hciconfig
[root@localhost lyd]# hciconfig
hci0: Type: BR/EDR Bus: USB
BD Address: 00:1A:7D:DA:71:13 ACL MTU: 310:10 SCO MTU: 64:8
DOWN
RX bytes:547 acl:0 sco:0 events:27 errors:0
TX bytes:384 acl:0 sco:0 commands:27 errors:0
[root@localhost lyd]# hciconfig hci0 up piscan
[root@localhost lyd]# hciconfig
hci0: Type: BR/EDR Bus: USB
BD Address: 00:1A:7D:DA:71:13 ACL MTU: 310:10 SCO MTU: 64:8
UP RUNNING PSCAN ISCAN
RX bytes:1130 acl:0 sco:0 events:60 errors:0
TX bytes:1040 acl:0 sco:0 commands:60 errors:0
[root@localhost lyd]# hcitool lescan
gatttool -i hci0 -t random -b E1:99:4B:CB:7D:30 -a 0x0f -n 0100 --listen --char-write-req