DF Mini Player

The DFPlayer Mini is a compact and low-cost MP3 audio player module designed for embedded applications. It supports direct playback of audio files from a micro SD card and can be easily controlled using UART serial commands or simple push buttons. With a built-in audio amplifier, the DFPlayer Mini can directly drive a small speaker, making it ideal for Arduino, ESP32, Raspberry Pi, and other microcontroller-based projects.

This module is widely used in DIY electronics, interactive projects, voice prompts, alarms, toys, and automation systems due to its simplicity, reliability, and small form factor.

Key Features

• Supports MP3 and WAV audio formats

• Built-in 3W mono audio amplifier

• Plays audio directly from micro SD / TF card (up to 32GB)

• UART serial control (9600 baud default)

• Can also be controlled using standalone push buttons

• Supports FAT16 and FAT32 file systems

• Adjustable volume with 30 levels

• Small size, lightweight, and low power consumption

• Supports playback by file number or folder

Technical Specifications

• Operating Voltage: 3.2V – 5V DC

• Supported Audio Formats: MP3, WAV

• Audio Output: 3W (4Ω speaker)

• Storage: Micro SD / TF card (max 32GB)

• Communication: UART (TTL Serial)

• Default Baud Rate: 9600 bps

• File System: FAT16 / FAT32

• Dimensions: Approx. 22mm × 30mm

Applications

• Arduino and microcontroller audio projects

• Voice announcement systems

• Talking clocks and alarms

• DIY toys and sound effects modules

• Home automation voice alerts

• Robotics sound output

• Interactive art installations

• Smart doorbells and notification systems

Pin Functions (Overview)

• VCC – Power supply (3.2V–5V)

• GND – Ground

• TX / RX – UART serial communication

• SPK1 / SPK2 – Speaker output

• DAC_L / DAC_R – Line-level audio output

• IO1 / IO2 – Button control inputs

Package Includes

• 1 × DFPlayer Mini MP3 Audio Module

(Micro SD card, speaker, and connecting wires are not included)

Compatibility

• Arduino UNO / Nano / Mega

• ESP8266 / ESP32

• Raspberry Pi (via UART)

• STM32, PIC, AVR, and other microcontrollers