DFplayer

Using Arduino Programming Questions
1

hello. can anyone say why i see this error:

mp3_set_serial was not declared in this scope

i've downloaded "DFPlayer-Mini-mp3-master" and placed in libraries folder. the code is bellow:

#include <SoftwareSerial.h>
#include <DFPlayer_Mini_Mp3.h>

void setup () {
  Serial.begin (9600);
  mp3_set_serial (Serial);      //set Serial for DFPlayer-mini mp3 module 
  delay(1);                     // delay 1ms to set volume
  mp3_set_volume (15);          // value 0~30
}

void loop () {        
  mp3_play (1);
  delay (6000);
  mp3_next ();
  delay (6000);
  mp3_prev ();
  delay (6000);
  mp3_play (4);
  delay (6000);
}

/*
   mp3_play ();     //start play
 mp3_play (5);    //play "mp3/0005.mp3"
 mp3_next ();     //play next 
 mp3_prev ();     //play previous
 mp3_set_volume (uint16_t volume);    //0~30
 mp3_set_EQ ();   //0~5
 mp3_pause ();
 mp3_stop ();
 void mp3_get_state ();   //send get state command
 void mp3_get_volume (); 
 void mp3_get_u_sum (); 
 void mp3_get_tf_sum (); 
 void mp3_get_flash_sum (); 
 void mp3_get_tf_current (); 
 void mp3_get_u_current (); 
 void mp3_get_flash_current (); 
 void mp3_single_loop (boolean state);    //set single loop 
 void mp3_DAC (boolean state); 
 void mp3_random_play (); 
 */
2

The DFPlayer library isn't installed properly - you probably had a lot of other errors too, right?

A common mistake: you need to rename the library's folder from DFPlayer-Mini-mp3-master to just DFPlayer-Mini-mp3

3

yes i have more errors.
but rename the library wasn't effective :confused: again same error

4

oh solved! but now i have another error: Time out error

5

u use delay 600000ms

mp3_next ();
delay (600000);

6

have you ever use void

mp3_get_volume ();

commend ?