Dev tools · September 27, 2023
YDrip – An open source water meter that detects leaks
Hi HN, I'm developing an open-source water meter for Home Assistant and thought the HN community might be interested. I've been using some version of it after a few costly toilet leaks that my city meter missed. Recently, I decided to polish it up so others could use it. It might also function as a gas meter reader (https://youtu.be/9Dso4EBAoiE), but this is still experimental. The device runs on 3 AA batteries and utilizes an ESP32-S3. It works by measuring the spinning magnet inside the brass housing. It stays in deep sleep until it needs to transmit usage or leak…
YDrip – An open source water meter that detects leaks launched on September 27, 2023 with 20 votes, #1,380 of 4,228 launches that month and more than 75% of that year's launches. The site was not reachable when checked in September 2026.
In plain words
YDrip is an open-source water meter designed for Home Assistant that detects leaks by measuring the spinning magnet inside a standard meter's brass housing. The device, powered by an ESP32-S3 and three AA batteries, stays in deep sleep until transmitting usage or leak data. It targets homeowners seeking to catch water leaks their utility meter misses, offering both water meter and experimental gas meter reading capabilities. The hardware performs rotation counting and leak detection to minimize battery drain.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hi HN, I'm developing an open-source water meter for Home Assistant and thought the HN community might be interested. I've been using some version of it after a few costly toilet leaks that my city meter missed. Recently, I decided to polish it up so others could use it. It might also function as a gas meter reader…
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Source: Show HN post ↗ · launch text quoted in part
