Android DFPlayer Mini Bluetooth control

RiverTrue Aug 25.2022

0 22471 Easy

Android app controlled DFPlayer Mini using esp32 Wroom

Things used in this project

Hardware components

HARDWARE LIST

Arduino esp32 WROOM32

DFRobot DFPlayer - A Mini MP3 Player

Link

Software apps and online services

Arduino IDE

Story

Now with Folder Selection ::

I couldn't find a royalty free app to control the DFPlayer Mini from my mobile phone using bluetooth so I went off to create one.

There's very little to wire up really. The Serial 2 lines (16 RX and 17 TX) from the esp32 wroom the power and the speaker.

The 5v in on the esp32 isn't necessarily 5v out so the power to the dfplayer could be connected to 3.3v while it is connected to the PC.

I've included the apk file for android phones. download and install. There's no working version for Apple phones.

The bluetooth connection between the esp32 and the phone should be made (paired) before the app can find and use it. There will be a pop up menu to select the esp broadcast name. that the phone is connected to. I have called the connection "esp32" in this example.

I've updated the functions to include folder selection 1 - 10.

To use folder selection, a blank SD Card needs to be prepared with folders with names 01 to 10.. they can contain mp3's or other folders containing mp3's within them with file names beginning with 0001_

Note : It will not work if you merely rename folders on the SD Card :

Custom parts and enclosures

Folder Version

Download and install on Android Phone

Schematics

Code

Folder Version

Arduino

Flash the esp32 using arduino IDE

CODE

#include <BluetoothSerial.h>
#include <Arduino.h>
#include <DFRobotDFPlayerMini.h>
DFRobotDFPlayerMini myDFPlayer;


BluetoothSerial SerialBT;

#define BT_DISCOVER_TIME	10000
int action = 0;
int Song = 0;
static bool btScanAsync = true;
static bool btScanSync = true;

void btAdvertisedDeviceFound(BTAdvertisedDevice* pDevice) {
	Serial.printf("Found a device asynchronously: %s\n", pDevice->toString().c_str());
}

void setup() {
 Serial2.begin(9600);
 Serial.begin(115200);
  if (!myDFPlayer.begin(Serial2)) {  //Serial2 to communicate with mp3.
    Serial.println(F("Unable to begin:"));
    Serial.println(F("1.Please recheck the connection!"));
    Serial.println(F("2.Please insert the SD card!"));
    while(true);
       delay(0); // Code to compatible with ESP8266 watch dog.   
  }
    Serial.println(F("DFPlayer Mini online."));
  
  myDFPlayer.setTimeOut(500); //Set serial communictaion time out 500ms
  
  SerialBT.begin("ESP32"); //Bluetooth device name
  Serial.println("The device started, now you can pair it with bluetooth!");


  if (btScanAsync) {
    Serial.print("Starting discoverAsync...");
    if (SerialBT.discoverAsync(btAdvertisedDeviceFound)) {
      Serial.println("Findings will be reported in \"btAdvertisedDeviceFound\"");
      delay(10000);
      Serial.print("Stopping discoverAsync... ");
      SerialBT.discoverAsyncStop();
      Serial.println("stopped");
    } else {
      Serial.println("Error on discoverAsync f.e. not workin after a \"connect\"");
    }
  }
  
  if (btScanSync) {
    Serial.println("Starting discover...");
    BTScanResults *pResults = SerialBT.discover(BT_DISCOVER_TIME);
    if (pResults)
      pResults->dump(&Serial);
    else
      Serial.println("Error on BT Scan, no result!");
  }
  myDFPlayer.volume(10);
}

void loop() {
  action = SerialBT.read();
  if (action != -1) {
 Serial.println (action);    //Print what we receive 

    switch (action) {
      case 1:
       myDFPlayer.previous();  //Play previous mp3
       break;
       
       case 2:
       myDFPlayer.pause(); //Stop
       Song = 0;
       break;
       
       case 3:  
       if (Song == 0) {
        myDFPlayer.play(1);  //Play from beginning  
        myDFPlayer.enableLoopAll();
        Song = 1;     
       }
       else {
        myDFPlayer.start(); //Play from Pause
        myDFPlayer.disableLoopAll();
       }
       break;
       
       case 4:
       myDFPlayer.pause(); //Pause
       break;
       
       case 5:
       myDFPlayer.next(); //Next
       break;
       
       case 6:
       myDFPlayer.volumeDown(); //Volume +
       break;
       
       case 7:
       myDFPlayer.volumeUp(); //Volume -
       break;

       case 8:
       myDFPlayer.EQ(DFPLAYER_EQ_NORMAL);
       break;

       case 9:
       myDFPlayer.EQ(DFPLAYER_EQ_POP);
       break;

       case 10:
       myDFPlayer.EQ(DFPLAYER_EQ_ROCK);
       break;

       case 11:
       myDFPlayer.EQ(DFPLAYER_EQ_JAZZ);
       break;

       case 12:
       myDFPlayer.EQ(DFPLAYER_EQ_CLASSIC);
       break;

       case 13:
       myDFPlayer.EQ(DFPLAYER_EQ_BASS);
       break;

       case 14:
       myDFPlayer.loopFolder(1);
       break;

       case 15:
       myDFPlayer.loopFolder(2);
       break; 
           
       case 16:
       myDFPlayer.loopFolder(3);
       break;
       
       case 17:
       myDFPlayer.loopFolder(4);
       break;
       
       case 18:
       myDFPlayer.loopFolder(5);
       break; 

       case 19:
       myDFPlayer.loopFolder(6);
       break; 

       case 20:
       myDFPlayer.loopFolder(7);
       break;

       case 21:
       myDFPlayer.loopFolder(8);
       break;
       
       case 22:
       myDFPlayer.loopFolder(9);
       break;

       case 23:
       myDFPlayer.loopFolder(10);
       break; 
                      
    }
    
  }
  }

The article was first published in hackster, July 5, 2022

cr: https://www.hackster.io/stevie135s/android-dfplayer-mini-bluetooth-control-04071f

author: stevie135s

License

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