Compact and affordable MP3 playback module with built-in amplifier, ideal for embedded audio projects. Supports direct speaker output and serial control via microcontrollers like Arduino or ESP32.

Specifications:

• Operating Voltage: 3.2V – 5.0V
• Audio Formats: MP3, WAV, WMA
• Storage Support: MicroSD (TF) card up to 32GB (FAT16/FAT32)
• Output Power: 3W (4Ω speaker @ 5V)
• Communication: UART (9600 baud)
• Dimensions: 22mm × 20mm × 3.5mm
• DAC Output: 24-bit, SNR 85dB, Dynamic Range 90dB

Features:

• Direct speaker drive with onboard amplifier
• Serial, I/O, and ADKEY control modes
• Supports up to 100 folders, each with 255 audio files
• Adjustable volume (30 levels) and EQ (6 presets)
• Resume playback after interruption (e.g., advertising sound)
• Compatible with Arduino, ESP32, Raspberry Pi, and more

NOTE: When connecting this module to an Arduino board with 5V TTL levels, such as the UNO, MEGA, or similar, ensure the Rx pin is protected using a voltage divider or level shifter to prevent damage

Tutorial: DFPlayer Mini