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Troubleshooting GStreamer Audio Pipeline for HFP/HSP Bluetooth Connection on Raspberry Pi

Hello Guys
I have another HFP/HSP question

I have to connect a phone to a computer to Tx/Rx the phone’s audio. Using bluetooth, there are 2 option-> HSP and HFP. I thought of connecting my phone to my RPi using bluetooth, making my RPi mimic a HFP HF while the phone as usual be a HFP AG.
On my RPi(with a external BT dongle) i was able to successfully connect with the Phone and was able to detected as a Headset on my phone.
But now comes my blocker.
There are no source or sink to where i could attach my gstreamer pipeline.

  1. melta101#0000

    this is the output of my pacmd list-cards

    index: 1
    name:
    driver:
    owner module: 22
    properties:
    device.description = “melphone”
    device.string = “2C:BE:EB:8B:F2:D7”
    device.api = “bluez”
    device.class = “sound”
    device.bus = “bluetooth”
    device.form_factor = “phone”
    bluez.path = “/org/bluez/hci0/dev_2C_BE_EB_8B_F2_D7”
    bluez.class = “0x5a420c”
    bluez.alias = “melphone”
    device.icon_name = “audio-card-bluetooth”
    bluetooth.codec = “CVSD”
    profiles:
    a2dp_source: High Fidelity Capture (A2DP Source) (priority 20, available: no)
    handsfree_audio_gateway: Handsfree Audio Gateway (HFP) (priority 10, available: unknown)
    off: Off (priority 0, available: yes)
    active profile:
    sinks:
    bluez_sink.2C_BE_EB_8B_F2_D7.handsfree_audio_gateway/#1: melphone
    sources:
    bluez_sink.2C_BE_EB_8B_F2_D7.handsfree_audio_gateway.monitor/#1: Monitor of melphone
    bluez_source.2C_BE_EB_8B_F2_D7.handsfree_audio_gateway/#2: melphone
    ports:
    phone-output: Phone (priority 0, latency offset 0 usec, available: unknown)
    properties:

    phone-input: Phone (priority 0, latency offset 0 usec, available: unknown)
    properties:

  2. ke7c2mi#0000

    Btw @melta101 I cant remember what the problem was but I set a pi up in my house with the stereo as an audio sink and it was an absolute pain in the ass to get it working right, I definitely needed to mess about with things to get the audio part working at all.. then there was a bunch more faf making it work after a reconnection.. if I get a chance I’ll see what the config on that pi is but currently very far from computer πŸ€“

  3. melta101#0000

    what seems to be the way
    is bluez + pulseaudio for now

    But the above only works with Headset(only A2DP profile) quite good ngl (include aptx HD)

    My mobile is able to detect my rpi, but upon connection[I am able to telephony control], there seems to be no sink/source to interact with it

  4. melta101#0000

    I feel you at the ending
    Now a days
    i just connect all my SBC/ FPGA boards with a ethernet Hub and leave it be
    maybe once of while clean it.

  5. melta101#0000

    did a reboot
    and
    now the virtual sinks/sources are missing

    Card #105
    Name: bluez_card.2C_BE_EB_8B_F2_D7
    Driver: module-bluez5-device.c
    Owner Module: n/a
    Properties:
    api.bluez5.address = “2C:BE:EB:8B:F2:D7”
    api.bluez5.class = “0x5a420c”
    api.bluez5.connection = “disconnected”
    api.bluez5.device = “”
    api.bluez5.icon = “phone”
    api.bluez5.path = “/org/bluez/hci0/dev_2C_BE_EB_8B_F2_D7”
    bluez5.auto-connect = “[ hfp_hf hsp_hs a2dp_sink ]”
    bluez5.profile = “off”
    device.alias = “melphone”
    device.api = “bluez5”
    device.bus = “bluetooth”
    device.description = “melphone”
    device.form_factor = “phone”
    device.icon_name = “audio-card-bluetooth”
    device.name = “bluez_card.2C_BE_EB_8B_F2_D7”
    device.product.id = “0x1200”
    device.string = “2C:BE:EB:8B:F2:D7”
    device.vendor.id = “bluetooth:0046”
    media.class = “Audio/Device”
    factory.id = “14”
    client.id = “34”
    object.id = “72”
    object.serial = “105”
    Profiles:
    off: Off (sinks: 0, sources: 0, priority: 0, available: yes)
    audio-gateway: Audio Gateway (A2DP Source & HSP/HFP AG) (sinks: 0, sources: 0, priority: 256, available: yes)
    Active Profile: audio-gateway

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