Hi I was using bcsp protocol with my CSR chip I use hciattach /dev/ttyS1 bcsp hciconfig hci0 up to bring up the hci0 At this point ~ # bccmd -t hci psget -s 0x0000 0x0001 Bluetooth address: 0x0000 0xa5a5 0x5b00 0x0200 can work. but : ~ # bccmd -t bcsp psget -s 0x0000 0x0001 Initialization timed out So , what's right way to use bccmd with bcsp protocol ?? Raymond