Smart home automation recipes and local sensing chains — HearthNodes

HearthNodes publishes working smart-home automation recipes: trigger, conditions, actions, hardware and the exact YAML. Filter by protocol, follow the topology, copy the recipe.

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Presence

Presence and geofence

Room-following light that tracks you along the corridor Three Thread presence sensors hand a single 20 % light level from zone to zone so the corridor is lit 2 m ahead of you and 4 m behind, without ever lighting the whole run at once. Measured handoff latency 600 ms. thread 600 ms 2026-09-02

Light

Light and daylight

Dark-room occupancy boost for a windowless utility room A windowless utility room has no daylight reference at all, so presence alone drives a two-stage scene: 40 % on entry, 85 % when you stay past 20 seconds, off 90 seconds after you leave. Entry-to-light latency is 400 ms on Thread. thread 400 ms 2026-10-29

Climate

Climate and air

Whole-flat CO₂ purge with a 9-minute cross-ventilation window Four CO₂ sensors across the flat trigger a 9-minute cross-ventilation on the two opposite windows when the mean reading passes 1 100 ppm, then re-check and repeat up to three times. Air changes measured at 4.1 ACH during the open phase. thread 540000 ms 2026-09-26

Water

Water and leak

Pipe-freeze guard: trickle the far tap and warn before the line drops to 2 °C A pipe-clamp temperature sensor on the most exposed run warns at 4 °C and opens a 0.4 L/min trickle at 2 °C, which is enough to keep a 15 mm copper line flowing through a -8 °C night without wasting more than 12 litres. thread 120000 ms 2026-10-20