INFORMATION
DFPlayer Mini is a small MP3 player module, ideal for playing music from a MicroSD, has different control modes, can work independently through buttons and a power supply, be used with a female USB Jack and have control by serial communication with its TX and RX pins. It is compatible with Arduino development boards or any other microcontroller that has UART ports.
It serves to develop different prototypes that allow playing audio in MP3 format. It is used to play audio autonomously with the help of an MCU and create alarm systems to give warnings.
 
In addition, it has an integrated 3W amplifier to directly connect a speaker. There is also an output for headphones and amplifier.
The module supports MP3 and WMV decoding and sample rates up to 48 kHz. The SD card supports FAT16, FAT32 up to 32GB with a maximum of 100 folders with every 1000 songs. The speaker and headphone jacks are connected to a 24-bit DAC with a dynamic range of up to 90dB.
SPECIFICATIONS AND FEATURES 
Model: MP3-TF-16P
Chip: MH2024K-16SS
Dimensions: 21 mm x 21 mm x 12 mm
Supply voltage: 5V DC
Logical voltage: 5V does not support 3.3V MCUs
Control Modes: I/O Control | Serial mode | AD button control
Adjustable volume of 30 levels
Supports sampling rates (KHz): 8/11.025/12/16/22.05/24/32/44.1/48
DAC output: 24-bit
Dynamic range: 90dB
SNR Support: 85dB
MicroSD: Not included. Supports Maximum 32GB
Horn: Not included. Supports a single 3W speaker not to exceed this parameter
File name must be numeral, not text
Power LED: No
Led indicator: Yes, when you start playing audio the led will turn on otherwise it will be off
Compatible with MCU: Ideal for Arduino boards and 5V logic MCU, it is advisable to independently power the mini player with an external source.
*Note: The mini mp3 player only works with boards with 5V logic, for boards that handle a 3.3V logic such as ESP32, NodeMCU and others, the module will not work properly, only use with MCUs and development boards that have 5V logic.