User's Manual

XTend™RFModule‐ProductManual
©2013DigiInternatonal,Inc. 26
CN (Exit AT Command Mode) Command
<Command Mode Options> The CN command is
used to explicitly exit the module from AT
Command Mode.
CS (GPO1 Configuration) Command
<Serial Interfacing> CS Command is used to
select the behavior of the GP01 pin (pin 9). This
output can provide RS-232 flow control, control
the TX enable signal (for RS-485 or RS-422
operations).
By default, GP01 provides RS-232 CTS
(Clear-to-
Send) flow control.
CT (Command Mode Timeout) Command
<Command Mode Options> The CT command is
used to set and read the amount of inactive time
that elapses before the module automatically
exits from AT Command Mode and returns to Idle
Mode.
Use the CN (Exit AT Command Mode) command
to exit AT Command Mode manually.
DB (Received Signal Strength) Command
<Diagnostics> DB Command is used to read the
receive signal strength (in decibels relative to
milliWatts) of the last received packet. This
parameter is useful in determining range
characteristics of the RF modules under various
conditions.
In default mode, this command shows the power level in signed decimal format with the units
(dBm). If CF = 1, the magnitude of the value is presented in unsigned hex. If CF = 2, the value is
presented in decimal, but without the units.
Sample Output:-88 dBm(when ATCF = 0)
58 (when ATCF = 1)
-88 (when ATCF = 2)
NOTE: If the DB register is read before the module has received an RF packet, the module will
return a value of 0x8000 (which means an RF packet has not yet been received).
AT Command: ATCN
Binary Command: 0x09 (9 decimal)
AT Command: ATCS
Binary Command: 0x1F (31 decimal)
Parameter Range: 0 - 4
Parameter Configuration
0 RS-232 CTS
flow control
1 RS-485 TX enable low
2High
3 RS-485 TX enable high
4Low
Default Parameter Value: 0
Number of bytes returned: 1
Related Commands: RT (GPI1 Configuration),
TO (GP01 Timeout)
AT Command: ATCT
Binary Command: 0x06 (6 decimal)
Parameter Range:2 - 0xFFFF
[x 100 milliseconds]
Default Parameter Value: 0xC8 (200d)
Number of bytes returned: 2
Related Command: CN (Exit AT Command
Mode)
AT Command: ATDB
Binary Command: 0x36 (54 decimal)
Parameter Range (read-only): 0x6E - 0x28
(-110 to -40 Decimal)
Number of bytes returned: 2