ICP DAS USA BLE-USB User Manual page 37

(3) Parameter
The role connection
Range: 0~1
< role > 0: Slave (Peripheral)
1: Master (Central)
Default: 0
(4) Example
AT+ROLE=1<CR>
OK<CR><LF>
AT+ROLE?<CR>
+ROLE: 1<CR><LF>
OK<CR><LF>
AT+ROLE=?<CR>
+ROLE: 0~1<CR><LF>
OK<CR><LF>
AT+ROLE=10<CR>
Error: 01<CR><LF>
AT+ROLE<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) 37