AT commands
Network and security commands
Digi XBee® 3 802.15.4 RF Module User Guide
132
NT (Node Discover Timeout)
Sets or displays the amount of time a base node waits for responses from other nodes when using the
ND
(Node Discover) command. The
NT
value is transmitted along with the
ND
command; remote
nodes set up a random hold-off time based on this timeout. Once the
ND
command has ended, the
base discards any responses it receives.
Parameter range
0x1 - 0xFC (x 100 ms)
Default
0x19 (2.5 seconds)
NO (Node Discovery Options)
Use
NO
to suppress or include a self-response to
ND
(Node Discover) commands. When
NO
bit 1 is set,
a device performing a Node Discover includes a response entry for itself.
Parameter range
0 - 1
Default
0x0
MM (MAC Mode)
Use the
MM
command to specify the operating MAC Mode; for more information see
.
The MAC Mode serves two purposes:
n
Enable/disable the use of a Digi header, which enables advanced features.
n
Enable/disable MAC-Layer acknowledgments.
The default configuration enables a Digi-specific header to every RF packet. This header includes
information that allows for some advanced features:
n
Network discovery support [
and
]
n
Application-layer retries [
]
n
Duplicate packet detection [
]
n
Remote AT command support [
Remote AT Command Request frame - 0x17
The presence of the Digi header prevents interoperability with third-party devices. When the Digi
header is disabled, encrypted data that is not valid is sent out of the UART and not filtered out. The
Digi header can be disabled by setting
MM
to
1
or
2
.
When
MM
is set
1
or
3
, MAC-layer retries are disabled.
Parameter range
0 - 3
