# miniDfplayer,5v amplifier,arduino uno and speaker project

**URL:** <https://forum.arduino.cc/t/minidfplayer-5v-amplifier-arduino-uno-and-speaker-project/1372829>\
**Category:** General Guidance\
**Created:** [April 12, 2025, 11:31am UTC](https://forum.arduino.cc/t/minidfplayer-5v-amplifier-arduino-uno-and-speaker-project/1372829 "2025-04-12T11:31:29Z")\
**Posts on this page:** 15\
**Page:** 2

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**Author:** ![badir](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/badir/32/1207177_2.png) [@badir](https://forum.arduino.cc/u/badir)\
**Post date:** [April 12, 2025, 1:05pm UTC](https://forum.arduino.cc/t/minidfplayer-5v-amplifier-arduino-uno-and-speaker-project/1372829/22 "2025-04-12T13:05:45Z")

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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

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**Author:** ![xfpd](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/xfpd/32/1120236_2.png) [@xfpd](https://forum.arduino.cc/u/xfpd)\
**Post date:** [April 12, 2025, 1:12pm UTC](https://forum.arduino.cc/t/minidfplayer-5v-amplifier-arduino-uno-and-speaker-project/1372829/23 "2025-04-12T13:12:10Z")

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> [@badir](#):
>
> is this correct

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

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<div class="post-metadata">

**Author:** ![badir](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/badir/32/1207177_2.png) [@badir](https://forum.arduino.cc/u/badir)\
**Post date:** [April 12, 2025, 1:21pm UTC](https://forum.arduino.cc/t/minidfplayer-5v-amplifier-arduino-uno-and-speaker-project/1372829/24 "2025-04-12T13:21:14Z")

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the code:

```arduino
#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](https://europe1.discourse-cdn.com/arduino/original/4X/0/b/c/0bcc1d47aac62e8d61afd3ddd5a1caac0a3044a1.png)

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<div class="post-metadata">

**Author:** ![xfpd](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/xfpd/32/1120236_2.png) [@xfpd](https://forum.arduino.cc/u/xfpd)\
**Post date:** [April 12, 2025, 1:30pm UTC](https://forum.arduino.cc/t/minidfplayer-5v-amplifier-arduino-uno-and-speaker-project/1372829/25 "2025-04-12T13:30:47Z")

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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).

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<div class="post-metadata">

**Author:** ![badir](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/badir/32/1207177_2.png) [@badir](https://forum.arduino.cc/u/badir)\
**Post date:** [April 12, 2025, 1:36pm UTC](https://forum.arduino.cc/t/minidfplayer-5v-amplifier-arduino-uno-and-speaker-project/1372829/26 "2025-04-12T13:36:18Z")

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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

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<div class="post-metadata">

**Author:** ![xfpd](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/xfpd/32/1120236_2.png) [@xfpd](https://forum.arduino.cc/u/xfpd)\
**Post date:** [April 12, 2025, 1:43pm UTC](https://forum.arduino.cc/t/minidfplayer-5v-amplifier-arduino-uno-and-speaker-project/1372829/27 "2025-04-12T13:43:18Z")

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> [@badir](#):
>
> couldn't i make it with rx tx pins

Yes. Follow the example on the official DFPlayerMini page.

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<div class="post-metadata">

**Author:** ![badir](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/badir/32/1207177_2.png) [@badir](https://forum.arduino.cc/u/badir)\
**Post date:** [April 12, 2025, 1:57pm UTC](https://forum.arduino.cc/t/minidfplayer-5v-amplifier-arduino-uno-and-speaker-project/1372829/28 "2025-04-12T13:57:07Z")

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

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<div class="post-metadata">

**Author:** ![xfpd](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/xfpd/32/1120236_2.png) [@xfpd](https://forum.arduino.cc/u/xfpd)\
**Post date:** [April 12, 2025, 2:05pm UTC](https://forum.arduino.cc/t/minidfplayer-5v-amplifier-arduino-uno-and-speaker-project/1372829/29 "2025-04-12T14:05:13Z")

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> [@badir](#):
>
> arduino uno

> [@badir](#):
>
> arduino mega

There is a difference here.

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<div class="post-metadata">

**Author:** ![badir](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/badir/32/1207177_2.png) [@badir](https://forum.arduino.cc/u/badir)\
**Post date:** [April 12, 2025, 2:27pm UTC](https://forum.arduino.cc/t/minidfplayer-5v-amplifier-arduino-uno-and-speaker-project/1372829/30 "2025-04-12T14:27:16Z")

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

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<div class="post-metadata">

**Author:** ![xfpd](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/xfpd/32/1120236_2.png) [@xfpd](https://forum.arduino.cc/u/xfpd)\
**Post date:** [April 12, 2025, 3:20pm UTC](https://forum.arduino.cc/t/minidfplayer-5v-amplifier-arduino-uno-and-speaker-project/1372829/31 "2025-04-12T15:20:36Z")

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> [@badir](#):
>
> pins same

No.

Uno datasheet:

> **[A000066-datasheet.pdf](https://docs.arduino.cc/resources/datasheets/A000066-datasheet.pdf)**

Mega2560 datasheet:

> **[A000067-datasheet.pdf](https://docs.arduino.cc/resources/datasheets/A000067-datasheet.pdf)**

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

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<div class="post-metadata">

**Author:** ![Terrypin](https://avatars.discourse-cdn.com/v4/letter/t/a3d4f5/32.png) [@Terrypin](https://forum.arduino.cc/u/Terrypin)\
**Post date:** [April 12, 2025, 3:30pm UTC](https://forum.arduino.cc/t/minidfplayer-5v-amplifier-arduino-uno-and-speaker-project/1372829/32 "2025-04-12T15:30:15Z")

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> [@badir](#):
>
> if it doesn't work

You already said it didn’t work.

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<div class="post-metadata">

**Author:** ![badir](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/badir/32/1207177_2.png) [@badir](https://forum.arduino.cc/u/badir)\
**Post date:** [April 12, 2025, 4:31pm UTC](https://forum.arduino.cc/t/minidfplayer-5v-amplifier-arduino-uno-and-speaker-project/1372829/33 "2025-04-12T16:31:59Z")

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

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<div class="post-metadata">

**Author:** ![xfpd](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/xfpd/32/1120236_2.png) [@xfpd](https://forum.arduino.cc/u/xfpd)\
**Post date:** [April 12, 2025, 5:39pm UTC](https://forum.arduino.cc/t/minidfplayer-5v-amplifier-arduino-uno-and-speaker-project/1372829/34 "2025-04-12T17:39:02Z")

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

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<div class="post-metadata">

**Author:** ![Terrypin](https://avatars.discourse-cdn.com/v4/letter/t/a3d4f5/32.png) [@Terrypin](https://forum.arduino.cc/u/Terrypin)\
**Post date:** [April 12, 2025, 7:02pm UTC](https://forum.arduino.cc/t/minidfplayer-5v-amplifier-arduino-uno-and-speaker-project/1372829/35 "2025-04-12T19:02:47Z")

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> [@badir](#):
>
> i tried 9,10 pins.it didn't work again

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.

```arduino
#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()
{
}

```

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<div class="post-metadata">

**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\
**Post date:** [October 9, 2025, 7:02pm UTC](https://forum.arduino.cc/t/minidfplayer-5v-amplifier-arduino-uno-and-speaker-project/1372829/36 "2025-10-09T19:02:49Z")

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Closed on October 9, 2025, 7:02pm UTC

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