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

Send a serial playback command

Use a 3.3 V logic-level UART controller. Insert the card and power the module before running the DFRobot library playback example. Add the 1 kΩ series resistor on the module receive line.

  • Controller transmit
    • Controller TX
  • Module receive
  • Module transmit
  • Common return
1 kΩ between Controller transmit and Module receiveController transmit1 kΩModule receive

Bench checks

  • Confirm the card is recognized before issuing the play command.
  • Check for a low BUSY signal during playback. Check wire polarity and the serial framing if there is no response.

DFRobot Arduino GetStarted example.

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

8 · SPK2

Bridge output · Outputs

Other side of the amplified speaker output. Keep both speaker leads isolated from ground.

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.