Patent ID: 9324203
Filing Date: 2016-04-26
CPC Classification: G07C

Claim Text:
1. A system to activate a door keypad, the system comprising: a keypad associated with a door lock in a door, the keypad comprising keypad buttons, the keypad having an active state allowing activation of the keypad buttons and an inactive state prohibiting activation of the keypad buttons; at least one sensor configured to provide sensor data comprising an identity of a requestor requesting entry through the door; a door lock controller in communication with the keypad and the at least one sensor, the door lock controller configured to receive the sensor data, locally determine whether the identity is from an authorized user, activate the keypad buttons when the identity is from the authorized user, and receive from the keypad an access code when the keypad is activated; and a local receiver comprising a first antenna, a second antenna, and a radio frequency (RF) receiver and configured to wake up from an inactive state upon receiving the access code from the door lock controller, transmit with the first antenna a first message encoded with the access code via a first RF signal having a first frequency for propagation through a mesh network to a remotely located hub device which is configured to determine whether the access code is an authorized code, and return to the inactive state after transmitting the access code; and the local receiver further configured to detect with the second antenna an electromagnetic field generated by a presence of a carrier signal that is added to a powerline waveform, the carrier signal comprising a second RF signal having a second frequency different than the first frequency, the presence of the carrier signal indicating that a second message encoded with a door lock command using the second frequency is modulated onto a powerline the local receiver further configured to wake up the RF receiver from the inactive state upon detecting the electromagnetic field in order to receive with the first antenna a third message comprising correct a door lock command to control a state of the door lock when the access code is the authorized code, the local receiver electrically disconnected from the powerline.