我对这个问题感到困惑。我有以下设备（它是一款中国智能手表），其 MAC 地址显示在 blueman 和 Bettercap 上，但没有出现在 hcitool 上。
我用：
sudo hcitool lescan
LE Scan ...
C0:28:8D:D6:66:EA
C0:28:8D:D6:66:EA (unknown)
但是Q1的设备MAC地址EB:15:0C:38:C9:B0没有出现。
我尝试更好的帽：
sudo bettercap
» ble.recon on
» [12:01:38] [ble.device.new] new BLE device Q1 detected as EB:15:0C:38:C9:B0 -77 dBm.
但是，我也得到：
当我做：
» ble.show
│ -76 dBm │ eb:15:0c:38:c9:b0 │ │ Limited Discoverable, BR/EDR Not Supported │ ✔ │ 12:05:38 │
» ble.enum eb:15:0c:38:c9:b0
[12:07:06] [sys.log] [inf] ble.recon connecting to eb:15:0c:38:c9:b0 ...
»
┌──────────────┬───────────────────────────────────────────────────────┬──────────────────────────────────────────────────┬────────────────────────────────────────────────┐
│ Handles │ Service > Characteristics │ Properties │ Data │
├──────────────┼───────────────────────────────────────────────────────┼──────────────────────────────────────────────────┼────────────────────────────────────────────────┤
│ 0001 -> 0004 │ Generic Attribute (1801) │ │ │
│ 0003 │ Service Changed (2a05) │ BCAST, READ, WRITE, NOTIFY, INDICATE, SIGN WRITE │ 00000000 │
│ │ │ │ │
│ 0005 -> 000f │ Generic Access (1800) │ │ │
│ 0007 │ Device Name (2a00) │ READ │ Q1 │
│ 0009 │ Appearance (2a01) │ READ │ Unknown │
│ 000b │ Peripheral Privacy Flag (2a02) │ READ │ Privacy Disabled │
│ 000d │ Peripheral Preferred Connection Parameters (2a04) │ READ │ Connection Interval: 224 -> 240 │
│ │ │ │ Slave Latency: 4 │
│ │ │ │ Connection Supervision Timeout Multiplier: 500 │
│ 000f │ 2aa6 │ READ │ 00 │
│ │ │ │ │
│ 0010 -> 0015 │ 6e400001b5a3f393e0a9e50e24dcca9e │ │ │
│ 0012 │ 6e400003b5a3f393e0a9e50e24dcca9e │ NOTIFY │ │
│ 0015 │ 6e400002b5a3f393e0a9e50e24dcca9e │ WRITE │ │
│ │ │ │ │
│ 0016 -> 002d │ Human Interface Device (1812) │ │ │
│ 0018 │ Protocol Mode (2a4e) │ READ, WRITE │ insufficient encryption │
│ 001a │ Report (2a4d) │ READ, WRITE, NOTIFY │ insufficient encryption │
│ 001e │ Report (2a4d) │ READ, WRITE, NOTIFY │ insufficient encryption │
│ 0022 │ Report (2a4d) │ READ, WRITE, NOTIFY │ insufficient encryption │
│ 0026 │ Report Map (2a4b) │ READ │ insufficient encryption │
│ 0028 │ Boot Mouse Input Report (2a33) │ READ, WRITE, NOTIFY │ insufficient encryption │
│ 002b │ HID Information (2a4a) │ READ │ insufficient encryption │
│ 002d │ HID Control Point (2a4c) │ WRITE │ │
│ │ │ │ │
│ 002e -> 0037 │ fee7 │ │ │
│ 0030 │ fec9 │ READ, NOTIFY │ ë150c8É° │
│ 0033 │ fea1 │ READ, INDICATE │ 07a001009e0100a00100 │
│ 0036 │ fea2 │ READ, WRITE, INDICATE │ Ð │
│ │ │ │ │
└──────────────┴───────────────────────────────────────────────────────┴──────────────────────────────────────────────────┴────────────────────────────────────────────────┘
但是我不确定这一切意味着什么。我发现 bettercap 非常令人困惑。
» ^D
Are you sure you want to quit this session? y/n y
[12:08:07] [sys.log] [inf] ble.recon stopping scan ...
我也试过 gattool：
sudo gatttool -t random -b EB:15:0C:38:C9:B0 -I
[EB:15:0C:38:C9:B0][LE]> sec-level low
[EB:15:0C:38:C9:B0][LE]> connect
Attempting to connect to EB:15:0C:38:C9:B0
Error: connect to EB:15:0C:38:C9:B0: Device or resource busy (16)
[EB:15:0C:38:C9:B0][LE]>
我很抱歉，但我不知道该怎么做。如果可能的话，我想读写这个设备。我在 Fedora 33 Linux 上。
提前感谢您的帮助！
感谢您提供有关 bluetoothctl 的信息。所以，我试试这个并得到：
$ sudo bluetoothctl
Agent registered
[Q1]# devices
Device EB:15:0C:38:C9:B0 Q1
Device E0:7B:1F:EB:C1:6C LH719
Device A4:C1:1C:F6:02:92 MS1020
[Q1]# connect EB:15:0C:38:C9:B0
Attempting to connect to EB:15:0C:38:C9:B0
Connection successful
但是从这里阅读：https ://budimir.cc/2020/02/27/ble-on-linux-with-bluetoothctl/看来我应该得到比上述更多的信息。
但是，我补充说：
[Q1]# menu gatt
Menu gatt:
Available commands:
-------------------
list-attributes [dev/local] List attributes
select-attribute <attribute/UUID> Select attribute
attribute-info [attribute/UUID] Select attribute
read [offset] Read attribute value
write <data=xx xx ...> [offset] [type] Write attribute value
acquire-write Acquire Write file descriptor
release-write Release Write file descriptor
acquire-notify Acquire Notify file descriptor
release-notify Release Notify file descriptor
notify <on/off> Notify attribute value
clone [dev/attribute/UUID] Clone a device or attribute
register-application [UUID ...] Register profile to connect
unregister-application Unregister profile
register-service <UUID> [handle] Register application service.
unregister-service <UUID/object> Unregister application service
register-includes <UUID> [handle] Register as Included service in.
unregister-includes <Service-UUID><Inc-UUID> Unregister Included service.
register-characteristic <UUID> <Flags=read,write,notify...> [handle] Register application characteristic
unregister-characteristic <UUID/object> Unregister application characteristic
register-descriptor <UUID> <Flags=read,write...> [handle] Register application descriptor
unregister-descriptor <UUID/object> Unregister application descriptor
back Return to main menu
version Display version
quit Quit program
exit Quit program
help Display help about this program
export Print environment variables
并且似乎确实获得了服务列表（我现在将对其进行调查）：
[Q1]# list-attributes
Primary Service (Handle 0x0100)
/org/bluez/hci0/dev_EB_15_0C_38_C9_B0/service002e
0000fee7-0000-1000-8000-00805f9b34fb
Tencent Holdings Limited.
Characteristic (Handle 0x7da4)
/org/bluez/hci0/dev_EB_15_0C_38_C9_B0/service002e/char0035
0000fea2-0000-1000-8000-00805f9b34fb
Intrepid Control Systems, Inc.
Descriptor (Handle 0x0015)
/org/bluez/hci0/dev_EB_15_0C_38_C9_B0/service002e/char0035/desc0037
00002902-0000-1000-8000-00805f9b34fb
Client Characteristic Configuration
Characteristic (Handle 0x9248)
/org/bluez/hci0/dev_EB_15_0C_38_C9_B0/service002e/char0032
0000fea1-0000-1000-8000-00805f9b34fb
Intrepid Control Systems, Inc.
Descriptor (Handle 0x0015)
/org/bluez/hci0/dev_EB_15_0C_38_C9_B0/service002e/char0032/desc0034
00002902-0000-1000-8000-00805f9b34fb
Client Characteristic Configuration
Characteristic (Handle 0xaf18)
/org/bluez/hci0/dev_EB_15_0C_38_C9_B0/service002e/char002f
0000fec9-0000-1000-8000-00805f9b34fb
Apple, Inc.
Descriptor (Handle 0x0015)
/org/bluez/hci0/dev_EB_15_0C_38_C9_B0/service002e/char002f/desc0031
00002902-0000-1000-8000-00805f9b34fb
Client Characteristic Configuration
Primary Service (Handle 0x9d80)
/org/bluez/hci0/dev_EB_15_0C_38_C9_B0/service0010
6e400001-b5a3-f393-e0a9-e50e24dcca9e
Nordic UART Service
Characteristic (Handle 0xd894)
/org/bluez/hci0/dev_EB_15_0C_38_C9_B0/service0010/char0014
6e400002-b5a3-f393-e0a9-e50e24dcca9e
Nordic UART TX
Characteristic (Handle 0xd894)
/org/bluez/hci0/dev_EB_15_0C_38_C9_B0/service0010/char0011
6e400003-b5a3-f393-e0a9-e50e24dcca9e
Nordic UART RX
Descriptor (Handle 0x0015)
/org/bluez/hci0/dev_EB_15_0C_38_C9_B0/service0010/char0011/desc0013
00002902-0000-1000-8000-00805f9b34fb
Client Characteristic Configuration
Primary Service (Handle 0x9d80)
/org/bluez/hci0/dev_EB_15_0C_38_C9_B0/service0001
00001801-0000-1000-8000-00805f9b34fb
Generic Attribute Profile
Characteristic (Handle 0xff84)
/org/bluez/hci0/dev_EB_15_0C_38_C9_B0/service0001/char0002
00002a05-0000-1000-8000-00805f9b34fb
Service Changed
Descriptor (Handle 0x0015)
/org/bluez/hci0/dev_EB_15_0C_38_C9_B0/service0001/char0002/desc0004
00002902-0000-1000-8000-00805f9b34fb
Client Characteristic Configuration
[Q1]#