I wanted to measure how much water is being used. So when the plumber was setting up the water connection I asked him to install a small turbine that emits pulses (about 400 per liter) . The idea being that I could count the pulses and then calculate overall consumption for both hot and cold water independently. Here’s a picture of one of the turbines.
I connected the turbine up to an ESP8266 board and flashed with the latest version of Tasmota.
Here it is mounted in the closet and receiving pulses for both hot and cold water.
And showing the final water consumption and pricing on a Home Assistant dashboard.
Should Anyone Ask 