Bluetooth, A2DP, AVRC, Audio Source and Sink Exercise → Connecting Bluetooth module as Bluetooth Speaker to Bluetooth Module as Cellphone.
A2DP, Audio Source and Sink
Practice using a Bluetooth module as an A2DP Source and another module as a sink device.
1. Test System Configuration
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| A2DP Source | A2DP Sink | ||
Profile Example
| Decimal | PBAP | HID | AVRCP | A2DP | HFP | GATT | SPP | BT Role | ||||
| TRGT | CTRL | SRC | SNK | AG | HF | CLNT | SVR | |||||
| B10 | B09 | B08 | B07 | B06 | B05 | B04 | B03 | B02 | B01 | B00 | ||
| 11 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | HF |
| 19 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | AG |
| 163 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | Sink |
| 323 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | Source |
| 117 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | Sink&HF |
| 339 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | 1 | Source&AG |
2. Command and Response Sequence
| NO | Command | Response | Description |
| Step1: Setting-up A2DP-Source | |||
| 1 | AT+COD=5A020C | OK | Set the device type is the mobile phone(Source) |
| 2 | AT+I2SCFG=0 | OK |
Set the audio output to Analog (BT 1036 built-in CODEC version is required). If the module recognizes codec successfully, feedback +CODEC=ID is received |
| 3 | AT + PROFILE =323 |
OK +DEVSTAT=0 +PWRSTAT=1 +SPPSTAT=1 +VER=BT955,V2.7.0,20220810 +PROFILE=321 +A2DPSTAT=1 +AVRCPSTAT=1 +DEVSTAT=1 +DEVSTAT=3 |
Turn on A2DP source
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| Step2: Setting-up A2DP Sink | |||
| 5 | AT+COD=240404 | OK | |
| 6 | AT+I2SCFG=0 | OK | |
| 7 | AT+AVRCPCFG=0 | OK | |
| 8 | AT+PROFILE=163 |
OK +GATTSTAT=1 [+A2DPSTAT=1 +AVRCPSTAT=1 +SPPSTAT=1 +VER=FSC-BT80X,V4.3.4,20210625 +DEVSTAT=7 |
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| Step3: Paring Sink with Source | |||
| 8 |
Source Side Command AT+SCAN=1 |
OK +SCAN=1,-95,0,DC0D30507012,FSC-BT80X,240404 +SCAN=2,-63,0,AC8995D9D1C4,BeoSound 1_27168461,040418 |
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| 9 |
Source Side Command AT+A2DPCONN=Target ex) AT+A2DPCONN=DC0D30507012 |
Source Side Response OK +A2DPSTAT=2 +DEVSTAT=3 +PAIRREQ=952607,DC0D30507012,FSC-BT80X +PAIRED=0,DC0D30507012,FSC-BT80X +A2DPSTAT=3 +A2DPDEV=DC0D30507012,FSC-BT80X +DEVSTAT=1 +A2DPSTAT=5 +AUDMODE=1 +AVRCPSTAT=3 +PLAYSTAT=1 |
When A2DP Sink is connected, Audio signal from Mic of Source will be passed to the sink.
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Sink Side Response +PAIRED=DC0D30001C09 +A2DPSTAT=2 +A2DPSTAT=3 +DEVSTAT=5 +A2DPDEV=DC0D30001C09,FSC-BT955-1C09 +A2DPSTAT=4 +AVRCPSTAT=3 +PLAYSTAT=1 |
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| 10 |
Source Side Command AT+AUDROUTE=1 |
+AUDROUTE=1 OK +PLAYSTAT=1 +A2DPSTAT=5 +AUDMODE=1 |
Set Audio Path through A2DP |
WiFi IoT Module
Bluetooth Module
5G/LTE/CAT-M1/NB-IoT
