https://github.com/eiffelpeter/esp32_a2dp_sink

upgrade my old 9th corolla car stereo (CQ-JS7180AAT) to support bluetooth a2dp
https://github.com/eiffelpeter/esp32_a2dp_sink

a2dp corolla esp-idf esp32

Last synced: about 1 month ago
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upgrade my old 9th corolla car stereo (CQ-JS7180AAT) to support bluetooth a2dp

• Host: GitHub
• URL: https://github.com/eiffelpeter/esp32_a2dp_sink
• Owner: eiffelpeter
• Created: 2025-09-23T08:22:24.000Z (9 months ago)
• Default Branch: master
• Last Pushed: 2025-09-25T06:31:11.000Z (9 months ago)
• Last Synced: 2025-10-06T02:24:43.452Z (9 months ago)
• Topics: a2dp, corolla, esp-idf, esp32
• Language: C
• Homepage:
• Size: 16.8 MB
• Stars: 0
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
The cheap a2dp module with serious pop-noise and can not mute FM radio.  

So I build this project which use esp32 + ti pcm5102.  

## Install esp-idf enviroment on ubuntu 22.04

[refer](https://docs.espressif.com/projects/esp-idf/en/release-v5.4/esp32/get-started/linux-macos-setup.html#)  

clone sdk, install toolchain and export path

```

git clone -b v5.4 --recursive https://github.com/espressif/esp-idf.git esp-idf-v5.4

cd esp-idf-v5.4/

./install.sh

. ./export.sh

```

##  build

1. clone this example and build  

```

git clone https://github.com/eiffelpeter/esp32_a2dp_sink.git

cd esp32_a2dp_sink

idf.py set-target esp32

idf.py build

```  

2. connect `esp-prog` to ubuntu usb, check `/dev/ttyUSB1` exist.  

3. connect `esp-prog` to esp32.  

4. Download and run `idf.py -p /dev/ttyUSB1 flash monitor`.  

5. open your phone to search bt and pair, then play music.  

6. If you want to listen FM radio, tund off bt on your phone.  

![IMAGE ALT TEXT HERE](./doc/iphone_search_bt.jpg)

## gpios 

| esp32 |          |

|-------|----------|

|  17   | I2S_LRCK |

|  18   | I2S_BCK  |

|  23   | I2S_DATA |

|  19   | mute     |

|  22   | led      |

| mute |                               |

|------|-------------------------------|

| high | unmute pcm5102, mute FM radio |

| low  | mute pcm5102, unmute FM radio |

## power regulator

![IMAGE ALT TEXT HERE](./doc/power_ldo.png)  

![IMAGE ALT TEXT HERE](./doc/power_source.jpg)

## pcm5102 config ( green )

![IMAGE ALT TEXT HERE](./doc/pcm5102_config.jpg)  

## esp32 and pcm5102 connection

![IMAGE ALT TEXT HERE](./doc/esp32_pcm5102_connection.jpg)  

## pcm5102 L/R audio to car stereo

![IMAGE ALT TEXT HERE](./doc/bt_audio_inject.png)  

## esp32 mute FM radio when a2dp streaming

![IMAGE ALT TEXT HERE](./doc/esp32_mute_radio.png)  

## connect esp32 to car stereo ( remove tape and cd player )   

![IMAGE ALT TEXT HERE](./doc/connect_esp32_to_car_stereo.JPG)  

## assemble in car with phone holder

![IMAGE ALT TEXT HERE](./doc/install_on_car.jpg)  

## Can Use ESP32-DevKit WROOM to develop.

![IMAGE ALT TEXT HERE](./doc/ESP32-DevKitC-WROOM.jpg)  

## Support more codec

you can refer [this](https://github.com/cfint/esp32-a2dp-sink) to develop.  

but it need more memory, have to use `WROVER` DevKit.  

## Reference

[link](https://github.com/espressif/esp-idf/issues/14795)