The DFPlayer Mini is a compact and budget-friendly MP3 module designed for Arduino projects. It allows you to play audio files directly from a microSD card, making it ideal for DIY audio applications like alarms, voice prompts, or simple music players.

? Key Features

• Audio Formats Supported: MP3, WAV, WMA

• Sampling Rates: 8kHz to 48kHz

• Built-in 3W Mono Amplifier: Connects directly to a 4Ω or 8Ω speaker

• Storage: Supports microSD cards up to 32GB with FAT16/FAT32 file systems

• Control Modes: Serial (UART), I/O pins, and AD key control

• Volume Control: 30 levels

• Equalizer Settings: 6 presets

• Operating Voltage: 3.2V to 5V

• Size: 20mm x 20mm

? Wiring It Up

To connect the DFPlayer Mini to an Arduino (e.g., Uno or Nano):

1. Power: Connect the VCC pin to 5V and GND to ground.

2. Serial Communication:

   • Connect Arduino pin D2 to the module's RX pin (use a voltage divider if necessary).

   • Connect Arduino pin D3 to the module's TX pin.

3. Speaker: Connect a 4Ω or 8Ω speaker to the SPK1 and SPK2 pins.

Ensure to use a voltage divider (e.g., 1kΩ and 680Ω resistors) between Arduino D2 and the module's RX pin to protect the module from 5V logic levels.