Door sensor hardware is provided that automatically senses the orientation of a door. The door sensor hardware includes electronic circuitry and sensor(s). The sensor(s) determine a current orientation of a door (open, closed, ajar), recent movement, door swing speed, and door acceleration. The door sensor hardware is in communication with at least remote device. The remote device includes a user display to facilitate calibration of the door sensor hardware by a user. The remote device also provides the user with the door orientation as determined by the door sensor hardware.