Build a cheap water usage sensor using ESPhome and a proximity sensor

ESP home water meter home assistant proximity

This article will provide you with a walkthrough on how you can build a water usage meter sensor that integrates with your Home Assistant for under 10 $/EURO, without the need of any soldering or coding skills.

This article will also cover the configuration that’s needed in Home Assistants to translate the ‘pulse’ to liters (or any other non-metric measurement) in Home Assistant. At the end you will have clear insights in how much water you are using per day, hour and week.

Why do you want to measure water usage of your home?

These days it’s all about insights. I measure pretty much all my utilities, including power and city heating. The last missing piece is water usage. Although water in the Netherlands is not really expensive I wanted to get more insights on how much water are we using and is there anyway to save some water. Unfortunately water delivery doesn’t come with a smart meter. There’s just a analog counter. So how do you measure the water usage and make this analog meter smart?

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