Spark Logic

DFPlayer Mini MP3 module connection guide

DFPlayer Mini MP3 module DFR0299 module wiring guide with power, signal assignments, and bench checks.

DFR0299 module

16 contacts Current package

DFRobot · 20 × 20 mm · two rows of eight contacts

Power the module and prepare storage

Required

With the module off, insert a FAT16 or FAT32 microSD card containing one known MP3. Use a regulated 5 V supply for the bench example.

Bench checks

  • Measure 5 V at VCC before starting playback.
  • Keep one test track on the card to avoid ambiguity in playback order.

DFRobot DFR0299 documentation, Pinout and Work Mode

Connection scenarios

Connect a speaker and next-track switch

With the supply off, connect a small 8 Ω speaker rated for 3 W across the two speaker outputs. Add a normally-open switch between IO2 and ground.

Bench checks

  • Start with low volume. Briefly close the switch to select the next track.
  • Verify that neither speaker lead touches board ground.

DFRobot DFR0299 documentation, Pinout and Work Mode, I/O Mode. Speaker impedance and rating are bench choices.

DFR0299 module wiring map

Highlighted contacts are used in the required step or selected circuit. Select a contact to inspect it.

Top view. Identify the VCC end and match the board markings before wiring.
Selected pin details

1 · VCC

Supply input · Power

Use a regulated 3.2–5 V supply. The speaker stage can draw more current while playing.

DFRobot DFR0299 documentation, Pinout and Work Mode

Electrical limits · Pin in the reference

Models and documents

This guide follows the DFRobot DFR0299 module’s 16-contact pinout. Check the seller’s documentation for lookalike modules and different audio chips.

DFR0299
DFRobot DFPlayer Mini module.