My garden has two kinds of days: the ones where I forget to water, and the ones where it rained all night and I water anyway. So I built an irrigation controller that lives inside Home Assistant. It's free and open source, and it can found from the HACS default list, so installing it is now "search, download, restart". The idea You already have the hardware: a valve, maybe a pump, maybe a rain gauge or a soil probe. ZoneFlow doesn't want you to buy anything new. You tell it wh...