US Patent 9888346 Power management system for access control devices

Managing an access device associated with a controlled area at a place of hospitality is described. A location of a device of a user is determined. A controlled area that the user is authorized to access is determined. The location of the device of the user is monitored, and when the location of the device of the user is within a first area proximate to the controlled area, a first signal is transmitted to an access device associated with the controlled area. The first signal is used to manage an operation of the access device. An additional location of the device of the user may be determined. When the additional location of the device of the user is within a second area proximate to the controlled area, a second signal used to enable access to the controlled area is transmitted to the access device.