AT commands
Networking and security commands
period of time, then checks again to see if the channel is clear. After a time, the process ends and the
data is lost.
Parameter range
0 - 3 (exponent)
Default
0
ND (Network Discovery)
This command applies to the XBee/XBee-PRO S2C 802.15.4 RF Module.
Discovers and reports all devices found in the network. For each discovered device, the following
information is returned after a jittered time delay:
Node discover response when issued in Command mode:
MY<CR> (2 bytes) (always 0xFFFE)
SH<CR> (4 bytes)
SL<CR> (4 bytes)
DB<CR> (Contains the detected signal strength of the response in negative dBm units)
NI <CR> (variable, 0-20 bytes plus 0x00 character)
PARENT_NETWORK ADDRESS<CR> (2 bytes)
DEVICE_TYPE<CR> (1 byte: 0 = Coordinator, 1 = Router, 2 = End Device)
STATUS<CR> (1 byte: reserved)
PROFILE_ID<CR> (2 bytes)
MANUFACTURER_ID<CR> (2 bytes)
DIGI DEVICE TYPE<CR> (4 bytes. Optionally included based on NO settings.)
RSSI OF LAST HOP<CR> (1 byte. Optionally included based on NO settings.)
A second carriage return will indicate the network discovery timeout (NT) has expired.
When operating in API mode and a Network Discovery is issued as a 0x08 or 0x09 frame, the response
will contain binary data except for the NI string in the following format:
2 bytes for Short Source Address
4 bytes for Upper Long Address
4 bytes for Lower Long Address
1 byte for the signal strength in -dBm (two's compliment representation)
NULL-terminated string for NI (Node Identifier) value (maximum 20 bytes without NULL
terminator)
Each device that responds to the request will generate a separate Local AT Command Response -
0x88.
Broadcast an ND command to the network. If the command includes an optional node identifier string
parameter, only those devices with a matching NI string respond without a random offset delay. If the
command does not include a node identifier string parameter, all devices respond with a random
offset delay.
The NT setting determines the maximum timeout (13 seconds by default), this value is sent along with
the discovery broadcast and determines the random delay the remote nodes use to prevent the
responses from colliding.
XBee/XBee-PRO S2C 802.15.4 RF Module User Guide
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ETC [ ETC ]
