bluetooth centos

gistfile1.txt

gengwg@example:~/nc$ systemctl status bluetooth
● bluetooth.service - Bluetooth service
   Loaded: loaded (/usr/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
   Active: active (running) since Sat 2019-11-23 16:52:45 PST; 6min ago
     Docs: man:bluetoothd(8)
 Main PID: 20081 (bluetoothd)
   Status: "Running"
    Tasks: 1
   CGroup: /system.slice/bluetooth.service
           └─20081 /usr/libexec/bluetooth/bluetoothd

Nov 23 16:52:45 example bluetoothd[20081]: Bluetooth daemon 5.44
Nov 23 16:52:45 example systemd[1]: Started Bluetooth service.
Nov 23 16:52:45 example bluetoothd[20081]: Starting SDP server
Nov 23 16:52:45 example bluetoothd[20081]: Bluetooth management interface 1.14 initialized
Nov 23 16:52:45 example bluetoothd[20081]: Endpoint registered: sender=:1.66 path=/MediaEndpoint/A2DPSource
Nov 23 16:52:45 example bluetoothd[20081]: Endpoint registered: sender=:1.66 path=/MediaEndpoint/A2DPSink
Nov 23 16:52:47 example bluetoothd[20081]: Endpoint unregistered: sender=:1.66 path=/MediaEndpoint/A2DPSource
Nov 23 16:52:47 example bluetoothd[20081]: Endpoint unregistered: sender=:1.66 path=/MediaEndpoint/A2DPSink
Nov 23 16:52:50 example bluetoothd[20081]: Endpoint registered: sender=:1.66 path=/MediaEndpoint/A2DPSource
Nov 23 16:52:50 example bluetoothd[20081]: Endpoint registered: sender=:1.66 path=/MediaEndpoint/A2DPSink
gengwg@example:~/nc$ rfkill list
1: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no
gengwg@example:~/nc$ hcitool scan
Device is not available: No such device
gengwg@example:~/nc$ sudo hciconfig hci0 up
[sudo] password for gengwg: 
gengwg@example:~/nc$ sudo hciconfig hci0
hci0:   Type: Primary  Bus: USB
    BD Address: 00:19:86:00:10:90  ACL MTU: 1021:8  SCO MTU: 64:1
    UP RUNNING 
    RX bytes:1501 acl:0 sco:0 events:74 errors:0
    TX bytes:1098 acl:0 sco:0 commands:73 errors:0

gengwg@example:~/nc$ sudo hcitool scan
Scanning ...