Wireless door locking system

A method of using a wireless door locking system, the method comprising:

• searching for a property on a system web site;
• scheduling a property;
• unlocking a door lock in response to sending a code from a mobile computing device to the door lock;
• locking the door lock when the door is closed after a set amount of time for viewing has expired;
• and
• invalidating the code sent from the mobile computing device to the door lock, wherein a microcontroller of the door lock performs operations according to an algorithm to invalidate the used code and validate another code, and wherein a processor of a server performs functions in accordance with a software application operating on the server to invalidate the used code and then validate another code by performing operations according to an algorithm that corresponds to the algorithm operating on the microcontroller of the door lock.

A wireless door lock comprising:

• an inner assembly comprising a microcontroller, a power source, an actuator, and a manual knob;
• an outer assembly comprising a sensor electronically coupled to the microcontroller;
• and
• a locking device operatively coupled to the actuator, wherein:
• the microcontroller executes instruction provided in firmware stored on the microcontroller to send a signal to the actuator in response to the sensor communicating a received code to the microcontroller;
• the actuator is activated and unlocks the locking device in response to receiving a signal from the microcontroller;
• the microcontroller performs operations according to an algorithm to invalidate the used code and validate another code, and wherein a processor of a server performs functions in accordance with a software application operating on the server to invalidate the used code and then validate another code by performing operations according to an algorithm that corresponds to the algorithm operating on the microcontroller of the door lock;
• and
• the manual knob manually disengages the lock from the inner assembly.