MP3 Player Project

Project Idea

This project aims to create a Bluetooth enabled MP3 player using the ESP32, with the following features:

• SD card storage for MP3 files
• Bluetooth audio output to earbuds/headphones
• Wifi Access point for configuring bluetooth device MAC address and other settings
• Physical controls (subject to change):
  • Power switch (on/off)
  • Play/pause button
  • Next track button
  • Previous track button
  • Volume up button
  • Volume down button

Project Structure

This project uses the ESP IDF and FreeRTOS for real time operations. The project is organized with a CMake based build system and follows the standard ESP IDF project structure.

Building and Flashing Firmware

Hardware versions will eventually be tracked and instructions may change. The current instructions assume possession of an ESP32 devboard for prototyping.

1. Setup esp-idf toolchain.
   • It is probably a good idea to add the get_idf command to your shell.
2. In the root of the repository, run get_idf if you haven't already.
   • If sdkconfig is missing, you may need to run:
     • idf.py set-target esp32
     • idf.py menuconfig
3. From inside the firmware/ directory:
   • Run idf.py build
   • Run idf.py -p <serial_port> flash monitor to flash and monitor subsequent output
   • Exit the monitor via ctrl-[

Architecture

Changes to the project architecture should eventually be documented under the hardware/ directory.

• v0 [prototype] (ESP32 + spi-SD)