Smart-watering for HA that works with OpenSprinkler *or any switches/valves* — soil-moisture + VPD modes, free/MIT
I cleaned up the smart-irrigation decision layer I run at home and made it fully
system-agnostic. The key idea: it never talks to the controller directly — it calls a
small adapter, so the same modes and logic run on OpenSprinkler, Rain Bird, Zigbee
valves, ESPHome relays, or plain switches. Swap the adapter, keep everything else.
The part I think is genuinely uncommon: none of it runs on a timer. Every decision
comes from your soil sensors and the weather, and it learns how fast your own soil
dries to predict the next watering — watering on a schedule is common, letting the
garden's actual condition decide is not.
What you get: a modes framework (Schedule / Sunrise / Interval / Smart / Off) with
guaranteed mutual exclusion, so two mechanisms can never double-water; a Smart mode
that waters on real soil-moisture demand *and learns how fast your soil dries* to
predict the next watering; sunrise watering that finishes right at sunrise and shifts
with the season; and a weather-based demand advisor that gives a plain "should I water
today, and how much?" readout based on how thirsty the weather is. It ships with a
plain-English explainer and a ready-made sensor, so no weather-science background is
needed.
The self-learning drying-rate Smart mode is the part I find most useful. All copy-in
YAML packages, MIT, built on scheduler-component + hass-opensprinkler. Test with the
water off first.