DFPlayer

Mini mp3 grotuvas skirtas veikti su mikrovaldikliais.

Galimi pavadinimai:

• DFPlayer
• MP3-TF-16P
• MP3-TF-16P V3.0

ESP32 Pajungimas

• ESP32 PIN 16 (hardware serial2 rx) -> DFPlayer TX
• ESP32 PIN 17 (hardware serial2 tx) -> DFPlayer RX
• ESP32 3V3 -> DFPlayer VCC
• ESP32 GND -> DFPlayer GND
• Taip pat prie RX ir GND dedamas 100k rezistorius.
• Speaker (mono) + DFPlayer SPK1
• Speaker (mono) - DFPlayer SPK2

Žinotina, kad žmonės naudoja ir stereo su šiuo grotuvu (asmeniškai neišbandyta). Naudojama arduino biblioteka: https://github.com/Makuna/DFMiniMp3

Kodo pavyzdys

#include <DFMiniMp3.h>

// forward declare the notify class, just the name
//
class Mp3Notify; 

// define a handy type using serial and our notify class
//
typedef DFMiniMp3<HardwareSerial, Mp3Notify> DfMp3; 

// instance a DfMp3 object, 
//
DfMp3 dfmp3(Serial2);

class Mp3Notify
{
public:
  static void PrintlnSourceAction(DfMp3_PlaySources source, const char* action)
  {
    if (source & DfMp3_PlaySources_Sd) 
    {
        Serial.print("SD Card, ");
    }
    if (source & DfMp3_PlaySources_Usb) 
    {
        Serial.print("USB Disk, ");
    }
    if (source & DfMp3_PlaySources_Flash) 
    {
        Serial.print("Flash, ");
    }
    Serial.println(action);
  }
  static void OnError([[maybe_unused]] DfMp3& mp3, uint16_t errorCode)
  {
    // see DfMp3_Error for code meaning
    Serial.println();
    Serial.print("Com Error ");
    Serial.println(errorCode);
  }
  static void OnPlayFinished([[maybe_unused]] DfMp3& mp3, [[maybe_unused]] DfMp3_PlaySources source, uint16_t track)
  {
    Serial.print("Play finished for #");
    Serial.println(track);  
  }
  static void OnPlaySourceOnline([[maybe_unused]] DfMp3& mp3, DfMp3_PlaySources source)
  {
    PrintlnSourceAction(source, "online");
  }
  static void OnPlaySourceInserted([[maybe_unused]] DfMp3& mp3, DfMp3_PlaySources source)
  {
    PrintlnSourceAction(source, "inserted");
  }
  static void OnPlaySourceRemoved([[maybe_unused]] DfMp3& mp3, DfMp3_PlaySources source)
  {
    PrintlnSourceAction(source, "removed");
  }
};


void setup() 
{
  Serial.begin(115200);

  Serial.println("initializing...");
  
  dfmp3.begin();
  dfmp3.reset(); 
  
  // show some properties and set the volume
  uint16_t volume = dfmp3.getVolume();
  Serial.print("volume ");
  Serial.println(volume);
  dfmp3.setVolume(14);
  
  uint16_t count = dfmp3.getTotalTrackCount(DfMp3_PlaySource_Sd);
  Serial.print("files ");
  Serial.println(count);

  uint16_t mode = dfmp3.getPlaybackMode();
  Serial.print("playback mode ");
  Serial.println(mode);
  
  Serial.println("starting...");
  
  dfmp3.playRandomTrackFromAll(); // random of all folders on sd
}

void loop() 
{
  // calling dfmp3.loop() periodically allows for notifications 
  // to be handled without interrupts
  dfmp3.loop();
}

Pavyzdys groja atsitiktinius įrašus iš microSD kortelės, suformatuotos kaip FAT32 palaikoma iki 32GB kortelės. Išbandyta su Good Ram MicroSDHC I 32GB. Taip pat reikalinga tam tikra hierarchija failų sistemoja, norint, kad tinkamai veiktų, plačiau galima paskaityti bibliotekos autoriaus repozitorijoje.