Not getting any audio on the headset, neither an error in the serial monitor

[d3mac123]

Hi,

I am using the simple code below with my m5stack ATOM Matrix board. It compiles with no errors, nor does the Serial Monitor show anything. However, it is not playing anything on my BOSE QC45 headphones. Am I missing anything?

#include "BluetoothA2DPSource.h"
#include "piano8bit.h"

BluetoothA2DPSource a2dp_source;
SoundData *data = new OneChannel8BitSoundData((int8_t*)piano8bit_raw, piano8bit_raw_len);

void setup() {
  a2dp_source.set_auto_reconnect(true);
  a2dp_source.start("BOSE QC45");  
  a2dp_source.set_volume(20);
  a2dp_source.write_data(data);
}

void loop() {
  // to prevent watchdog in release > 1.0.6
  delay(10);
}

[pschatzmann]

I guess you just forgot to activate the ESP32 logging in the Arduino Tools menu

[d3mac123]

Set the Core Debug Level to Debug and I am getting the following messages. I guess the headphones and the board are not connecting for some reason. Ideas?

[ 13496][D][BluetoothA2DPSource.cpp:468] bt_app_gap_callback(): [BT_AV] bt_app_gap_callback evt 1
[ 13497][I][BluetoothA2DPSource.cpp:483] bt_app_gap_callback(): [BT_AV] Device discovery failed, continue to discover...
[ 13508][D][BluetoothA2DPSource.cpp:468] bt_app_gap_callback(): [BT_AV] bt_app_gap_callback evt 1
[ 13513][I][BluetoothA2DPSource.cpp:487] bt_app_gap_callback(): [BT_AV] Discovery started.
[ 20614][D][BluetoothA2DPSource.cpp:269] bt_app_work_dispatch(): [BT_API] bt_app_work_dispatch event 0xff00, param len 0
[ 20614][D][BluetoothA2DPSource.cpp:319] bt_app_task_handler(): [BT_API] bt_app_task_handler, signal: 0x1, event: 0xff00
[ 20624][I][BluetoothA2DPSource.cpp:666] bt_app_av_sm_hdlr(): [BT_AV] bt_app_av_sm_hdlr state APP_AV_STATE_DISCOVERING, evt 0xff00
[ 26313][D][BluetoothA2DPSource.cpp:468] bt_app_gap_callback(): [BT_AV] bt_app_gap_callback evt 1
[ 26313][I][BluetoothA2DPSource.cpp:483] bt_app_gap_callback(): [BT_AV] Device discovery failed, continue to discover...
[ 26324][D][BluetoothA2DPSource.cpp:468] bt_app_gap_callback(): [BT_AV] bt_app_gap_callback evt 1
[ 26329][I][BluetoothA2DPSource.cpp:487] bt_app_gap_callback(): [BT_AV] Discovery started.
ͅ����, event: 0x0
[   593][D][BluetoothA2DPSource.cpp:565] bt_av_hdl_stack_evt(): [BT_AV] bt_av_hdl_stack_evt event: 0
[   602][I][BluetoothA2DPCommon.cpp:288] set_scan_mode_connectable(): [BT_AV] set_scan_mode_connec a6le false

[pschatzmann]

You don't have any bluetooth devices which would be discoverable!

Are you sure that your headphones support A2DP and are not already connected to some other device ?

[d3mac123]

I am not sure about A2DP support. I thought any BT headset would be discoverable. I will try with other devices I have and see what happens.

[d3mac123]

All working fine now. Thank you so much Phil!