
ZigBee networks
ZigBee router operation
XBee/XBee-PRO® S2C ZigBee® RF Module
65
Command Description
D5
Enables the Associate LED functionality.
LT
Sets the Associate LED blink time when joined. The default is 2 blinks per second
(router).
Permit joining
You can use
to configure the permit joining attribute on the coordinator. You can
configure
NJ
to always allow joining, or to allow joining for a short time.
Joining always enabled
If
NJ
=
0xFF
(default), joining is permanently enabled.
Use this mode carefully. Once a network has been deployed, we strongly recommend
that the application consider disabling joining to prevent unwanted joins from occurring.
Joining temporarily enabled
Set
NJ
<
0xFF
, to enable joining for only a number of seconds, based on the
NJ
parameter. Once the
XBee/XBee-PRO ZigBee RF Module joins a network, the timer starts. The coordinator does not re-
enable joining if the device is power cycled or reset. The following actions restart the permit-joining
timer:
n
Changing
NJ
to a different value (and applying changes with the
AC
or
CN
commands).
n
Pressing the Commissioning button twice.
n
Issuing the
CB
command with a parameter of 2.
The last two actions enable joining for one minute if
NJ
is
0x0
or
0xFF
. Otherwise, the Commissioning
button and the CB2 command enable joining for
NJ
seconds.
Router network connectivity
Once a router joins a ZigBee network, it remains connected to the network on the same channel and
PAN ID unless it is forced to leave (see
). If the scan channels (
SC
), PAN ID (
ID
) and
security settings (
EE
,
KY
) do not change after a power cycle, the router remains connected to the
network after a power cycle.
If a router is physically moved out of range of the network it initially joined, make sure the application
includes provisions to detect if the router can still communicate with the original network . If
communication with the original network is lost, the application may choose to force the router to
leave the network (see
). The XBee firmware includes two provisions to automatically
detect the presence of a network and leave if the check fails.
Power-On join verification
enables the power-on join verification check. If enabled, the XBee module
attempts to discover the 64-bit address of the coordinator when it first joins a network. Once it has
joined, it also attempts to discover the 64-bit address of the coordinator after a power cycle event. If 3
discovery attempts fail, the router leaves the network and try to join a new network. The default
setting for Power-on join verification is disabled (
JV
defaults to 0).
Содержание XBee
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Страница 259: ...AT commands Execution commands XBee XBee PRO S2C ZigBee RF Module 259 Parameter range N A Default N A ...
Страница 289: ...Regulatory information ANATEL Brazil XBee XBee PRO S2C ZigBee RF Module 289 ...
Страница 290: ...Regulatory information ANATEL Brazil XBee XBee PRO S2C ZigBee RF Module 290 ...
Страница 303: ...Load ZigBee firmware on 802 15 4 devices Background 304 Load ZB firmware 305 XBee XBee PRO S2C ZigBee RF Module 303 ...