EH-MA41 User Guide
14-26
Baud Rate
The new baud rate of the
Bluetooth module.
Value: 01h
—15h
01: 1200
02: 1800
03: 2400
04: 4800
05: 7200
06: 9600
07: 14400
08: 19200
09: 38400
0A: 56000
0B: 57600
0C: 115200
0D: 128000
0E: 230400
0F: 256000
10: 460800
11: 921600
12: 1382400
13: 1843200
14: 2764800
15: 3686400
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The default baud
rate may not be
9600 per software
version.
Remark: Default: 06 (9600)
Warning:
Please do NOT try to change to a new baud rate if you don't have a host which can work in that baud rate, for there is no
other way to restore it except for UART port.
5.1.11.4. Examples:
Ex. 5.30. To query the baud rate of Bluetooth module:
AT+BR<CR><LF>
query the baud rate.
BR=06<CR><LF>
report the baud rate,
it’s 9600.
Ex. 5.31. To change the baud rate of Bluetooth module:
AT+BR=0C<CR><LF>
change the baud rate to 115200.
OK<CR><LF>
response from the module to indicate the command is adopted.
Notes:
The response will be sent in current baud rate.
5.1.12. UM
—Query or configure the UART mode
5.1.12.1. Description:
This command can query or configure the UART mode of Bluetooth module. Once configured, the configuration will take
effect immediately and until the next time the module is configured by this command. It means the Bluetooth module will
remember the configuration, and even if the Bluetooth module has been powered off, the configuration will not be lost.
If the parameter is not presented, the Bluetooth module will report current configuration by the Indicator UM.
5.1.12.2. Syntax:
Synopsis:
AT+UM[=StopBits,Parity][,Latency]<CR><LF>
5.1.12.3. Parameter Description:
Parameter
Description
Mandatory
Comments
Stop Bits
The stop bits of UART mode
Value: 00h or 01h
00: 1 stop bit
01: 2 stop bits
Default: 00 (1 stop bit)
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