BluetoothSerial: set COD to be compatible with macOS (espressif#1304) (espressif#1556)

Author: gohai

libraries/BluetoothSerial/src/BluetoothSerial.cpp

@@ -136,6 +136,16 @@ static bool _init_bt(const char *deviceName)
  }
 esp_bt_dev_set_device_name(deviceName);
 
+// the default BTA_DM_COD_LOUDSPEAKER does not work with the macOS BT stack
+esp_bt_cod_t cod;
+ cod.major = 0b00001;
+ cod.minor = 0b000100;
+ cod.service = 0b00000010110;
+if (esp_bt_gap_set_cod(cod, ESP_BT_INIT_COD) != ESP_OK){
+log_e("%s set cod failed\n", __func__);
+returnfalse;
+ }
+
 returntrue;
 }