Murata Electronics North America Z2430HPA Manuel D’Utilisation
ZMN2405/ZMN2405HP Dev Kit
© 2007-2008 RFM Inc.
5
M-2405-0000 Rev. C-
2.2 Sleeping End Devices
ZigBee envisions that Routers and Coordinators will always be powered and never put to sleep
as they must always be awake since they do not know when another device may attempt to
communicate. End devices on the other hand, are expected to send data for a brief period of
time and then go to sleep for the majority of the time. When the End Device is asleep, any data
addressed to it will be held by the Router (or Coordinator) with which it is associated. When the
End Device wakes up, it will send a request for the Router (or Coordinator) to send any data it
may be holding. End Devices do not have to go to sleep. They can be configured as mains
powered and always be awake.
ZigBee provides that sleeping End Devices will do two things: 1) wake up periodically and see if
their parent device is holding data for them; and 2) wake up periodically and perform some
operation. It is possible to have an application poll sleeping End Devices. However, since the
End Device will not respond until it wakes, the amount of time the application must wait to
receive a response will be related to how often the End Device awakens.
The rest of the details of sleeping End Device modes are dependent on the application profile
used. Details of the sleep modes implemented in RFM’s CSM profile are provided in Section 8.9
of this manual.
as they must always be awake since they do not know when another device may attempt to
communicate. End devices on the other hand, are expected to send data for a brief period of
time and then go to sleep for the majority of the time. When the End Device is asleep, any data
addressed to it will be held by the Router (or Coordinator) with which it is associated. When the
End Device wakes up, it will send a request for the Router (or Coordinator) to send any data it
may be holding. End Devices do not have to go to sleep. They can be configured as mains
powered and always be awake.
ZigBee provides that sleeping End Devices will do two things: 1) wake up periodically and see if
their parent device is holding data for them; and 2) wake up periodically and perform some
operation. It is possible to have an application poll sleeping End Devices. However, since the
End Device will not respond until it wakes, the amount of time the application must wait to
receive a response will be related to how often the End Device awakens.
The rest of the details of sleeping End Device modes are dependent on the application profile
used. Details of the sleep modes implemented in RFM’s CSM profile are provided in Section 8.9
of this manual.
2.3 ZigBee
Addressing
The ZigBee standard provides for two means of addressing ZigBee devices, whether they are
Coordinators, Routers or End Devices: MAC Addresses and Network Addresses. MAC
addresses are just like MAC addresses in Ethernet networks. The MAC address is 8 bytes long,
is unique to each device and permanently stays with the device. Network addresses are 2 bytes
long and are assigned to ZigBee devices as they associate with the network. As such, the
network address is not known before the network forms and can change when a ZigBee device
re-associates with the network.
Much like an Ethernet device, RFM’s ZigBee modules have their MAC addresses programmed
into them at the factory as part of the manufacturing process. RFM’s prefix of
Coordinators, Routers or End Devices: MAC Addresses and Network Addresses. MAC
addresses are just like MAC addresses in Ethernet networks. The MAC address is 8 bytes long,
is unique to each device and permanently stays with the device. Network addresses are 2 bytes
long and are assigned to ZigBee devices as they associate with the network. As such, the
network address is not known before the network forms and can change when a ZigBee device
re-associates with the network.
Much like an Ethernet device, RFM’s ZigBee modules have their MAC addresses programmed
into them at the factory as part of the manufacturing process. RFM’s prefix of
00:30:66
is used
in the MAC address and thus can be used to identify RFM products. While the MAC address
uniquely identifies each ZigBee device - regardless of manufacturer or position in the network -
it contains no routing information and thus can be used only to communicate with devices that
uniquely identifies each ZigBee device - regardless of manufacturer or position in the network -
it contains no routing information and thus can be used only to communicate with devices that