BACnet's a Data Communications Protocol for Building Automation and Control Networks. It's an ASHRAE, ANSI, and ISO standard protocol. Definition BACnet, an ASHRAE building automation and control networking protocol, was designed specifically to meet the communication needs 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 BACne… (More on Bacnet)