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MAYBE THE RELAY HAS A DEFECT, TRY CHECKING CONTINUITY WITH A VOLTMETER FIRST IN BOTH THE NO AND NC .
YOU HAVE ONE 2 WIRE CABLE FOR POWER THE FAN , RIGHT? WELL CUT ONE OF THEM AND ATTACH ONE END TO THE COM AND THE OTHER END TO THE N.O. PORT OF THE RELAY, SO WHEN THE RELAY LATCHES YOUR FAN WILL TURN ON, MAKE THE SAME ARRANGEMENT FOR THE LIGHT.
FOR ACTIVATE / DEACTIVATE YOU CAN USE HC06 BT MODULE, AND MAKE IT WORK WITH ARDUDROID BT APP IN ANDROID. REALLY CHEAP AND EASY AND WORKS REAL FINE
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