266 when water starts flowing.

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This is code for ESP8266 device which takes ON/OFF pulses from water meter as input and sends mqtt messages to home assistant to show water usage in energy dasboard. It covers entity creation in HA ...

Arduino-based smart irrigation using water flow sensor, soil moisture sensor, temperature sensor and ESP8266 WiFi module Abstract: Emergence of Controlled Environment Agriculture (CEA) ranging from ...