miniDfplayer,5v amplifier,arduino uno and speaker project

Projects General Guidance
22

is this correct: arduino uno's tx pin to dfplayer's rx pin and between of them there is a 1k registor,arduino uno's rx pin to dfplayer's tx pin,SPK pins to speaker.Is that enough? or should i do something with ADKEY pins

23

Compare your wiring with the drawing in the official DFPlayerMini data page. Make a drawing of your connections.

24

the code:

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

// Use pins 2 and 3 to communicate with DFPlayer Mini
static const uint8_t PIN_MP3_TX = 2; // Connects to module's RX 
static const uint8_t PIN_MP3_RX = 3; // Connects to module's TX 
SoftwareSerial softwareSerial(PIN_MP3_RX, PIN_MP3_TX);

// Create the Player object
DFRobotDFPlayerMini player;

void setup() {

  // Init USB serial port for debugging
  Serial.begin(9600);
  // Init serial port for DFPlayer Mini
  softwareSerial.begin(9600);

  // Start communication with DFPlayer Mini
  if (player.begin(softwareSerial)) {
   Serial.println("OK");

    // Set volume to maximum (0 to 30).
    player.volume(20);
    // Play the first MP3 file on the SD card
    player.play(1);
  } else {
    Serial.println("Connecting to DFPlayer Mini failed!");
  }
}

void loop() {

 
   }

here is the circuit:

Ekran Resmi 2025-04-12 16.19.13
Ekran Resmi 2025-04-12 16.19.131268×810 95.1 KB

25

That drawing is showing I/O Mode. You will need a device (jumper wire, pushbutton, other?) to short GND to IO_1 or IO_2 to play next/previous or volume up/down.
[edit]
You should label any unlabeled pins that you are using, like VCC, GND, SPK_1, SPK2, TX, RX (and when add the connections, IO_1 and IO_2).

26

i want to control them in my website.Which is connected with uart on my arduino mega.couldn't i make it with rx tx pins

27

Yes. Follow the example on the official DFPlayerMini page.

28

okay .i will focus on serial messages between arduino uno and dfplayer

29

There is a difference here.

30

i meant arduino mega.But what is the difference? aren't rx tx pins same

31

No.

Uno datasheet:

Mega2560 datasheet:

Get to know each device you use. It will save hundreds of questions and answers.

32

You already said it didn’t work.

33

i tried 9,10 pins.it didn't work again

34

With what code and what Arduino board? Why are you being so vague? Stop being vague. When people ask questions, answer the question, fully.

35

Which tells me nothing useful.

With the correction to your RX/TX pair I've suggested several times your sketch works correctly on a Uno here.

Youve not shown us your latest sketch and schematic. But I'm assuming that your wiring has been the cause all along.

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

// Use pins 10 and 11 to communicate with DFPlayer Mini
static const uint8_t PIN_MP3_RX = 10; // Connects to module's TX
static const uint8_t PIN_MP3_TX = 11; // Connects to module's RX

SoftwareSerial softwareSerial(PIN_MP3_RX, PIN_MP3_TX);

// Create the Player object
DFRobotDFPlayerMini player;

void setup()
{

  // Init USB serial port for debugging
  Serial.begin(9600);
  // Init serial port for DFPlayer Mini
  softwareSerial.begin(9600);

  // Start communication with DFPlayer Mini
  if (player.begin(softwareSerial))
  {
    Serial.println("OK");

    // Set volume.
    player.volume(20);
    // Play the first MP3 file on the SD card
    player.play(1);
  }
  else
  {
    Serial.println("Connecting to DFPlayer Mini failed!");
  }
}

void loop()
{
}