We’ve seen several water flow measurement systems for home use, such as this neat ESP8266-based shower water monitor.

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.

ESP8266 WiFi Water Flow Sensor with LED/Relay Control for Water Valve. Modifed version of this Github https://github.com/McOrts/Water_flow_sensor_MQTT ...

IoT-Based-Water-Quality-Monitoring-ESP This Arduino-ESP8266 system tracks pH, TDS, flow rate, water level, and temperature using multiple sensors. Data is sent to ThingSpeak for real-time monitoring ...

This paper proposes and demonstrate an economical and easy to use arduino based controlled irrigation system. The designed system deals with various environmental factors such as moisture, temperature ...