Problem with multiple SoftwareSerial

Projects Programming
15

Thanks for all your help, it works so far. Now I can go further.
I have changed the order of some lines and tried and changed and renamed some more thing and now I can control the Mp3 player through my phone. I am getting somewhere.
I have put my code below for anyone who is interested.

//  Arduino D3 to BT RX through a voltage divider
//  Arduino D2 BT TX (no need voltage divider)
//  Arduino D11 to dfRobot RX 
//  Arduino D10 to dfRobot TX 
#include <DFRobotDFPlayerMini.h>
#include <SoftwareSerial.h>

SoftwareSerial Mp3com(10,11);    //RX, TX, communicate with Mp3 player
SoftwareSerial btcom(2,3);       //RX, TX, communicate with bluetooth
DFRobotDFPlayerMini  Mp3speler;  //name Mp3 player
char command;                    // command variable from bluetooth


void setup(){ 
  Mp3com.begin(9600);            //set Mp3 Player baudrate       
  btcom.begin(9600);             //set bluetooth baudrate
   Mp3speler.begin(Mp3com);      //Use Mp3com to communicate with mp3.
   Mp3speler.volume(30);
}


void loop(){
  btcom.listen();
  if(btcom.available() > 0){
    command = btcom.read();    
    speler();
  }
}



void speler(){                  //function to control Mp3 player
   switch(command){
    case 'a':
      Mp3speler.start();   
    break;
    
    case 'b':
      Mp3speler.stop();    
    break;
    
    case 'c':
      Mp3speler.next();
    break;
    
    case 'd':
      Mp3speler.previous();
    break;

    case 'e':
      Mp3speler.volumeDown();
    break;

    case 'f':
      Mp3speler.volumeUp();
    break;
  }
}