Systems and methods of security are provided, including at least one of a plurality of sensors to detect a location of at least one user, and generate detection data according to the detected location of the at least one user. A processor may be communicatively coupled to the at least one of the plurality of sensors to receive the detection data and to determine whether the at least one user is occupying a building according to the detection data. An alarm device, communicatively coupled to the processor, can be armed or disarmed by the processor according to the determination as to whether the at least one user is occupying the building.