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

1. Supports sampling rates (KHz): 8 / 11.025 / 12/16 / 22.05 / 24/32 / 44.1 / 48
2. 24-bit DAC output, support range: 90dB, SNR support: 85dB
3. Fully supports FAT16, FAT32 file system, maximum support 32G TF card, support U disk to 32G, 64M bytes NOR FLASH
4. A variety of control modes are available. IO control, serial port, AD button control mode
5. Radio spots language function, you can pause the background music being played. Advertising finished playing background sound continues to play back
6. The audio data is sorted by folder, supports up to 100 folders, folders can be assigned to every 255 Tracks
7. 30 level adjustable volume, six adjustable EQ
8. DC: 3.3-5v

Device

Pinout

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