What is a BACnet APDU? Key Takeaways : What is a BACnet APDU? BACnet APDU stands for Application Protocol Data Unit, the fundamental message structure used at the application layer of BACnet communication. It defines how information is packaged, sent, and interpreted between BACnet devices such as controllers, sensors, and gateways. The APDU operates above the NPDU (Network Protocol Data Unit), forming part of the BACnet message hierarchy. There are four main APDU types: Confirmed Request, Un...
