BACnet is a communications protocol for Building Automation
and Control networks. It is an ASHRAE, ANSI, and ISO standard
protocol. BACnet was designed to allow communication of building
automation and control systems for applications such as heating, ventilating,
and air-conditioning control, lighting control, access control, and fire
detection systems and their associated equipment. The BACnet protocol provides
mechanisms for computerized building automation devices to exchange
information, regardless of the particular building service they perform.