DFPlayer wont start playing on startup

Using Arduino Audio
1

The player only starts working when I press the 'Next' button. I want it to start playing straight after I turn it on. I included player.play(1); in the setup, but it won't work. Also I wanted to set the initial volume, but that doesn't work either. (player.volume(10);)

I have a folder called '01' and two files: 001.mp3 and 002.mp3 in that folder.

Here's the full code:

//-----------------------------------------------------------------------
//DFPlayer: Mini mp3 Player
//Library by: Angelo qiao: https://github.com/DFRobot/DFRobotDFPlayerMini
//-----------------------------------------------------------------------
#include "SoftwareSerial.h"
#include "DFRobotDFPlayerMini.h"
//---------------------------------------------------
SoftwareSerial softwareSerial(10, 11);
DFRobotDFPlayerMini player;
//===========================================================

void setup()
{
  pinMode(2,INPUT); pinMode(3,INPUT); pinMode(4,INPUT);
  pinMode(5,INPUT); pinMode(6,INPUT); pinMode(7,INPUT);
  pinMode(9,OUTPUT);
  //---------------------------------------------------
  softwareSerial.begin(9600);
  player.begin(softwareSerial);
  player.volume(10);
  player.play(1); 
}
//===========================================================
void loop()
{
  if(digitalRead(5) == HIGH) player.volumeUp();
  if(digitalRead(6) == HIGH) player.volumeDown();
  //---------------------------------------------------
  if(digitalRead(2) == HIGH)
  {
    delay(200); player.next();
  }
  //---------------------------------------------------
  if(digitalRead(3) == HIGH)
  {
    delay(200); player.previous();
  }
  //---------------------------------------------------
  if(digitalRead(4) == HIGH)
  {
    delay(200);
    digitalWrite(9, HIGH);
     player.pause();
    while(1)
    {
     
      if(digitalRead(4) == HIGH) {player.start(); break;}
    }
    digitalWrite(9, LOW);
  }
}
2

Since the Next button works, the DFplayer is up and running. The Arduino just can't communicate with it. The problem is likely in your wiring. Please show us a schematic. A clearly drawn pen and paper one is perfectly acceptable.

3

I'm using the arrangement below, but I swapped the 10k resistor in the RX line with a 1k one as the specs shows for the DFplayer. It didn't work with the 10k one. Also I didn't connect anything to the pin where a 'pause' LED supposed to be.

image
image1705×914 82 KB

4

Oh, you're not using the Next button on the DFplayer? So the Arduino can communicate with the DFplayer, just not at startup. Try adding a delay(2000); between player.begin(...) and player.volume(...). It may be that the DFplayer simply takes a bit longer to start up than the Arduino.

5

Then you have to specify the folder.
Your sketch as posted is structured for having everything in the root directory (no folder).

6

It looks like my file structure was the issue. I placed those files in the root folder, and it started working. Adding delay was a good idea too, but luckily it's not necessary.

Now the only issue is the pause button, as it's very fiddly and hard to operate, but I guess it's something to do with the timings.

Thanks both of you for the help.

7

the pause button is the easiest part:
define this in the beginning:
bool Pause = false;
and use that in the loop:

// pause/play Button
  if (button_b.released()) {
    if (busyState == LOW) {
      Pause = true;
      myDFPlayer.pause(); // pause if playing
      digitalWrite(LEDb, HIGH);
    }
    else {
      Pause = false;
      myDFPlayer.start(); // start if not playing
      digitalWrite(LEDb, LOW);
    }
  }

Attention: I use the busy pin of the player to check if playing or not. You can do that with a variable as well. Just reading the status of the player is not very reliable.

8

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