ICP DAS USA BLE-USB User Manual page 21

(3) Parameter
0: 115200
1: 57600
2: 38400
<baud rate>
3: 19200
4: 9600
Default: 0
(4) Example
AT+BR=1<CR>
OK<CR><LF>
AT+BR?<CR>
+BR: 1<CR><LF>
OK<CR><LF>
AT+BR=7<CR>
Error: 01<CR><LF>
AT+BR=?<CR>
+BR: 0~3<CR><LF>
OK<CR><LF>
AT+BR<CR>
Error: 04<CR><LF>
(refer to 3.1.25)
(refer to 3.1.25)
BLE-USB, USB to Bluetooth Low Energy Converter (Ver. 1.0, Oct/6/2016) 21