Hi all
I have again a problem when connect my nano with dfrobot mini mp3 i get this error in my Programm.
See on the pictures i added.
Somebody can help me?
Greetings
A screenshot of the console error would be helpful too.
Have you read the how to use this forum sticky? Please read it.
Post your code so that everyone can see and reproduce your error and tell you the fix.
Your problem is that the function has not been declared so declare it. Without seeing your code we can't help you further.
Please post the code using the </> icon. Do not post code if you don't know what that means. Read the sticky post again.
Ok thank you sir.
I will.
hello again i read the sticky 
the code is
void setup () {
Serial.begin (9600);
mp3_set_serial (Serial); //set Serial for DFPlayer-mini mp3 module
mp3_set_volume (10);
}
void loop () {
mp3_play (1); //play 0001.mp3
delay (10000); //10 sec, time delay to allow 0001.mp3 to finish playing
mp3_play (2);
delay (5000);
mp3_play (5);
delay (5000);
mp3_play (20); //play 0020.mp3
delay (9000);
mp3_play (81);
delay (6000);
mp3_play (74); //play 0074 mp3
delay (6000);
}
Konsole Message
sketch_sep08a.ino: In function 'void setup()':
sketch_sep08a:5: error: 'mp3_set_serial' was not declared in this scope
sketch_sep08a:6: error: 'mp3_set_volume' was not declared in this scope
sketch_sep08a.ino: In function 'void loop()':
sketch_sep08a:11: error: 'mp3_play' was not declared in this scope
'mp3_set_serial' was not declared in this scope
greetings
Norbert
It might need a DFPlayer library.
Did you install that?
I also don't see these lines in your sketch.
#include <SoftwareSerial.h>
#include <DFPlayer_Mini_Mp3.h>
Leo..
Thank you very much i did it!!!!!
here a small video
so this was the first step, the next is.....how i make it that the 2nd sound "humming" is all over the time after the switch on sound.
because now its on a loop so its start everytime from beginning after the time count down.
and one more question is.... when i connect a switch and turn it on it takes 5 sec to start the sound is there a possibility to start it instant when i push the switch?
/*******************************************************************************
* DFPlayer_Mini_Mp3, This library provides a quite complete function for *
* DFPlayer mini mp3 module. *
* www.github.com/dfrobot/DFPlayer_Mini_Mp3 (github as default source provider)*
* DFRobot-A great source for opensource hardware and robot. *
* *
* This file is part of the DFplayer_Mini_Mp3 library. *
* *
* DFPlayer_Mini_Mp3 is free software: you can redistribute it and/or *
* modify it under the terms of the GNU Lesser General Public License as *
* published by the Free Software Foundation, either version 3 of *
* the License, or any later version. *
* *
* DFPlayer_Mini_Mp3 is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Lesser General Public License for more details. *
* *
* DFPlayer_Mini_Mp3 is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with DFPlayer_Mini_Mp3. If not, see *
* <http://www.gnu.org/licenses/>. *
* *
******************************************************************************/
/*
* Copyright: DFRobot
* name: DFPlayer_Mini_Mp3 sample code
* Author: lisper <lisper.li@dfrobot.com>
* Date: 2014-05-30
* Description: sample code for DFPlayer Mini, this code is test on Uno
* note: mp3 file must put into mp3 folder in your tf card
*/
#include <SoftwareSerial.h>
#include <DFPlayer_Mini_Mp3.h>
//
void setup () {
Serial.begin (9600);
mp3_set_serial (Serial); //set Serial for DFPlayer-mini mp3 module
mp3_set_volume (30);
}
//
void loop () {
mp3_play (1);
delay (2000);
mp3_next ();
delay (6000);
mp3_play (2);
delay (6000);
mp3_play (2);
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 ();
*/
Greetings
You want a 512kb RAM, 16Mhz system to decode and buffer MP3 instantly?
Yeah? Is it impossible?