User's Manual

9XTend™ OEM RF Module - Product Manual v2.x6x
© 2010 Digi Internatonal, Inc. 33
PW (Pin Wake-up) Command
<Sleep (Low Power)> Under normal operation, an
RF module in Cyclic Sleep Mode cycles from an
active state to a low-power state at regular inter-
vals until data is ready to be received. If the PW
parameter is set to 1, the SLEEP pin (pin 8) can
be used to awaken the module from Cyclic Sleep.
When the SLEEP Pin is de-asserted (low), the
module will be fully operational and will not go
into Cyclic Sleep.
Once the SLEEP pin is asserted, the module will
remain active for the pe
riod of time specified by
the ST (Time before Sleep) parameter and will
return to Cyclic Sleep Mode (if no data is ready to
be transmitted). PW Command is only valid if Cyclic Sleep has been enabled.
RB (Packetization Threshold) Command
<Serial Interfacing> The RB command is used to
set/read the character threshold value.
RF transmission begins after data is received in
the DI Buffer and either of the following criteria is
met:
 RB characters received by the UART
 RO character times of silence detected on the
UART receive lines (after receiving at least 1
Byte of data)
If PK (Max. RF Packet Size) is lowered below the
value of RB, RB is automatically lowered to match the PK value. If (RO = 0), RB bytes must be
received before beginning transmiss
ion.
Note: RB and RO criteria only apply to the first packet of a multi-packet transmission. If data
remains in the DI Buffer after the first packet, transmissions will continue in a streaming manner
until there is no data left in the DI Buffer (UART receive buffer).
RC (Ambient Power - Single Channel) Command
<Diagnostics> The RC command is used to exam-
ine and report the power level on a given channel.
Sample output:-78 dBm [when CF = 0] 
4e [when CF = 1] 
-78 [when CF = 2]
RE (Restore Defaults) Command
<Diagnostics> The RE command is used to
restore all configurable parameters to their fac-
tory default settings.
The RE Command does not cause default values
to be stored to non-volatile (persistent) memory. For the restored default settings to persist in the
module’s non-volatile memory and be saved in the event of RF module reset or power-down, the
WR (Write) command must be issued prior to power-down or reset.
AT Command: ATPW
Binary Command: 0x1D (29 decimal)
Parameter Range: 0 - 1
Parameter Co
nfiguration
0 Disabled
1Enabled
Default Parameter Value: 0
Number of bytes returned: 1
Related Commands: SM (Sleep Mode), ST
(Time before Sleep)
AT Command: ATRB
Binary Command: 0x20 (32 decimal)
Parameter Range:0 - PK parameter value
(up to 0x800 Bytes)
Default Parameter Value: 0x800 Bytes
Number of bytes returned: 2
Related Commands: BR (RF Data Rate), PK (RF
Packet Size), RO (Packetization Timeout)
AT Command: ATRC
Parameter Range (read-only): 0 - 0x31 [dBm]
Number of bytes returned: 1
Related Commands: RM (Ambient Power - All
Channels)
AT Command: ATRE
Binary Command: 0x0E (14 decimal)