View source for DFPlayer Mini MP3 Player

==References==
* https://wiki.dfrobot.com/DFPlayer_Mini_SKU_DFR0299
* https://www.electronics-lab.com/project/mp3-player-using-arduino-dfplayer-mini/
* https://github.com/DFRobot/DFPlayer-Mini-mp3

==Specs==
# Supports sampling rates (KHz): 8 / 11.025 / 12/16 / 22.05 / 24/32 / 44.1 / 48 
# 24-bit DAC output, support range: 90dB, SNR support: 85dB
# Fully supports FAT16, FAT32 file system, maximum support 32G TF card, support U disk to 32G, 64M bytes NOR FLASH
# A variety of control modes are available. IO control, serial port, AD button control mode
# Radio spots language function, you can pause the background music being played. Advertising finished playing background sound continues to play back
# The audio data is sorted by folder, supports up to 100 folders, folders can be assigned to every 255 Tracks
# 30 level adjustable volume, six adjustable EQ
# DC: 3.3-5v
==Device==
<center>
[[File:DPMiniplayer pin map.png]]
</center>

==Pinout==
{| class="wikitable"
! Pin number !! Pin name !! Function !! Remark
|-
| 1 || VCC || Module power input || 3. 3V—5V, 5V is recommended, do not exceed 5. 2V
|-
| 2 || RX || UART serial data input ||  
|-
| 3 || TX || UART serial data output ||  
|-
| 4 || DAC_R || Audio output right channel || Drive headphones, amplifier
|-
| 5 || DAC_L || Audio output left channel || Drive headphones, amplifier
|-
| 6 || SPK2 || Connect small speaker || Drive less than 3W speakers
|-
| 7 || GND || Ground || Power ground
|-
| 8 || SPK1 || Connect small speaker || Drive less than 3W speakers
|-
| 9 || IO1 || Trigger port || Default previous song (long press volume down)
|-
| 10 || GND || Ground || Power ground
|-
| 11 || IO2 || Trigger port || Default next song (long press volume plus)
|-
| 12 || ADKEY1 || AD port 1 || The first song when triggered (long press cycle first song)
|-
| 13 || ADKEY2 || AD port 2 || Fifth track when triggered (long press cycle fifth track)
|-
| 14 || USB+ || USB+ DP || Connect U disk or USB port of computer
|-
| 15 || USB- || USB- DM || Connect U disk or USB port of computer
|-
| 16 || Busy || Playback status || With audio, output low. No audio, output high
|}

[[Category:Arduino]]