Bluetooth, A2DP, AVRC, Audio Source Exercise → Connecting Bluetooth Speaker or Bluetooth Hands-Free to Bluetooth Module
A2DP, Audio Source
Practice using Bluetooth module as an A2DP source and Hands-free product as a sink device.
Note. A source must have an audio encoder and A2DP audio channel is uni-directional..
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,V2.7.0,20220922 +PROFILE=321 +A2DPSTAT=1 +AVRCPSTAT=1 +DEVSTAT=1 +DEVSTAT=3 |
Turn on A2DP(Source), AVRCP(Target)
Note. if the module does not support the corresponding function, the result bit value may be different from the setting value. |
| Step2: Pairing Hands-Free to A2DP Source | |||
| Set hands-free into Pairing Mode |
Switch BT hands-free or speaker to pairing mode |
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| AT+SCAN=1 |
AT+SCAN=1 +DEVSTAT=1 +DEVSTAT=9 OK +SCAN=1,-88,0,8BEE15D417EC,MABT181,340404 +SCAN=2,-88,0,AC8995D9D1C4,BeoSound 1_27168461,040418 [+SCAN=E +DEVSTAT=1 +DEVSTAT=3 |
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| 5 |
AT+A2DPCONN= Target ex) AT+A2DPCONN=8BEE15D417EC |
OK +A2DPSTAT=2 +A2DPSTAT=3 +A2DPDEV=8BEE15D417EC,MABT181 +DEVSTAT=1 +AVRCPSTAT=3 +PLAYSTAT=2 |
Connect Target via A2DP
Using Hands-free as a BT speaker, That is S2DP Sink. |
| 6 | AT+AUDROUTE=1 |
+AUDROUTE=1 OK +PLAYSTAT=1 +A2DPSTAT=5 +AUDMODE=1 |
Set audio path through A2DP |
| Step3: Play Music on the Bluetooth Module → or Input voice via MIC on the EVB Kit of Feasycom | |||
WiFi IoT Module
Bluetooth Module
5G/LTE/CAT-M1/NB-IoT
