
AT commands
Network commands
XBee/XBee-PRO® S2C ZigBee® RF Module
230
NJ (Node Join Time)
Set or read the time that a Coordinator/Router allows nodes to join. You can changes this value at run
time without requiring a Coordinator or Router to restart. The time starts once the Coordinator or
Router starts, and the timer resets on power-cycle or when
NJ
changes.
For an end device to enable rejoining, set
NJ
less than 0xFF on the device that joins. If
NJ
< 0xFF, the
device assumes the network is not allowing joining and first tries to join a network using rejoining. If
multiple rejoining attempts fail, or if
NJ
=
0xFF
, the device attempts to join using association.
Parameter range
0 - 0xFF (x1 sec)
Default
0xFF (always allows joining)
JV (Channel Verification)
Set or read the channel verification parameter.
If
JV
=
1
, a router or end device verifies the coordinator is on its operating channel when joining or
coming up from a power cycle. If a coordinator is not detected, the router or end device leaves its
current channel and attempts to join a new PAN. If
JV
=
0
, the router or end device continues
operating on its current channel even if a coordinator is not detected.
Parameter range
0 - Channel verification disabled
1 - Channel verification enabled
Default
0
NW (Network Watchdog Timeout)
Set or read the network watchdog timeout value.
If
NW
is set > 0, the router monitors communication from the coordinator (or data collector) and
leaves the network if it cannot communicate with the coordinator for 3
NW
periods. The device resets
the timer each time it receives or sends data to a coordinator, or if it receives a many-to-one
broadcast.
Parameter range
0 - 0x64FF [x 1 minute](up to over 17 days)
Default
0 (disabled)
JN (Join Notification)
Set or read the join notification setting. If enabled, the device transmits a broadcast node
identification packet on power up and when joining. This action blinks the Associate LED rapidly on all
devices that receive the transmission, and sends an API frame out the serial port of API devices.
We recommend you disable this feature for large networks to prevent excessive broadcasts.