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T HE O R Y OF O P E R A TI O N
End Device
While Coordinators and Routers can communicate with any device type, End Devices can communicate only through their parent device. Ideally the End Devices will be in sleep mode all the time. When they have data to send, they wake up, send the data and then go back to sleep. The Parent (Coordinator/Router) of an End Device should be mains powered to allow it to store data to be sent to the sleeping End Device.
•Multiple End Devices can be used
•No packet routing capabilities
•Can communicate with other devices in the Network through its Parent Device
•Reduced Function Device
•Mains or battery powered
•Power down modes are supported
•Unique network address dynamically asssigned by parent
C R E A T I N G A N E T W O R K
The IEEE 802.15.4 MAC provides support for two wireless network topologies: star and mesh. The management of these networks is performed by the ZigBee layer. All devices, regardless of topology, participate in the network using their unique
M e s h
The mesh topology allows any Full Function Device (Coordinator or Router) to communicate directly with any other device within its range and to have messages relayed to devices which are out of range via
Figure 1 shows a typical ZigBee network architecture.