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In the second Access Control project step, we add the manual exit button. To simplify testing, a keypad key is used in lieu of an actual physical switch wired into your TPS' IO line.
The keypad and the corresponding On Keypad Pressed block have already been introduced in the Sprinkler Control 4 project. Pressing the F1 key (marked "EXIT" on the LCD) has the same effect as reading a valid ID card -- the door lock is activated for the lock_activation_duration number of seconds.