Details of the problem:
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?
Expert answer:
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.
