Need Help With DfPlayerMini TF-16P

Hardware
1

Hi Everyone!

I am doing a school project that is due very soon, and I am using DfPlayerMini TF-16P, an Arduino Uno and 2 buttons. I was trying to make it so that when I push one button it asks one question, and when I push the other one it asks a different question. I was wondering if anyone could please make me code that would work for this project. I have tried the code below but the code is not working. The buttons don't work, and there is no sound. I have attached my wiring diagram below (sorry if it is bad, this is my first time creating a circuit schematic)

circuit
circuit700×480 7.72 KB 

#include "SoftwareSerial.h"
SoftwareSerial mySerial(10, 11);
# define Start_Byte 0x7E
# define Version_Byte 0xFF
# define Command_Length 0x06
# define End_Byte 0xEF
# define Acknowledge 0x00 //Returns info with command 0x41 [0x01: info, 0x00: no info]

# define ACTIVATED LOW

int buttonNext = 2;
int buttonPause = 3;
boolean isPlaying = false;



void setup () {

  digitalWrite(buttonPause, HIGH);
  digitalWrite(buttonNext, HIGH);

  mySerial.begin (9600);
  delay(1000);
  playFirst();
  isPlaying = true;


}



void loop () {

  if (digitalRead(buttonPause) == ACTIVATED)
  {
    if (isPlaying)
    {
      pause();
      isPlaying = false;
    } else
    {
      isPlaying = true;
      play();
    }
  }


  if (digitalRead(buttonNext) == ACTIVATED)
  {
    if (isPlaying)
    {
      playNext();
    }
  }
}

void playFirst()
{
  execute_CMD(0x3F, 0, 0);
  delay(500);
  setVolume(20);
  delay(500);
  execute_CMD(0x11, 0, 0);
  delay(500);
}

void pause()
{
  execute_CMD(0x0E, 0, 0);
  delay(500);
}

void play()
{
  execute_CMD(0x0D, 0, 0);
  delay(500);
}

void playNext()
{
  execute_CMD(0x01, 0, 1);
  delay(500);
}

void setVolume(int volume)
{
  execute_CMD(0x06, 0, volume); // Set the volume (0x00~0x30)
  delay(2000);
}

void execute_CMD(byte CMD, byte Par1, byte Par2)
// Excecute the command and parameters
{
  // Calculate the checksum (2 bytes)
  word checksum = -(Version_Byte + Command_Length + CMD + Acknowledge + Par1 + Par2);
  // Build the command line
  byte Command_line[10] = { Start_Byte, Version_Byte, Command_Length, CMD, Acknowledge,
                            Par1, Par2, highByte(checksum), lowByte(checksum), End_Byte
                          };
  //Send the command line to the module
  for (byte k = 0; k < 10; k++)
  {
    mySerial.write( Command_line[k]);
  }
}
2

What are the titles of the two MP3 files (that are your 2 questions) on the microSD?

3

Here are just 2 simple mp3's that I have recorded with my voice, nothing special :slight_smile:

4

Just to "re-cap" --

5

Oh sorry, they are 0001.mp3 and 0002.mp3

6

I hope you can find 'Library Manager'.
You need to download a library --
DFRobotDFPlayerMini.h

7

I have just installed it, but it is still the same result.

8

Naturally.
You need a sketch that works with that library.

9

would you be able to recommend me one that would work with my setup? Thanks

10

These should play your two files.
Next step is to do that as a result of 'buttonpushing'.
Tell me if it works or not.

#include "SoftwareSerial.h"
#include "DFRobotDFPlayerMini.h"

SoftwareSerial mySerial(10, 11);

// Create the Player object
DFRobotDFPlayerMini player;

void setup() 
{
  Serial.begin(19200);
  softwareSerial.begin(9600);
  if (player.begin(softwareSerial)) 
  {
   Serial.println("OK");

    // Set volume to maximum (0 to 30).
    player.volume(9); //30 is very loud
  } 
  else 
  {
    Serial.println("Connecting to DFPlayer Mini failed!");
  }

  //pinMode(13,OUTPUT);
  digitalWrite(13,LOW);
}

void loop() 
{
  Serial.println("Playing #1");
  player.play(1);
  delay(5000);

  Serial.println("Playing #2");
  player.play(2);
  delay(5000);
}
11

Thank you. It works, I just had to fix it a little bit. Just now we have to figure out how to code in the buttons :grin:

#include "SoftwareSerial.h"
#include "DFRobotDFPlayerMini.h"

SoftwareSerial mySerial(10, 11);

// Create the Player object
DFRobotDFPlayerMini player;

void setup() 
{
  Serial.begin(19200);
  mySerial.begin(9600);
  if (player.begin(mySerial)) 
  {
   Serial.println("OK");

    // Set volume to maximum (0 to 30).
    player.volume(9); //30 is very loud
  } 
  else 
  {
    Serial.println("Connecting to DFPlayer Mini failed!");
  }

  //pinMode(13,OUTPUT);
  digitalWrite(13,LOW);
}

void loop() 
{
  Serial.println("Playing #1");
  player.play(1);
  delay(5000);

  Serial.println("Playing #2");
  player.play(2);
  delay(50000000);
}
12

Too Loud?
(No way!)

delay(50000000);
That'll be a while.

13

Yeah, I was just checking how loud it can get :grin:. The second audio is just free calm music (only for testing purposes), and the audio is long. Once I add the second question I will adjust the delay appropriately.

14

The volume is surprising, depending on the speaker. (Put it in a plastic cup.)

15

I am using a 4ohm 3-watt speaker. It can get pretty loud!

16

It's deafening!

17
18

Oh my god! And I thought mine was loud!

19

I am still very new to C++, and I am struggling severely with the coding. Whatever I try, it always fails :frowning_face:.

20

The pushbutton goes from Pin7 (D7) to GND.

#include "SoftwareSerial.h"
#include "DFRobotDFPlayerMini.h"

SoftwareSerial mySerial(10, 11);

// Create the Player object
DFRobotDFPlayerMini player;

const byte pb = 7;
bool pr = false;

void setup() 
{
  pinMode(pb, INPUT_PULLUP);

  Serial.begin(19200);
  mySerial.begin(9600);
  if (player.begin(mySerial)) 
  {
   Serial.println("OK");

    // Set volume to maximum (0 to 30).
    player.volume(9); //30 is very loud
  } 
  else 
  {
    Serial.println("Connecting to DFPlayer Mini failed!");
  }
}

void loop() 
{
  clickIt(); 
  change();
}

void clickIt()
{
  pr = !pr;
  byte aa;
  do
  {
    aa = digitalRead(pb);
  }while(aa);
  
}

void change()
{
  if(pr)
  {
    Serial.println("Playing #1");
    player.play(1);
  }
  else
  {
    Serial.println("Playing #2");
    player.play(2);
  }
  delay(200); // cheap debounce
}