Hcitool
$ hcitool dev
- to see if the Device was detected
$ hcitool scan
- to see if the Device is able to do anything, got an error:
Device is not available: No such device
- hciconfig hci0 up
- to power on the device, got an error:
Can't init device hci0: Device or resource busy (16)
- hciconfig hci0 piscan
Can't set scan mode on hci0: Network is down (100)
- hciconfig hci0 reset
Can't init device hci0: Device or resource busy (16)