Command descriptions for the XBee/XBee-PRO RF Module
XBee / XBee-PRO RF Modules 802.15.4 Product Manual 85
SD (Scan Duration) command
<Networking {Association}> The SD command is used to set and read the exponent value that
determines the duration (in time) of a scan.
End Device (duration of active scan during association) - In a Beacon system, set SD = BE of the
Coordinator. SD must be set at least to the highest BE parameter of any Beaconing Coordinator with
which an End Device or Coordinator wish to discover.
Coordinator - If the ‘ReassignPANID’ option is set on the Coordinator [refer to A2 parameter], the SD
parameter determines the length of time the Coordinator will scan channels to locate existing PANs.
If the ‘ReassignChannel’ option is set, SD determines how long the Coordinator will perform an
Energy Scan to determine which channel it will operate on.
Scan Time is measured as ((# of Channels to Scan) * (2 ^ SD) * 15.36ms). The number of channels to
scan is set by the SC command. The XBee RF Module can scan up to 16 channels (SC = 0xFFFF). The
XBee PRO RF Module can scan up to 12 channels (SC = 0x1FFE).
SH (Serial Number High) command
<Diagnostics> The SH command is used to read the high 32 bits of the RF module's unique IEEE 64-bit
address.
The module serial number is set at the factory and is read-only.
SL (Serial Number Low) command
AT command: ATSD
Parameter range: 0 - 0x0F
Default parameter value: 4
Related commands: ED (Energy Scan), SC (Scan Channel)
Minimum firmware version required: v1.x80
If SD = 0, time = 0.18 sec SD = 8, time = 47.19 sec
SD = 2, time = 0.74 sec SD = 10, time = 3.15 min
SD = 4, time = 2.95 sec SD = 12, time = 12.58 min
SD = 6, time = 11.80 sec SD = 14, time = 50.33 min
AT command: ATSH
Parameter range: 0 - 0xFFFFFFFF [read-only]
Related commands: SL (Serial Number Low), MY (Source Address)
AT command: ATSL
Parameter range: 0 - 0xFFFFFFFF [read-only]
Related commands: SH (Serial Number High), MY (Source Address)
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