An ESP32 Based iPod type music player, can play music (.mp3) stored and given in an SD Card along with OLED display to show stats
An ESP32 (my favourite microcontroller) based music player - similar to an iPod, but DIY and made for a lot cheaper. Right now the current version of the firmware only includes wired headphones (via PCM5102a DAC module) but I plan to implement a Bluetooth A2DP sink and source so that it is different from a normal iPod.
- Wired: No wireless connectivity issues! No latency issues!
- SD Card: Update your SD card and it works without needing to update the firmware again.
- OLED Feedback: OLED display to show currently playing song and if it's paused or not.
- Physical control buttons: Control your sound using clicky Cherry MX Blue mechanical switches.
| PART | QUANTITY | Purpose |
|---|---|---|
| ESP32 | 1 | Main Processing unit |
| PCM5102a | 1 | Main I2S DAC |
| SPI SD Card Reader | 1 | To read the SD Card |
| Professional PCB | 1 | To house the electronics |
| OLED SSD1306 | 1 | To display some stats about the song |
| Mechanical switches | 3 | For audio controls |
Dependencies:
- https://github.com/pschatzmann/arduino-audio-tools (arduino-audio-tools)
- https://github.com/pschatzmann/codec-helix (codec-helix)
- https://github.com/adafruit/adafruit-gfx-library (adafruit-gfx-library)
- https://github.com/adafruit/adafruit_ssd1306 (adafruit_ssd1306)
This code runs a modified version of an this example code. I have added custom defined I2S and SPI pins (CS only for SPI) and added some graphics for OLED SSD1306 driver. I display the currently playing song on the OLED display and implement a simple logic to handle button presses to control the audio from the player class (please refer to arduino-audio-tools documentation for this) which include next-track, previous-track and pause (isActive)