Electronic device and method of controlling electronic device

A server comprising:

• a communication unit;
• a processor;
• and
• a memory,
• wherein the memory includes instructions causing the processor to control the communication unit to receive first identification information for a door and first opening/closing state information of the door from the door, and control the communication unit to transmit the first identification information for the door and the first opening/closing state information of the door to at least one electronic device configured to receive a notification of a change in an opening/closing state of the door when the first identification information for the door and the first opening/closing state information of the door are received.

A door comprising:

• a first communication unit and a second communication unit;
• a sensor unit configured to sense a change in an opening/closing state of the door;
• a memory configured to store door identification information and door opening/closing state information of the door;
• and
• a processor,
• wherein the memory includes instructions causing the processor to control the first communication unit to transmit the door identification information and the door opening/closing state information to a server when the opening/closing state of the door is changed, and perform control to activate the second communication unit from a deactivated state according to the change in the opening/closing state of the door.