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# `dfplayer_mini` example

## What the example does

Initializes DFPlayer Mini over UART and plays `/MP3/0001.mp3`.
Every second it logs whether the module is playing (via BUSY pin).

## Wiring

| ESP32 pin | DFPlayer Mini |
|-----------|---------------|
| GPIO17 (TX) | RX |
| GPIO16 (RX) | TX |
| GPIO4       | BUSY (optional) |
| GND         | GND |
| 5V          | VCC |

Change pins in `main.c` if needed.

## SD card

- Format: FAT32
- Folders: `01` … `99` (two digits)
- Files: `001.mp3` … `255.mp3` (three digits)
- Example: `/01/001.mp3`

## Build (ESP-IDF 5.4.2)

В **новом** PowerShell:

```powershell
. C:\Espressif\tools\activate_idf_v5.4.ps1
cd examples\default
# если раньше собирали на IDF 6.x — обязательно почистить:
Remove-Item -Recurse -Force build -ErrorAction SilentlyContinue
idf.py set-target esp32
idf.py build
idf.py -p COMx flash monitor
```

Не мешай в одном окне IDF 5.4 и 6.0 — разные `activate_*.ps1`.