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XBee‐PRO® 900 OEM RF Modules
Diagnostics Commands
AT
Name and Description
Command
RSSI PWM timer Set or read the time that the RSSI output (indicating signal strength)
RP
will remain active after the last reception. Time units are measured in tenths of seconds
Transmission Errors Read the number of MAC frames that exhaust MAC retries
TR
without ever receiving a MAC acknowledgement message from the adjacent node.
When the value reaches 0xffff, it stays there.
Temperature Read module temperature in Celsius. Negatives temperatures can be
TP
returned.
Supply Voltage. Reads the voltage on the Vcc pin in mV. Should be read module
%V
voltage in milivolts.
AT Command Options
AT Command Options Commands
AT
Name and Description
Command
Command Mode Timeout. Set/Read the period of inactivity (no valid commands
CT
received) after which the RF module automatically exits AT Command Mode and returns
to Idle Mode.
CN
Exit Command Mode. Explicitly exit the module from AT Command Mode.
Guard Times. Set required period of silence before and after the Command Sequence
GT
Characters of the AT Command Mode Sequence (GT + CC + GT). The period of silence
is used to prevent inadvertent entrance into AT Command Mode.
Command Character. Set or read the character to be used between guard times of the
CC
AT Command Mode Sequence. The AT Command Mode Sequence causes the radio
modem to enter Command Mode (from Idle Mode).
Node Identification Commands
AT
Name and Description
Command
PAN ID. Set or read the user network address. Nodes must have the same network
ID
address to communicate. Changes to ID should be written to non-volatile memory using
the WR command.
Node Discover Timeout. Set/Read the amount of time a node will spend discovering
NT
other nodes when ND or DN is issued.
Node Identifier. Stores a string identifier. The string accepts only printable ASCII data
In AT Command Mode, the string can not start with a space. A Carriage return ends the
NI
command. Command will automatically end when maximum bytes for the string have
been entered. This string is returned as part of the ATND (Network Discover) command.
This identifier is also used with the ATDN (Destination Node) command. .
Discover Node - Destination Node. Resolves an NI (Node Identifier) string to a
physical address (casesensitive).
The following events occur after the destination node is discovered:
<AT Firmware>
1. DL & DH are set to the extended (64-bit) address of the module with the matching NI
(Node Identifier) string.
2. OK (or ERROR)\r is returned.
DN
3. Command Mode is exited to allow immediate communication
<API Firmware>
The 16-bit network and 64-bit extended addresses are returned in an API Command
Response frame.
If there is no response from a module within (NT * 100) milliseconds or a parameter is
not specified (left blank), the command is terminated and an "ERROR" message is
returned. In the case of an ERROR, Command Mode is not exited.
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Node Identification
© 2008 Digi International, Inc.
Parameter Range
Default
0x20 = 3.2
1 to 0xff
seconds
n/a
n/a
0xff74 to 0x0258
n/a
-0-0x/F00
n/a
Parameter Range
Default
0XFFF w VPDG
0x64 (100d)
--
--
0x3E8
0 to 0xFFFF
(1000d)
0 - 0xFF
0x2B
Parameter Range
Default
0x0000 to 0x7FFF
0x7FFF
0 - 0xFC
0x82 (130d)
[x 100 msec]
up to 20 byte ASCII string a space character
20 byte ascii string
23
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