DFPlayer Mini didn't working anymore

Projects General Guidance
7

This post has just crossed with yours:

I've used both a DFRobot DFplayer Mini and a pure SD card reader in my tests recently. The test I gave you to try was actually for a pure SD card reader.

My suggestion is this:

  1. Format the SD card again (quick format)
  2. Create 1 new folder on the SD card called mp3
  3. Rename BGSOUND.MP3 in windows to 0001.mp3
  4. copy 0001.mp3 to the folder mp3 on the SD card.

So, on the SD card you now have 1 folder called mp3 containing one file called 0001.mp3 and try with that.
Maybe use the example code here and modify as required: Arduino Application - Test DFPlayer Mini MP3 Module - DFRobot

Are you using the Windows encrypting file system on your PC ? If you do, copied encrypted fiels won't work on the player.

I did find this DFPlayer_Mini_mp3/DFPlayer Mini Manual.pdf at master · Arduinolibrary/DFPlayer_Mini_mp3 · GitHub where note 6 at the end talks vaguely of 3.3 volt pins. A Uno is 5volt.