Abstract: A computer-implemented method for managing property includes receiving and storing in a database information from a rental reservation of a property, generating a first random PIN for a first user of the rental reservation through operation of a random generator engine, sending the first PIN to a first client device of the first user, generating a second random PIN for a second user associated with the property of the rental reservation through operation of the random generator engine, storing the first PIN and the second PIN in the controller of the door lock for the door of the property, sending the second PIN to a second client device of the second user, and operating the door lock to unlock the door in response to the controller of the door lock receiving entry of the second PIN or the first PIN from a first input device or a second input device.

Abstract: A computer-implemented method for managing property includes registering a phone number associated with a phone of a user, receiving a first message or call from a phone of the user, performing a query by an authenticator to determine if the phone number of the phone of the user is registered, sending one or more commands to the phone of the user for the user to select to operate the one or more devices if the phone number of the phone of the user is registered, receiving a command selected by the user to operate a selected device from the one or more commands sent to the phone of the user to operate the one or more devices, and operating the one or more devices upon executing the command selected by the user.