In example implementations, an apparatus is provided. The apparatus includes a connection interface, a local area network (LAN) interface, a wide area network (WAN) interface, and a processor. The connection interface is to connect to a printed circuit board (PCB) of a door controller. The LAN interface is to communicate with a plurality of door sensors, wherein each one of the plurality door sensors is to monitor operation of a respective door of a plurality of doors. The WAN interface is to communicate with a remote server of a service provider. The processor is communicatively coupled to the connection interface, the LAN interface, and the WAN interface. The processor is to receive door data from the plurality of door sensors via the LAN interface, transmit the door data to the remote server for analysis via the WAN interface, receive a correction action from the remote server over the WAN interface in response to the door data, and execute the corrective action on a door of the plurality of doors via the LAN interface.