Debug the FCL-988M card integrated lock, add a four-key remote control to open the door, what are the functions of these four keys, and what needs are they used?
Hello! Thanks for using our company's products! The functions of these four keys are: A key: open the door, B key: arm, C key: disarm/unlock, D key: lock. A key: open the door; B key: set the alarm. C key: cancel the alarm. D key: after locking, the door cannot be opened even if you swipe your card.
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