Hi - either direct from the puck, or, from a separate battery/relay (controlled by the puck) - i'd like to be able to power a latching relay so that I can have a remote control for my sprinkler.
My cell phone will come within bluetooth range of the puck, and, i will either engage or disengage the relay to turn the water on or off.
Is this an easy build? Can someone guide me?
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