BC127 A2DP Sink and Source Confusion


#1

Hello,

I seem to be having a misunderstanding of the BC127 module or possibly just Bluetooth in general.

I would like to have the BC127 be a central hub for multiple Bluetooth speakers and a single phone connection and stream music from one phone to multiple Bluetooth speakers. Right now, I am trying to route the phone’s A2DP to the wireless speaker and I am having issues with this.

I can connect from my phone to the speaker without any problem and stream music to this speaker via Bluetooth without any problem.

In my log below, I have the BC127 auto-connecting and auto-advertising itself so I can speed up the process when I reset the module. I check the status and show my config too.

reset

Sierra Wireless Copyright 2018
Melody Audio V7.1
Build: 1526921906
Ready
OPEN_OK 10 A2DP 643409240349
OPEN_OK 11 AVRCP 643409240349
OPEN_OK 20 A2DP 84119E71A98C
OPEN_OK 21 AVRCP 84119E71A98C
AVRCP_PAUSE 21
AVRCP_STOP 21
OPEN_OK 23 HFP 84119E71A98C

status

STATE CONNECTED[2] CONNECTABLE[OFF] DISCOVERABLE[OFF] BLE[IDLE]
LINK 10 CONNECTED A2DP 643409240349 SUSPENDED SBC SRC 48000
LINK 11 CONNECTED AVRCP 643409240349 STOPPED
LINK 20 CONNECTED A2DP 84119E71A98C SUSPENDED SBC SNK 44100
LINK 21 CONNECTED AVRCP 84119E71A98C STOPPED
LINK 23 CONNECTED HFP 84119E71A98C IDLE NB
OK

route 10

OK
A2DP_STREAM_START 20
AVRCP_PLAY 21
AVRCP_PAUSE 21
A2DP_STREAM_SUSPEND 20

config

AUDIO=0 0
AUDIO_ANALOG=15 15 1 OFF
AUDIO_DIGITAL=0 44100 64 100A00 OFF
AUTOCONN=1
AUTO_DATA=OFF OFF
BALANCE=100 100
BATT_CONFIG=OFF 145 4250 1500 150
BC_SMART_CONFIG=68E3 28F0 89F7 D93C ON
BEACON_DATA=0 00 11 22 33 44 55 66 77 88 99 AA BB CC DD EE FF 04 D2 16 2E EE
BLE_CONFIG=0 ON 80 ON
BLE_CONN_PARAMS=128 12 24 40 0 400 100 400 400 64 400 400
BT_STATE_CONFIG=0 0
BT_VOL_CONFIG=A 60 10 1
CLASS_1=OFF
CMD_TO=20
COD=240404
CODEC=0 OFF
DEEP_SLEEP=OFF
DEVICE_ID=0001 0002 0003 0004 0005 0006 0007 0008
ENABLE_BATT_IND=ON
ENABLE_LED=ON
ENABLE_SPP_SNIFF=OFF 0 0 0 0 0
GPIO_CONFIG=ON 0
HFP_CONFIG=OFF ON OFF OFF OFF OFF
HIGH_SPEED=OFF OFF
LOCAL_ADDR=20FABB088DFA 4176FFB762C0
MAX_REC=2
MM=OFF OFF 0 OFF OFF OFF OFF OFF
MUSIC_META_DATA=ON
MUSIC_OLD_AVRCP=OFF
NAME=BC127
NAME_SHORT=BC088DFA
PIN=0000
PROFILES=2 0 2 0 2 3 2 1 0 0 2 0
REMOTE_ADDR=000000000000
SPP_UUID=00 00 11 01 00 00 10 00 80 00 00 80 5F 9B 34 FB
SSP_CAPS=3
TWS_CONFIG=OFF 1 2
UART_CONFIG=9600 OFF 0
USB_HOST=OFF
VREG_ROLE=1
OK

I have noticed that the frequency of the speaker and the phone are different for A2DP communication. Will this affect anything?

I also notice that my phone is labeled as a sink and the speaker is labeled as a source. Presently I feel that this is the issue. How could this be changed?

Is there anything else that I am missing that could cause an issue?

Thanks,
Steven.