Patent attributes
An access control device and a method for operating an access control device are provided. The access control device includes a detection sensor, a communication module, and a processor. The detection sensor is configured to detect a status event (e.g., a rotation of a handle, or an insertion or closure of a keybox). The communication module is in wireless communication with a mobile device. The communication module is configured to receive an advertising signal from the mobile device. The processor is in communication with at least one of the detection sensor and the communication module. The processor is configured to determine whether a distance between the mobile device and the access control device is greater than a threshold when the detection sensor detects the status event. The processor is configured to trigger a notification when the distance is greater than the threshold.
