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HD-12 Rain Sensor connection ON-OFF State

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    RainMachine Nicholas

    Hi Dave,

    Usually there are 2 types of rain sensors: Normally Closed (most common) and Normally Open.

    Normally closed ones open the circuit when it's rain, so in RainMachine if you put those 2 wires in short it's the "normal" state (no rain), when you "un-short" them it will detect rain.

    Normally open ones are the similar but in reverse.

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