Operation
Networking
Destination reachable
Retries
Destination unreachable
Retries
CCA failure happened
Retries
MAC
3
Mac ACK
Config
TX
status
MAC
App
TX status MAC
App
App
TX status
Enabled
00
(Success)
up to up to
3 per RR
21
(Network
ACK
3
RR
value
02 (CCA
failure)
RR
value
app
value
retry
Failure)
Disabled
00
(Success)
0
up to
RR
value
21
(Network
ACK
0
RR
value
02 (CCA
failure)
3
RR
value
Failure)
Peer-to-peer networks
By default, XBee/XBee-PRO S2C 802.15.4 RF Module modules are configured to operate within a peer-
to-peer network topology and therefore are not dependent upon master/slave relationships. This
means that devices remain synchronized without the use of master/server configurations and each
device in the network shares both roles of master and slave. Our peer-to-peer architecture features
fast synchronization times and fast cold start times. This default configuration accommodates a wide
range of RF data applications.
Master/slave networks
In a Master Slave network, there is a coordinator and one or more end devices. When end devices
associate to the coordinator, they become members of that Personal Area Network (PAN). As such,
they share the same channel and PAN ID. PAN IDs must be unique to prevent miscommunication
between PANs. Depending on the A1 and A2 parameters, association may assist in automatically
assigning the PAN ID and the channel. These parameters are specified below based on the network
role (end device or coordinator).
End device association
End device association occurs if CE is 0 and A1 has bit 2 set. See the following table.
Bit
Hex value
Meaning
0
0x01
Allow PAN ID reassignment
1
2
3
0x02
0x04
0x08
Allow channel reassignment
Auto association
Poll coordinator on pin wake
XBee/XBee-PRO S2C 802.15.4 RF Module User Guide
44
ETC [ ETC ]
