IMPORTANT NOTE:

This is a slightly modified copy of MrBuddyCasino's ESP32_MP3_Decoder project. The code and this README doc has been modified to make the project set up compatible with the Embedded Adventures WRL-4001 Audio Development Board

ESP32 Web Radio

This is a simple web radio streamer. It connects to a web radio station via wifi, decodes the stream and plays the sound via I2S codec or to a speaker directly connected to the DAC pins.

Features:

• Decodes MP3 and AAC (Beta)
• Bluetooth Speaker mode

Required Software

Get the SDK:

git clone https://github.com/espressif/esp-idf.git
cd esp-idf
git submodule update --init

Set the IDF_PATH environment variable, and point it to this directory.

export IDF_PATH=/path/to/esp-idf

Download the toolchain from: https://github.com/espressif/esp-idf#setting-up-esp-idf You will need version 5.2.0. Add /path/to/xtensa-esp32-elf/bin to your PATH:

export PATH=/path/to/xtensa-esp32-elf/bin:$PATH

Configuration

The serial port and wifi credentials are configured using make. Type make menuconfig and

• configure your serial port in Serial flasher config submenu
• select Web Radio / Bluetooth Speaker submenu
  • configure wifi credentials
  • select audio output mode
  • activate / disable bt speaker mode
• 'save', then exit

You can edit the list of radio stations in the /main/playlist.pls playlist file.

Building

If this is the first time, initialize the submodules: git submodule init && git submodule update. Then, just type make all.

Flashing

Connect your serial cable and run 'make flash'. To see serial console output run 'make monitor'.

Controls

There is an option to connect a pushbutton to the WRL-4001 board, to GPIO4. This button allows you to advance to the next track in the playlist.

Bluetooth Speaker Mode

Enable Classic Bluetooth in Component config > Bluetooth > Bluedroid Bluetooth stack enabled > Classic Bluetooth, enable A2DP > A2DP ROLE config (SINK), then enable Bluetooth Speaker Mode via make menuconfig. After flashing, you should see a Bluetooth device called "ESP_SPEAKER". If you don't like that name, you can change it via menuconfig.

Known Issues

• Some AAC streams may not be playable

More Information

There is a thread over at the ESP32 forum: https://esp32.com/viewtopic.php?f=17&t=1026