Yes, you can control if from any phone, tablet or computer over the internet. My rain sensor is connected, and I have it set up to give me notification when the rain sensor is active (just to make sure it is working).
But more importantly, it uses the local weather data in making watering calculations, for both when to water and what duration. For example, since we didn't get the forecasted rain this past weekend, it has move up my next watering time to tonight.
Also, it logs each station as it waters, and provides an estimate of water usage. Not sure how accurate that will be, since I haven't had it long enough.
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