The core functionality of the system default when there is a parking lot, a car into the very code, which is created inside the dormitory parties to press the code 3 times if it is not correct to have the warning signs.
The working principle of the parking lot when the car started to press code, the code generated by the parties within the halls. Press 3 if you can not be a warning sign.
The working principle of the park system began when the car in which a pin code is made to persons within the dormitory can press the code 3 times if incorrectly will alarm.