Comment # 3 on bug 1234766 from Leo Bistmans

applet in debug mode

shows it just connects audio

blueman-applet 12.22.21 DEBUG    Base:67 _properties_changed:
/org/bluez/hci1/dev_49_94_11_08_58_C2 {'Connected': True} [] <Device.Device
object at 0x7f5f39981240 (blueman+bluez+Device+Device at 0x55800d192270)>
blueman-applet 12.22.23 INFO     PulseAudioUtils:337 __event_callback: 9 550
blueman-applet 12.22.23 DEBUG    PulseAudioProfile:111 on_pa_event: 9 550
blueman-applet 12.22.23 INFO     PulseAudioProfile:124 on_pa_event: card
blueman-applet 12.22.23 INFO     PulseAudioProfile:131 on_pa_event: add
blueman-applet 12.22.23 INFO     PulseAudioUtils:337 __event_callback: 25 550
blueman-applet 12.22.23 DEBUG    PulseAudioProfile:111 on_pa_event: 25 550
blueman-applet 12.22.23 INFO     PulseAudioProfile:124 on_pa_event: card
blueman-applet 12.22.23 INFO     PulseAudioProfile:126 on_pa_event: change
blueman-applet 12.22.23 INFO     PulseAudioUtils:337 __event_callback: 25 550
blueman-applet 12.22.23 DEBUG    PulseAudioProfile:111 on_pa_event: 25 550
blueman-applet 12.22.23 INFO     PulseAudioProfile:124 on_pa_event: card
blueman-applet 12.22.23 INFO     PulseAudioProfile:126 on_pa_event: change
blueman-applet 12.22.23 INFO     PulseAudioUtils:337 __event_callback: 25 550
blueman-applet 12.22.23 DEBUG    PulseAudioProfile:111 on_pa_event: 25 550
blueman-applet 12.22.23 INFO     PulseAudioProfile:124 on_pa_event: card
blueman-applet 12.22.23 INFO     PulseAudioProfile:126 on_pa_event: change
blueman-applet 12.22.53 INFO     Notification:242 do_g_signal: 2
blueman-applet 12.22.53 DEBUG    Notification:248 do_g_signal: The notification
was dismissed by the user.

This is mouse click serial port connect:

blueman-applet 12.23.25 INFO     RecentConns:112 notify    : <Device.Device
object at 0x7f5f39981240 (blueman+bluez+Device+Device at 0x55800d192270)>
00001101-0000-1000-8000-00805f9b34fb
rfcomm channel: 7
blueman-applet 12.23.25 INFO     SerialService:103 connect   : Starting rfcomm
watcher as root

blueman-manager info:
49:94:11:08:58:C2
public
JDY-67-Audio
JDY-67-Audio
0x260414
0x0000
audio-card
yes
yes
no
no
yes
00001101-0000-1000-8000-00805f9b34fb Serial Port
0000110b-0000-1000-8000-00805f9b34fb Audio Sink
0000110c-0000-1000-8000-00805f9b34fb Remote Control Target
0000110d-0000-1000-8000-00805f9b34fb Advanced Audio
0000110e-0000-1000-8000-00805f9b34fb Remote Control
0000110f-0000-1000-8000-00805f9b34fb Video Conferencing
0000111e-0000-1000-8000-00805f9b34fb Handsfree
/org/bluez/hci1