Peer-To-Peer Networks; Master/Slave Networks - Digi XBee S2C 802.15.4 User Manual

Operation
Destination reachable
Mac ACK
Config
TX status
Enabled 00
(Success)
Disabled 00
(Success)

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
0 0x01
1 0x02
2 0x04
3 0x08
XBee/XBee-PRO S2C 802.15.4 RF Module User Guide
Destination unreachable
Retries
MAC App TX status
up to 3 up to 21
per app RR (Network
retry value ACK Failure)
0 up to 21
RR (Network
value ACK Failure)
Meaning
Allow PAN ID reassignment
Allow channel reassignment
Auto association
Poll coordinator on pin wake
CCA failure
happened
Retries Retries
TX
MAC App status MAC App
3 RR 02 (CCA 3
value failure)
0 RR 02 (CCA 3
value failure)
Networking
RR
value
RR
value
44