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On 22.03.19 05:33, Mohammed Sha wrote:
Hi All,
I am attempting to implement hands-free telephony on my
board, I successfully connected my android phone to the
board via bluetooth module in phone and media audio sharing
mode.
You should consider using ofono to connect your phone to the PC.
It has all the
telephony functions you need and it works well together with PA.
See here
for a short introduction:
https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/Bluetooth/
I was able to play media files via bluetooth by this. But
when a call connected the bluetooth speaker works properly,
i.e. I can hear what is said on the Mobile Phone, but audio
is not transmitted from Board to Mobile Phone is not heard (
I guess there is some error in getting the data from mic or
in transmitting data from bluetooth device). I get the
following log message keeps appearing many times as soon as
a call is initiated
"***Bluetooth: hci0 SCO packet for unknown connection handle 0***
***Bluetooth: hci0 sending frame failed (-27)***
***Bluetooth: hci0 sending frame failed (-27)***"
This looks like an error from the bluetooth stack, probably
pulseaudio
cannot correct it. I experienced problems with some Bluetooth
dongles,
have you tried another one?
The microphone on the phone is also not functioning(after
bluetooth connection is established).
Also in *hciconfig -a* it is found as follows
hci0: Type: Primary Bus: USB
BD Address: 00:0E:8E:76:00:55 ACL MTU: 1024:8 SCO MTU: 50:8
UP RUNNING PSCAN
RX bytes:810924 acl:982 sco:18885 events:670 errors:0
**TX bytes:528349 acl:530 sco:10271 commands:108 errors:111**
Features: 0xff 0xfe 0x8f 0xfe 0xd8 0x3f 0x5b 0x87
Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
Link policy: RSWITCH HOLD SNIFF
Link mode: SLAVE ACCEPT
Name: mydevice
Class: 0x2c041c
Service Classes: Rendering, Capturing, Audio
Device Class: Audio/Video, Portable Audio
HCI Version: 4.2 (0x8) Revision: 0x0
LMP Version: 4.2 (0x8) Subversion: 0x25a
Manufacturer: Qualcomm
How can I solve this and implement proper hands-free
telephony?
The Bluetooth device is connected via USB interface, Below is
the device package configuration,
pulseaudio
--version
pulseaudio 11.1
bluetoothctl --version
bluetoothctl: 5.49
ofonod --version
1.22
The steps I followed to setup connection are as follows
$ hciconfig hci0 up
$ pactl list sources short
$ pactl list sinks short
$ bluetoothctl
agent on
scan on
scan off
pair <address>
connect<address>
--
Thanks
& Regards
Mohammed Sha Ebrahim
VVDN Technologies Pvt.Ltd
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