🎵 DFPlayer Mini MP3 Module — TF Card & U‑Disk Audio Voice Module for Arduino, Raspberry Pi, and Microcontrollers

The DFPlayer Mini is a compact, cost-effective MP3 audio module that can drive a speaker directly, making it ideal for embedded electronics projects, prototyping, and production. Use it as a standalone player with a battery, speaker, and buttons, or control it via UART serial from Arduino, Raspberry Pi, ESP32, STM32, and other microcontrollers.

🌟 Key Features

• Compact design — Small footprint for easy integration into enclosures and DIY builds.
• Flexible control modes — IO trigger, UART serial, and AD-key (analog button) control modes for versatile interfacing.
• Wide storage compatibility — Reads from TF (microSD) cards up to 32 GB and U‑Disk (USB flash drives) up to 32 GB; supports FAT16/FAT32 file systems.
• Direct speaker drive — Built‑in amplifier can drive a small speaker directly, simplifying your audio module design.
• Folder-based playback — Organize audio by folders; supports 100+ folders with up to 255 tracks per folder.
• Advertisement/insert playback — Interrupt background audio to play a prompt, then resume automatically.
• Fine audio control — 30 volume levels and 6 EQ presets for flexible sound tuning.
• High compatibility — Works with Arduino, Raspberry Pi, and most microcontroller modules with a serial interface.

⚙️ Technical Specifications

• Audio formats: MP3, WAV, WMA
• Sampling rates (kHz): 8 / 11.025 / 12 / 16 / 22.05 / 24 / 32 / 44.1 / 48
• DAC: 24‑bit output; Dynamic range ≈ 90 dB; SNR ≈ 85 dB
• Storage/file systems: FAT16, FAT32; supports 32 GB TF card and 32 GB U‑Disk
• Optional onboard flash: up to 64 MB NOR Flash (model dependent)
• Control modes: IO control, UART serial control, AD key control
• Folder/track indexing: >100 folders; up to 255 tracks per folder (folder‑based sorting)
• Volume/EQ: 30 volume steps; 6 EQ settings
• Insert/advertise playback: Supports interrupting background music and auto‑resume
• Speaker output: Onboard amplifier for direct speaker connection (SPK pins; typical 4–8 Ω speaker)
• Line out: Stereo DAC pins for external amplifier or mixer
• Serial interface: UART TTL, default 9600 bps; compatible with 3.3 V and 5 V logic
• Operating voltage: 3.2 V–5 V DC
• Indicators/utility pins: BUSY output pin for playback status
• Recommended use: Arduino projects, Raspberry Pi (via USB‑to‑UART or GPIO UART), and other electronics components ecosystems

🚀 Typical Applications

• Car navigation and voice prompts
• Highway transport inspection and toll station announcements
• Railway/bus station inspection voice prompts
• Power, communications, and financial service hall audio guidance
• Vehicle access control and verification prompts
• Border inspection channel voice prompts
• Multi‑channel warning tones or equipment operation guidance
• Electric sightseeing car driving notifications
• Mechatronics equipment failure auto‑alarm
• Firefighting voice alarms
• Automatic broadcast and scheduled/timed playback systems

🔌 Integration Tips for Arduino/Raspberry Pi

• Use UART serial (RX/TX) for reliable control; default baud rate 9600 bps.
• Power from a clean 3.3–5 V supply; decouple with local capacitors to minimize noise.
• For louder output, connect the DAC/line out to an external audio amplifier module.
• Organize files in folders and use numeric names for consistent indexing (e.g., 01/001.mp3).

📐 Product Size

Dimensions: 20 × 20 × 10 mm.

📝 Notes

Due to lighting and display differences, the item’s color may vary slightly from the images. Please allow a 1–2 cm deviation in measurements due to manual measurement.