Technical information

Nonvolatile Parameter Database
2-114 AT+i Commands Reference Manual May 31, 2008
+iBDRF - Define a Fixed Baud Rate on Host Connection
Syntax: AT+iBDRF=<n>
Sets the baud rate on host serial connection. This parameter is
saved to nonvolatile memory and activated only after power-up.
Parameters: n=3..9|'a'|'h'
Command Options:
n=a Set baud rate to Auto Baud.
n=3 Set baud rate to 2400.
n=4 Set baud rate to 4800.
n=5 Set baud rate to 9600.
n=6 Set baud rate to 19200.
n=7 Set baud rate to 38400.
n=8 Set baud rate to 57600.
n=9 Set baud rate to 115200.
n=h Set baud rate to 230400.
When BDRF is set to a, W24 boots in auto baud rate mode. In this
mode, W24 synchronizes on the first a or A character sent
(normally as part of an AT or AT+i command) and detect its baud
rate. The detected baud rate remains in effect until the W24 is
power-cycled or issued the AT+iBDRA command.
If BDRF is set to a fixed value and the MSEL signal is pulled low
for more than 5 seconds during runtime, W24 enters Rescue
mode and forces auto baud rate detection. BDRF value will be
used again upon the next power-up.
Default: 'a' (Auto Baud)
Result Code:
I/OK If n is within limits. W24 will continue operating in the current
baud rate setting. Further power-ups will initialize the baud rate to
the new selected value, until a different AT+iBDRF command is
issued.
I/ERROR Otherwise.
AT+iBDRF? Returns the code for the specified fixed baud rate followed by
I/OK.
AT+iBDRF=? Returns the message "3-9, 'a' or 'h'" followed by I/OK.