yes you can use other module, I just mention the current bsp support this as default, for your own BT, you just need UART port and PCM port (if need HFP)
I need to use "bccmd" to initialize the bt830 module. See below for information on using "bccmd". bccmd is not available for BSP. There is no bluez tool in the external directory. I tried to port the bluez tool from outside, but I couldn't port it because of numerous errors. Can you help me to use bccmd?