DFPlayer Mini MP3 Player Module

MP3 decoding board Built in amplifier Decoder TF card USB decoding player module DESCRIPTION :
Module highlights:
Ultra strong sound quality, onboard 2W mono amplifier (5V power supply can reach up to 3W), directly connected
to the speaker (recommended to be paired with 4 Ω 3W speaker), 3.5mm gold-plated headphone jack can be used to connect to headphones or external speakers. 

Equipped with MicroUSB power interface, it can be powered by mobile power or USB charger through
mobile phone data cable, or by 3.7V lithium battery and USB 5V power. 

Support TF card (mobile phone storage card) and USB playback mode. 

Equipped with horn terminals that do not require welding, making wiring convenient. 
The module design is convenient for modification. 

Schematic diagram: http://www.chipkingdom.com/upfile/201531917474080714.pdf

Product Overview:
1) Supports MP3 format, automatically plays when powered on, and updates the red LED indicator when playing. 
2) Supports USB flash drive (tested 32GB) and TF card (tested 16GB) playback modes; The default TF card mode is when powered on. If the TF card does not automatically jump to USB mode and both devices are installed, the playback mode can be manually set. Please refer to the button operation instructions for details. 
3) The buttons can adjust the up and down track switching, volume+-, pause/play, and mode switching. Please refer to the button operation instructions for details. 
4) You can set the "single/full track" cycle with the button, and the default full track cycle is when powered on. Press the "Repeat" button to change the cycle mode

Key operation instructions 
"Prev/V -" key: "Short press" to switch to "Previous" song, "Long press" to "Volume decrease"
"Next/v++" key: "Short press" to switch to "next" song, "Long press" to "volume increase" 
"P/P/Mode" key: "Short press" switches to "play/pause", "Long press" switches to USB flash drive, TF card "mode" selection 
"Repeat" key: "Short press" to cycle between "single/full track" (without long press function) 
Note: 1. Press and hold for approximately 2 seconds 

2. If using USB flash drive mode, it is recommended to supply 5V power. Some USB flash drives do not support 3.7V power supply.

Product specification parameters Power supply range: 3.7~5.5V 
Product size: 45mm * 36mm

 

Key Applications🔹
Arduino voice and sound prompt systems
Embedded sound effects and alert tones
Interactive toy and prop audio playback
Alarm and doorbell sound systems
Raspberry Pi and ESP32 audio projects

Why Choose This Module?🔹
Ultra-compact MP3 and WAV player
UART serial control interface
MicroSD card support (up to 32 GB)
Onboard speaker output (3 W)
Folder-based audio file organisation
Wide compatibility with Arduino libraries

Technical Specifications🔹
Supported Formats: MP3, WAV
Interface: UART (Serial TTL)
Storage: MicroSD (FAT16/FAT32, up to 32 GB)
Speaker Output: Up to 3 W (built-in amplifier)
Supply Voltage: 3.2 V – 5 V DC
Baud Rate: 9600 bps

What's Included🔹
1 × DFPlayer Mini MP3 Player Module

Pro Tip🔹
Add a 1 k resistor on the TX line between the Arduino and DFPlayer Mini to prevent communication errors caused by voltage level💡 Ω
differences.

Note:⚠️
Format your MicroSD card to FAT32 and name folders and files using the DFPlayer naming convention (e.g., /01/001.mp3) for reliable
playback.