[root@luckfox-rv1106 /mnt/sdfat/20250722]# LD_LIBRARY_PATH=/opt/bluez/lib /opt/b
luez/bin/sdptool browse DC:D8:7C:1E:CA:CD
Browsing DC:D8:7C:1E:CA:CD ...
Service Name: A2DP SNK Service
Service RecHandle: 0x10000
Service Class ID List:
  "Audio Sink" (0x110b)
Protocol Descriptor List:
  "L2CAP" (0x0100)
    PSM: 25
  "AVDTP" (0x0019)
    uint16: 0x0103
Language Base Attr List:
  code_ISO639: 0x656e
  encoding:    0x6a
  base_offset: 0x100
Profile Descriptor List:
  "Advanced Audio" (0x110d)
    Version: 0x0103

Service Name: A2DP SRC Service
Service RecHandle: 0x10001
Service Class ID List:
  "Audio Source" (0x110a)
Protocol Descriptor List:
  "L2CAP" (0x0100)
    PSM: 25
  "AVDTP" (0x0019)
    uint16: 0x0103
Language Base Attr List:
  code_ISO639: 0x656e
  encoding:    0x6a
  base_offset: 0x100
Profile Descriptor List:
  "Advanced Audio" (0x110d)
    Version: 0x0103

Service Name: A/V Remote Control
Service RecHandle: 0x10003
Service Class ID List:
  "AV Remote" (0x110e)
  "AV Remote Controller" (0x110f)
Protocol Descriptor List:
  "L2CAP" (0x0100)
    PSM: 23
  "AVCTP" (0x0017)
    uint16: 0x0104
Language Base Attr List:
  code_ISO639: 0x656e
  encoding:    0x6a
  base_offset: 0x100
Profile Descriptor List:
  "AV Remote" (0x110e)
    Version: 0x0106

Service Name: Handsfree Unit
Service RecHandle: 0x10002
Service Class ID List:
  "Handsfree" (0x111e)
  "Generic Audio" (0x1203)
Protocol Descriptor List:
  "L2CAP" (0x0100)
  "RFCOMM" (0x0003)
    Channel: 1
Language Base Attr List:
  code_ISO639: 0x656e
  encoding:    0x6a
  base_offset: 0x100
Profile Descriptor List:
  "Handsfree" (0x111e)
    Version: 0x0107

Service Name: SPP
Service RecHandle: 0x10004
Service Class ID List:
  UUID 128: 00001101-0000-1000-8000-00805f9b34fb
Protocol Descriptor List:
  "L2CAP" (0x0100)
  "RFCOMM" (0x0003)
    Channel: 2
Language Base Attr List:
  code_ISO639: 0x656e
  encoding:    0x6a
  base_offset: 0x100
Profile Descriptor List:
  "Serial Port" (0x00001101-0000-1000-8000-00805f9b34fb)
    Version: 0x0100

[root@luckfox-rv1106 /mnt/sdfat/20250722]# [14851.589743] aic_btusb: check_sco_event: HCI_EV_DISCONN_COMPLETE(0x05)