Command descriptions
9XTend-PKG-R RS-232/485 RF Modem User Guide
56
PW (Pin Wake-up) Command
<Sleep (Low Power)> Under normal operation, an RF modem in Cyclic Sleep Mode cycles from an active state to a low-
power state at regular intervals until data is ready to be received. If the PW parameter is set to 1, the GPI2 pin (SLEEP)
can be used to awaken the modem from Cyclic Sleep. When the GPI2 Pin is de-asserted (low), the modem will be fully
operational and will not go into Cyclic Sleep.
Once the GPI2 pin is asserted, the modem will remain active for the period 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 transmission.
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).
AT Command: ATPW
Binary Command: 0x1D (29 decimal)
Parameter Range: 0 - 1
Parameter
Configuration
0
Disabled
1
Enabled
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)