Research on BACnet building controller based on ARM9 and embedded Linux

People's ever-increasing demand on building environment has promoted the rapid development of intelligent buildings and building automation systems. With the application of BACnet/IP based building controllers, the building control center is connected via high-speed Ethernet with functional controllers on different floors and with different functions. Various functional modules of hardware circuits, which are designed on the ARM9 hardware platform, provide a stable operating environment for software and network by transplanting the embedded Linux system. This paper focuses on realization of data exchange between BACnet protocol stack and other BACnet devices through the protocol stack and the controller.