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ZP9D-115RM-LR Radio Modem
38
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
intervals 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
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)