20
Local Only Water Meter?
(lemmy.ml)
Home Assistant is open source home automation that puts local control and privacy first. Powered by a worldwide community of tinkerers and DIY enthusiasts. Perfect to run on a Raspberry Pi or a local server. Available for free at home-assistant.io
You can get used Yokogawa AXF water meters pretty cheap on eBay. They'll put out a 4-20mA signal and as long as you get the right version for your local power you can just wire a cord to it and plug it into the wall. Only measure flow and I think temperature though.