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:PrimaryBus:USB BD Address:00:0E:8E:76:00:55ACL
MTU:1024:8SCO MTU:50:8UP RUNNING PSCAN RX
bytes:810924acl:982sco:18885events:670errors:0**TX
bytes:528349acl:530sco:10271commands:108errors:111**Features:0xff0xfe0x8f0xfe0xd80x3f0x5b0x87Packettype:DM1
DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3 Linkpolicy:RSWITCH HOLD SNIFF
Linkmode:SLAVE ACCEPT Name:mydevice
Class:0x2c041cServiceClasses:Rendering,Capturing,AudioDeviceClass:Audio/Video,PortableAudioHCI
Version:4.2(0x8)Revision:0x0LMP
Version:4.2(0x8)Subversion:0x25aManufacturer: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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