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.
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)***"
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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