User's Guide

AT commands Networking and security commands
XBee/XBee-PRO S2C 802.15.4 RF Module User Guide
79
Parameter range
N/A
Default
N/A
AS (Active Scan)
Sends a Beacon Request to a Broadcast address (0xFFFF) and Broadcast PAN (0xFFFF) on every
channel in SC. SD determines the amount of time the device listens for Beacons on each channel. A
PanDescriptor is created and returned for every Beacon received from the scan. Each PanDescriptor
contains the following information:
CoordAddress (SH + SL parameters)<CR>
Note If MY on the coordinator is set less than 0xFFFF, the MY value is displayed.
CoordPanID (ID parameter)<CR>
CoordAddrMode <CR>
0x02 = 16-bit Short Address
0x03 = 64-bit Long Address
Channel (CH parameter) <CR>
SecurityUse<CR> - will always report 0x00
ACLEntry<CR> - will always report 0x00
SecurityFailure<CR> - will always report 0x00
SuperFrameSpec<CR> (2 bytes):
bit 15 - Association Permitted (MSB) - depending on bit 3 of A2 (Coordinator Association)
bit 14 - PAN Coordinator
bit 13 - Reserved
bit 12 - Battery Life Extension
bits 8-11 - Final CAP Slot
bits 4-7 - Superframe Order
bits 0-3 - Beacon Order
GtsPermit<CR>
RSSI<CR> (- RSSI is returned as -dBm)
TimeStamp<CR> (3 bytes)
<CR> (A carriage return <CR> is sent at the end of the AS command)
The Active Scan is capable of returning up to five PanDescriptors in a scan. The actual scan time on
each channel is measured as:
Time = [(2 ^ (SD Parameter)) * 15.36] ms.
Total scan time is this time multiplied by the number of channels to be scanned (as determined by the
SC parameter).
Refer to the scan table in SD (Scan Duration) to determine scan times. If using API Mode, no <CR>’s
are returned in the response. For more information, see Operate in API mode. If no PANs are
discovered during the scan, only one carriage return is printed.