Digi XBee 3 802.15.4, User Manual

Page: 131 / 264

AT commands Network and security commands
Digi XBee® 3 802.15.4 RF Module User Guide 131
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.
For more information about the options that affect the behavior of the ND command, see NO (Node
Discovery Options) .
WARNING! If the NT setting is small relative to the number of devices on the network,
responses may be lost due to channel congestion. Regardless of the NT setting, because
the random offset only mitigates transmission collisions, getting responses from all devices
in the network is not guaranteed.
Parameter range
20-byte printable ASCII string
Default
N/A
DN (Discover Node)
Resolves an NI (Node identifier) string to a physical address (case sensitive).
The following events occur after DN discovers the destination node:
When DN is sent in Command mode:
1. The device sets DL and DH to the address of the device with the matching NI string.
2. The receiving device returns OK (or ERROR).
3. The device exits Command mode to allow for immediate communication. If an ERROR is
received, then Command mode does not exit.
When DN is sent as a local AT Command API frame:
1. The receiving device returns the 16-bit network and 64-bit extended addresses in an API
Command Response frame.
2. If there is no response from a module within ( NT * 100) milliseconds or you do not specify a
parameter (by leaving it blank), the receiving device returns an ERROR message. In the case of
an ERROR, the device does not exit Command mode. Set the radius of the
DN command using
the BH command.
When DN is sent as a local AT Command frame - 0x08 :
1. The receiving device returns a success response in a AT Command Response frame - 0x88 .
2. If there is no response from a module within ( NT * 100) milliseconds or you do not specify a
parameter (by leaving it blank), the receiving device returns an ERROR message.
Parameter range
20-byte ASCII string
Default
N/A