Door handle accessory, an apparatus and a system comprising the door handle accessory and the apparatus

An apparatus comprising:

• a first communication interface configured to provide wireless connectivity with at least one door handle accessory;
• a second communication interface configured to provide connectivity to a building system;
• and
• a controller configured to:
• obtain, via the first communication interface, a message comprising an identifier associated with a door handle accessory of the at least one door handle accessory;
• and
• determine a command associated with the building system based on the message;
• and
• transmit, via the second communication interface, the command to the building system to control at least one building entity.

A method comprising:

• obtaining, by a control unit, at least one measurement from at least one sensor comprised in a door handle accessory, the at least one measurement being indicative of an action applied via the door handle accessory;
• obtaining, by the control unit, an identifier associated with the door handle accessory from a memory comprised in the door handle accessory in response to obtaining the at least one measurement;
• and
• causing, by the control unit, transmission of a message with a transceiver comprised in the door handle accessory, the message comprising the identifier.

A method comprising:

• obtain, by a controller via a first communication interface, a message comprising an identifier associated with a door handle accessory of at least one door handle accessory;
• and
• determine, by the controller, a command associated with a building system based on the message;
• and
• transmit, by the controller via a second communication interface, a command to the building system to control at least one building entity.