Rachio Irrigation Controller Event registered.

Activate rain delay (days) after rain sensor deactivation.

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This recipe will get around bad weather station data, not reporting correct rainfall or a weather station that is not close enough to report accurate rainfall for your specific area. My rain sensor takes some time to activate and takes about 1/2 a day to dry out and deactivate so for me 2 days after deactivation works well. You may want to trigger on activation but if it rains for 3 days and Iro sees no rainfall or minimal rainfall it will water on day 4 since the 2 days has passed since rain...