Audio is routing via Bluetooth but device list have Earpiece & Speaker phone only and BT option is not available

[tech-ajit-mob]

The Bluetooth icon is not showing but the audio is routing via Bluetooth.

BT- Bluetooth

1. Bluetooth is ON and connected> Incoming call is received and user is landed on the ongoing call screen
2. Audio is coming via Bluetooth but Bluetooth icon is not showing on the ongoing call screen instead phone icon is showing.
3. If you tap on the phone icon, audio switch options are only phone and speaker.

To Reproduce
Steps to reproduce the behavior:

1. BT is connected and receives the call
2. Click on the accept button
3. Voice is routing via BT and it's working fine also you can change the mode from BT to Speaker or Phone.
4. Disconnect BT from the notification drawer and reconnect again and working fine.
5. Disconnect the call.
6. BT is connected, again receives the incoming call, and clicks on the accept button
7. User can hear the voice through BT but the Devices list shows [Earpiece(name=Earpiece), Speakerphone(name=Speakerphone)] only

Expected behavior
BT options should be there in the device list.

Actual behavior
The voice is transmitted through Bluetooth, but Bluetooth does not appear in the device list, preventing us from displaying the Bluetooth option in the UI.

Application Logs Steps wise
Step1 to 5

• 15:03:19.267 D AudioSwitch(1.2.0)
  15:03:19.267 D Preferred device list = [BluetoothHeadset, WiredHeadset, Earpiece, Speakerphone]
  15:03:19.276 D Earpiece available
  15:03:19.276 D Speakerphone available
  15:03:19.277 D Available AudioDevice list updated: [Earpiece(name=Earpiece), Speakerphone(name=Speakerphone)]
  15:03:19.277 D Current user selected AudioDevice = null
  15:03:19.304 D Bluetooth Jabra Elite 4 connected
  15:03:19.309 D Device size 1 with device name: Jabra Elite 4
  15:03:19.309 D Earpiece available
  15:03:19.309 D Speakerphone available
  15:03:19.309 D Available AudioDevice list updated: [Earpiece(name=Earpiece), Speakerphone(name=Speakerphone)]
  15:03:19.309 D Current user selected AudioDevice = null
  15:03:19.309 D Bluetooth SCO connected
  15:03:22.133 W Cannot deactivate when in the Disconnected state

Step 6 : Disconnect BT

• 15:00:04.001 D Bluetooth disconnected
  15:00:04.001 D Headset state changed to Disconnected
  15:00:04.001 D Earpiece available
  15:00:04.908 D Speakerphone available
  15:00:04.908 D Available AudioDevice list updated: [Earpiece(name=Earpiece), Speakerphone(name=Speakerphone)]
  15:00:04.908 D Current user selected AudioDevice = null
  15:00:04.930 W Cannot deactivate when in the Disconnected state
  15:00:04.942 D Bluetooth SCO disconnected

Step 6: Reconnect BT: Working fine

• 15:00:33.896 D Bluetooth SCO disconnected
  15:00:34.077 D Bluetooth headset BluetoothDeviceWrapperImpl(device=XX:XX:XX:XX:54:B4, name=Jabra Elite 4, deviceClass=7936) connected
  15:00:34.080 D Headset state changed to Connected
  15:00:34.080 D Earpiece available
  15:00:34.418 D Speakerphone available
  15:00:34.419 D Available AudioDevice list updated: [BluetoothHeadset(name=Jabra Elite 4), Earpiece(name=Earpiece), Speakerphone(name=Speakerphone)]
  15:00:34.419 D Current user selected AudioDevice = null
  15:00:34.426 D Scheduled bluetooth sco job
  15:00:34.429 D Bluetooth SCO disconnected
  15:00:34.432 D Attempting to enable bluetooth SCO
  15:00:34.432 D Headset state changed to AudioActivating
  15:00:34.482 D Bluetooth SCO connecting
  15:00:34.580 D Bluetooth audio connected on device BluetoothDeviceWrapperImpl(device=XX:XX:XX:XX:54:B4, name=Jabra Elite 4, deviceClass=7936)
  15:00:34.580 D Canceled bluetooth sco job
  15:00:34.580 D Headset state changed to AudioActivated
  15:00:34.580 D Earpiece available
  15:00:34.598 D Speakerphone available
  15:00:34.598 D Available AudioDevice list updated: [BluetoothHeadset(name=Jabra Elite 4), Earpiece(name=Earpiece), Speakerphone(name=Speakerphone)]
  15:00:34.598 D Current user selected AudioDevice = null
  15:00:34.745 W Cannot activate when in the AudioActivated state
  15:00:34.746 D Bluetooth SCO disconnected
  15:00:35.624 D Bluetooth SCO connected
  Step 7: Disconnect the call

• 15:02:01.251 D AudioSwitch(1.2.0)
  15:02:01.252 D Preferred device list = [BluetoothHeadset, WiredHeadset, Earpiece, Speakerphone]
  15:02:01.289 D Redundant stop() invocation while already in the stopped state

Step 8: When receiving incoming calls and clicking the accept button, the audio comes through Bluetooth, but the Bluetooth option is not available in the UI:

• 15:03:19.267 D AudioSwitch(1.2.0)
  15:03:19.267 D Preferred device list = [BluetoothHeadset, WiredHeadset, Earpiece, Speakerphone]
  15:03:19.276 D Earpiece available
  15:03:19.276 D Speakerphone available
  15:03:19.277 D Available AudioDevice list updated: [Earpiece(name=Earpiece), Speakerphone(name=Speakerphone)]
  15:03:19.277 D Current user selected AudioDevice = null
  15:03:19.304 D Bluetooth Jabra Elite 4 connected
  15:03:19.309 D Device size 1 with device name: Jabra Elite 4
  15:03:19.309 D Earpiece available
  15:03:19.309 D Speakerphone available
  15:03:19.309 D Available AudioDevice list updated: [Earpiece(name=Earpiece), Speakerphone(name=Speakerphone)]
  15:03:19.309 D Current user selected AudioDevice = null
  15:03:19.309 D Bluetooth SCO connected
  15:03:22.133 W Cannot deactivate when in the Disconnected state

Sometimes Logcat observation:

• 15:00:58.065 D Scheduled bluetooth sco job
  15:00:58.073 D Bluetooth disconnected
  15:00:58.073 D Headset state changed to Disconnected
  15:00:58.094 D Attempting to disable bluetooth SCO
  15:00:58.103 D Headset state changed to Connected
  15:00:58.746 D Attempting to disable bluetooth SCO
  15:00:59.250 D Attempting to disable bluetooth SCO
  15:00:59.759 D Attempting to disable bluetooth SCO
  15:01:00.269 D Attempting to disable bluetooth SCO
  15:01:00.777 D Attempting to disable bluetooth SCO
  15:01:01.287 D Attempting to disable bluetooth SCO
  15:01:01.794 D Attempting to disable bluetooth SCO
  15:01:02.304 D Attempting to disable bluetooth SCO
  15:01:02.812 D Attempting to disable bluetooth SCO
  15:01:03.319 D Attempting to disable bluetooth SCO
  15:01:03.832 E Bluetooth sco job timed out
  java.util.concurrent.TimeoutException
  at com.twilio.audioswitch.bluetooth.BluetoothScoJob$BluetoothScoRunnable.run(BluetoothScoJob.kt:55)
  at android.os.Handler.handleCallback(Handler.java:959)
  at android.os.Handler.dispatchMessage(Handler.java:100)
  at android.os.Looper.loopOnce(Looper.java:232)
  at android.os.Looper.loop(Looper.java:317)
  at android.app.ActivityThread.main(ActivityThread.java:8592)
  at java.lang.reflect.Method.invoke(Native Method)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:580)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:878)
  15:01:03.832 D Headset state changed to AudioActivationError
  15:01:03.833 D Canceled bluetooth sco job

AudioSwitch Version

• Version: 1.2.0

Android Device (please complete the following information):

• Device: Pixel 7 & Samsung
• API Version: 34

Screenshots: Audio is coming via BT

My Observation and logs based on steps
There are two options to disconnect the call: from the main UI and the notification drawer. The issue typically occurs when I disconnect the call via the notification drawer but the code is same in both cases.

Code snippet related audio switch:

override fun onConnected(call: Call) {
            _audioSwitch.activate()
            mCallListener?.onConnected(call)
            updatedUserConferenceJoinedStatus(isJoined = true)
        }

VoiceCallService:

override fun onDestroy() {
        Timber.d("Service on destroy>>>>>>>>>>>>>>>>>>>>>>>>>>>ready to stop audio service")
        stopAudioService()
        disconnectCall(true)
        mCallServiceInstance = null
        super.onDestroy()
    }

Audio Switch Initialization:
_audioSwitch = AudioSwitch(applicationContext, loggingEnabled = true)

[tech-ajit-mob]

Hi Team,
Have you had a chance to review this issue?

[ocarevs]

Hi @tech-ajit-mob to clarify, in the initial steps 1-5, bluetooth is connected, but does not appear in the list of available devices, only after reconnecting the BT device it becomes listed? And then when you make a second call (while bluetooth is connected and active) then the BT device is missing in the device list again, is that correct?

[ocarevs]

Are you using BluetoothHeadsetConnectionListener to see bluetooth related callbacks?

[tech-ajit-mob]

Are you using BluetoothHeadsetConnectionListener to see bluetooth related callbacks?

Yes, I was using it to get status only.

[tech-ajit-mob]

Hi @tech-ajit-mob to clarify, in the initial steps 1-5, bluetooth is connected, but does not appear in the list of available devices, only after reconnecting the BT device it becomes listed? And then when you make a second call (while bluetooth is connected and active) then the BT device is missing in the device list again, is that correct?

@ocarevs
Reply: Yes, that's correct. However, what's surprising is that although the Bluetooth (BT) is connected and audio is coming through it, the BT device doesn't appear in the list. You can also see this in the logs.

[ocarevs]

@tech-ajit-mob We are investigating this issue. One question, have you tried our Voice quickstart, do you experience the same issue with quickstart?

[tech-ajit-mob]

@ocarevs sorry for the delayed response due to festive season
I haven't tried with Voice quickstart . I will try to reproduce with quickstart.