XBee®/XBee‐PRO® ZB SMT RF Modules
Networking
Networking Commands
AT
Name and Description
Command
Parameter Range
Default
XBee
0, 0x0B - 0x1A
Operating Channel. Read the channel number used for transmitting and receiving
CH
CE
between RF modules. Uses 802.15.4 channel numbers. A value of 0 means the device XBee-PRO
[read-only]
has not joined a PAN and is not operating on any channel.
0, 0x0B - 0x19
(Channels 11-25)
0 - Not a coordinator
1 - Coordinator
(SM must be 0 in order to
set CE to 1.)
Coordinator Enable. Set/read whether module is a coordinator.
0
Extended PAN ID. Set/read the 64-bit extended PAN ID. If set to 0, the coordinator will
select a random extended PAN ID, and the router / end device will join any extended
PAN ID. Changes to ID should be written to non-volatile memory using the WR
command to preserve the ID setting if a power cycle occurs.
0 -
ID
0
0xFFFFFFFFFFFFFFFF
Operating Extended PAN ID. Read the 64-bit extended PAN ID. The OP value reflects 0x01 -
OP
NH
[read-only]
0x1E
the operating extended PAN ID that the module is running on. If ID > 0, OP will equal ID. 0xFFFFFFFFFFFFFFFF
Maximum Unicast Hops. Set / read the maximum hops limit. This limit sets the
maximum broadcast hops value (BH) and determines the unicast timeout. The timeout
0 - 0xFF
is computed as (50 * NH) + 100 ms. The default unicast timeout of 1.6 seconds
(NH=0x1E) is enough time for data and the acknowledgment to traverse about 8 hops.
Broadcast Hops. Set/Read the maximum number of hops for each broadcast data
0 - 0x1E
BH
OI
0
transmission. Setting this to 0 will use the maximum number of hops.
Operating 16-bit PAN ID. Read the 16-bit PAN ID. The OI value reflects the actual 16-
0 - 0xFFFF
[read-only]
bit PAN ID the module is running on.
Node Discovery Timeout. Set/Read the node discovery timeout. When the network
discovery (ND) command is issued, the NT value is included in the transmission to
provide all remote devices with a response timeout. Remote devices wait a random
time, less than NT, before sending their response.
NT
0x20 - 0xFF [x 100 msec] 0x3C (60d)
Network Discovery options. Set/Read the options value for the network discovery
command. The options bitfield value can change the behavior of the ND (network
discovery) command and/or change what optional values are returned in any received
ND responses or API node identification frames. Options include:
0x01 = Append DD value (to ND responses or API node identification frames)
002 = Local device sends ND response frame when ND is issued.
NO
0 - 0x03 [bitfield]
0
Scan Channels. Set/Read the list of channels to scan.
Coordinator - Bit field list of channels to choose from prior to starting network.
Router/End Device - Bit field list of channels that will be scanned to find a Coordinator/
XBee
1 - 0xFFFF [bitfield]
XBee-PRO
1-0x7FFF
(bit 15 is not allowed)
Router to join.
Changes to SC should be written using WR command to preserve the SC setting if a
power cycle occurs.
SC
7FFF
Bit (Channel):
0 (0x0B)
1 (0x0C)
2 (0x0D)
3 (0x0E)
4 (0x0F)
5 (0x10)
6 (0x11)
7 (0x12)
8 (0x13)
9 (0x14)
10 (0x15)
11 (0x16)
12 (0x17)
13 (0x18)
14 (0x19)
15 (0x1A)
Scan Duration. Set/Read the scan duration exponent. Changes to SD should be
written using WR command.
Coordinator - Duration of the Active and Energy Scans (on each channel) that are
used to determine an acceptable channel and Pan ID for the Coordinator to startup on.
Router / End Device - Duration of Active Scan (on each channel) used to locate an
available Coordinator / Router to join during Association.
Scan Time is measured as:(# Channels to Scan) * (2 ^ SD) * 15.36ms - The number of
channels to scan is determined by the SC parameter. The XBee can scan up to 16
channels (SC = 0xFFFF).
SD
0 - 7 [exponent]
3
Sample Scan Duration times (13 channel scan):
If SD = 0, time = 0.200 sec
SD = 2, time = 0.799 sec
SD = 4, time = 3.190 sec
SD = 6, time = 12.780 sec
Note: SD influences the time the MAC listens for beacons or runs an energy scan on a
given channel. The SD time is not a good estimate of the router/end device joining time
requirements. ZigBee joining adds additional overhead including beacon processing on
each channel, sending a join request, etc. that extend the actual joining time.
ZigBee Stack Profile. Set / read the ZigBee stack profile value. This must be set the
same on all devices that should join the same network.
ZS
0 - 2
0
© 2010 Digi International, Inc.
127
DCD [ DIGITAL CORE DESIGN ]
