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ZP9D-115RM-LR Radio Modem
24
AT (Guard Time After) Command
Command Mode Options> AT
Command is used to set/read the
time-of-silence that follows the
command sequence character (CC
Command) of the AT Command
Mode Sequence (BT + CC + AT). By
default, 1 second must elapse
before and after the command
sequence character.
The times-of-silence surrounding the
command sequence character are used to prevent inadvertent entrance into AT Command
Mode. Refer to the ‘AT Command Mode’ section for more information regarding the
Command Mode Sequence.
BD (Interface Data Rate) Command
<Serial Interfacing> The BD
command is used to set and read
the serial interface data rate (baud
rate) used between the RF module
and host. This parameter
determines the rate at which serial
data is sent to the module from the
host. Modified interface data rates
do not take effect until the CN (Exit
AT Command Mode) command is
issued and the system returns the
'OK' response.
When parameters 0-8 are sent to
the module, the respective interface
data rates are used (as shown in
the table on the right).
The RF data rate is not affected by
the BD parameter. If the interface
data rate is set higher than the RF
data rate, a flow control
configuration may need to be
implemented.
The range between standard and non-standard baud rates (0x09 - 0x38) is invalid.
AT Command: ATAT
Binary Command: 0x05 (5 decimal)
Parameter Range: 2 - (ATST-3), up to 0x7FFC
[x 100 milliseconds]
Default Parameter Value: 0x0A (10 decimal)
Number of Bytes Returned: 2
Related Commands: BT (Guard Time Before),
CC (Command Sequence Character)
AT Command: ATBD
Binary Command: 0x15 (21 decimal)
Parameter Ranges: 0 - 8 (standard rates)_ 0x39 -
0x1C9C38 (non-standard rates)
Parameter
Configuration (bps)
0
1200
1
2400
2
4800
3
9600
4
19200
5
38400
6
57600
7
115200
8
230400
Default Parameter Value: 3
Non-standard baud rates supported as of
firmware v2.x20
Number of Bytes Returned: 4