Door latch assembly with wireless overlock

1 . A door latch assembly comprising:

a housing;

a bolt configured to the extend from the housing in a first direction and retract into the housing in a second direction;

a handle connected to the bolt;

a lockable, blocking member configured to prevent movement of the bolt;

a controller configured to place the door latch assembly into an overlock mode;

an actuator in communication with the controller, the actuator configured to prevent movement of the bolt in the overlock mode;

wherein the lockable, blocking member comprises:

a base plate having a base plate tab extending from the base plate;

an arm rotatably connected to the base plate, the arm including an arm tab extending from the arm;

a base plate tab hole in the base plate tab;

an arm tab hole in the arm tab;

wherein the base plate tab hole and the arm tab hole are configured to be aligned with upon rotation of the arm relative to the base plate;

a vibration sensor; wherein the controller is configured to place the door latch assembly into the overlock mode in response to the vibration sensor; wherein the controller is configured to send an attack message from the door latch assembly to a remote system in response to the sensed vibration.

2 . The door latch assembly of claim 1 , wherein:

the controller is configured to place the door latch assembly into the overlock mode in response to a message from a remote system.

3 . The door latch assembly of claim 1 , further comprising:

a position sensor in communication with the controller;

the position sensor configured to detect if the bolt is extended from the housing in the first direction or retracted into the housing in the second direction.

4 . The door latch assembly of claim 1 , further comprising:

a communication module configured to provide communication between the controller and a remote system.

5 . The door latch assembly of claim 4 , wherein the controller places the door latch assembly into the overlock mode in response to a message from the remote system.

6 . The door latch assembly of claim 1 , wherein the actuator comprises a motor.

7 . The door latch assembly of claim 1 , wherein the actuator comprises a stop.

8 . A method of operating a door latch assembly having:

a housing;

a bolt configured to the extend from the housing in a first direction and retract into the housing in a second direction;

a handle connected to the bolt;

a lockable, blocking member configured to prevent movement of the bolt;

a controller configured to place the door latch assembly into an overlock mode;

an actuator in communication with the controller, the actuator configured to prevent movement of the bolt in the overlock mode;

wherein the lockable, blocking member comprises:

a base plate having a base plate tab extending from the base plate;

an arm rotatably connected to the base plate, the arm including an arm tab extending from the arm;

a base plate tab hole in the base plate tab;

an arm tab hole in the arm tab;

wherein the base plate tab hole and the arm tab hole are configured to be aligned with upon rotation of the arm relative to the base plate;

the method comprising:

determining, by a remote server, that an overlock mode is required at the door latch assembly;

sending, from the remote server to the door latch assembly, a message to enter the overlock mode.

9 . The method of claim 8 , further comprising:

detecting at the door latch assembly that a bolt has been extended;

sending a closed message from the door latch assembly to the remote server.

10 . The method of claim 9 , further comprising:

storing the closed message in an audit record contained in memory of the door latch assembly.

11 . The method of claim 8 , further comprising:

detecting at the door latch assembly that a bolt has been retracted;

sending an open message from the door latch assembly to the remote server.

12 . The method of claim 11 , further comprising:

storing the open message in an audit record contained in memory of the door latch assembly.

13 . The method of claim 11 , further comprising:

sending the open message to a user.

14 . The method of claim 8 , further comprising:

periodically sending a status message from the door latch assembly to the remote server.

15 . The method of claim 14 , further comprising:

the remote server initiating maintenance of the door latch assembly in response to a missing status message.

16 . The method of claim 8 , further comprising:

sensing vibration at the door latch assembly;

sending an attack message from the door latch assembly to the remote server in response to the sensed vibration.

17 . The method of claim 8 , further comprising:

determining, at the remote server, that the overlock mode is not required at the door latch assembly;

providing a credential to the door latch assembly to end the overlock mode.

18 . The door latch assembly of claim 1 , wherein the actuator comprises a bistable solenoid and a stop, the bistable solenoid configured to move the stop into a first position to prevent movement of the bolt and a second position to allow movement of the bolt.