How to initialize DFPlayer mini with Arduino Nano ESP32

Projects General Guidance
1

Hi,

I've tried many fixes with my setup, but can't make it work somehow.

I'm trying to initialize a DFPlayer mini with an Arduino Nano ESP32, but have had no success so far.

See below for the wiring and the code, I'd appreciate any hints!

circuit
circuit480×300 5.1 KB

#include "Arduino.h"
#include "DFRobotDFPlayerMini.h"

HardwareSerial mySerial(1);

const int RX_PIN = 6;
const int TX_PIN = 7;

DFRobotDFPlayerMini myDFPlayer;

void setup() {
  Serial.begin(115200);
  
  mySerial.begin(9600, SERIAL_8N1, RX_PIN, TX_PIN);

  if (!myDFPlayer.begin(mySerial, true, true)) {
    Serial.println(F("Error: Couldn't initialize.));
    while (true);
  }
  
  Serial.println(F("DFPlayer Mini initialized!"));

  myDFPlayer.volume(20);
  Serial.println(F("Volume set to 20"));

  Serial.println(F("Playing Track 1..."));
  myDFPlayer.play(1);
}

void loop() {
  // If I ever get here lol
}
2

The 1K resistor is not necessary. The Nano ESP32 and the DFPlayer mini are both 3.3V devices. But the 1K should not stop it from working.

2 Likes
3

The ESP tx should go to the DF rx - and the ESP rx should go to the DF tx.

place a
delay(2000);
in the line after the mySerial.begin

3 Likes
4

Wouldn't it be better to put

while (!mySerial);

in place of the delay()?

1 Like
5

ok
either way

2 Likes
6

So I'd do:

const int RX_PIN = 0;
const int TX_PIN = 1;

then?

7

No, because the player is connected to pins 6, 7

1 Like
8

What's "6" assigned to? Where's it going?
What's "7" assigned to? Where's it going?

1 Like
9

I thought your answer above suggested moving the connected ESP PINs from 6/7 to the labeled TX/RX-PINs (D0/D1).

D6 is connected to DFPlayer RX, D7 is connected to DFPlayer TX.

10

And you have defined D6 to be an Rx pin, and D7 to be a Tx pin.

So you have two receivers connected, and two transmitters connected.

That is a problem.

A transmitting pin must be connected to a receiving pin. And vice versa.

1 Like
11

I see, I switched them around since a lot of posts suggested that, whoops.

After switching them one last time, it actually works! I could swear I tried this, but apparently not. I incorporated @runaway_pancake 's suggestion too, adding a delay after the serial.begin().

Thanks everyone for helping me out!

12

Last time I ever answer a "DFPlayer" 'question' again.

1 Like