This is a work-in-progress project.


Build the ultimate MP3 player - ultimate, becuase you might not want to buy any other mp3 player anymore!

Let’s see the components needed:

  • Attiny85
  • Dfplayer

Ok, I am a cheater with this Dfplayer-thing, but don’t worry, it won’t be so easy. We will do it step by step.

  1. Learn programming Attiny85 (see this earlier post)
  2. Control Dfplayer with Attiny85
  3. Make it portable: use joule thief

Ok, so let’s do the thing.

Playing with DFplayer

Dfplayer uses an SD card to store music. It supports FAT16 , FAT32 file system, maximum support 32G of the TF card, support 32G of U disk, 64M bytes NORFLASH.

DFPlayer can work in 3 modes:

  1. serial
  2. AD KEY
  3. IO mode

Now, for our purposes use serial mode. In serial mode we can control DFPlayer with some sort of byte commands. It leads us quite quick to create a lib for it, but fortunately we can find many. Let’s see some! (In Arduino IDE: Tools -> Manage Libraries -> Search for DFPlayer) You should choose DFRobotDFPlayerMini.


DFPlayer pinout

Lets set up the following pinout:

(Nano) D11 - 1K Ohm resistor - RX
(Nano) D10 - TX
(Nano) GND - GND
(Nano) 5V - VCC
(Stereo Jack) R - SPK_1
(Stereo Jack) L - SPK_2
(Stereo Jack) GND - GND

Find code here: dfplayer_test.ino

Sketch uses 5356 bytes - not bad, we will have 8k in case of Attiny85.

(to be continued…)