How to repeat the wav file in this code with nodemcu12E

Projects General Guidance
1

I have a nodemcu12E and 1 transistor connected to the RX pin and a small speaker. Just tests.

I encoded a WAV in hexadecimal and attached it to the code below in the sons.h tab (this tab does not appear here).

As soon as I turn it on I hear the audio. But I can't listen to it several times. In other words, it seems like there is something in setup() that should be in loop()

I put an int cron; just to make it easier to help here. In practice I will use a button.

Does anyone know how to make the audio play whenever cron is >= 10000 ?

In loop() it would be something like this:

cron++;
if(cron >= 10000) {
plays wav;
}

Thanks

#include <Arduino.h>
#include "AudioFileSourcePROGMEM.h"
#include "AudioGeneratorWAV.h"
#include "AudioOutputI2SNoDAC.h"

#include "sons.h"

AudioGeneratorWAV *wav;
AudioFileSourcePROGMEM *file;
AudioOutputI2SNoDAC *out;

int cron;

void setup()
{
  Serial.begin(115200);
  delay(1000);
  Serial.printf("WAV start\n");

  audioLogger = &Serial;
  file = new AudioFileSourcePROGMEM( viola, sizeof(viola) );
  out = new AudioOutputI2SNoDAC();
  wav = new AudioGeneratorWAV();
  wav->begin(file, out);
}

void loop()
{  
  if (wav->isRunning()) {
    if (!wav->loop()) wav->stop();
  } else {
    Serial.printf("WAV done\n");
    delay(1000);
  }
}
3

I'm trying here, but still without success:

void loop() {  
  
  wav->isRunning();
  cron++;
  Serial.println(cron); 

  if (cron > 5000) {
    wav->loop();
  }
  if(cron > 7000) {
    cron = 0;
  }
}
4

I did several tests. But he still only plays the viola.h just 1 time. But the way the code below is, the nodemcu is resetting.

Does anyone know how to make the viola.h audio play repeatedly in loop()?

*Later I will try to place a button, so that it only rings when I press it. Just like a bell.

Thanks

#include <Arduino.h>
#include "AudioFileSourcePROGMEM.h"
#include "AudioGeneratorWAV.h"
#include "AudioOutputI2SNoDAC.h"

#include "viola.h"

AudioGeneratorWAV *wav;
AudioFileSourcePROGMEM *file;
AudioOutputI2SNoDAC *out;

int currentFileIndex = 0;

void setup()
{
  Serial.begin(115200);
  delay(1000);
  
  audioLogger = &Serial;
  file = new AudioFileSourcePROGMEM(viola, sizeof(viola));
  out = new AudioOutputI2SNoDAC();
  out->SetGain(1); //volume 
  wav = new AudioGeneratorWAV();
  //wav->begin(file, out);
}

void loop() {  


  if(currentFileIndex < sizeof(viola)) {
   file = new AudioFileSourcePROGMEM(viola, sizeof(viola));
   out = new AudioOutputI2SNoDAC();  
   wav->begin(file, out); //Start playing the track loaded
   currentFileIndex++;
  }

//  Serial.println(currentFileIndex);
//  Serial.println(sizeof(viola));
  
  if(wav->isRunning()) {
    if (!wav->loop()) {
       wav->stop();
       currentFileIndex = 0;
    }
  }
  
  //delay(1000);
}
5

I don't see anywhere in loop() where you actually restart the playback.

Maybe add an extra else {} block like this:

  if(wav->isRunning()) {
    if (!wav->loop()) {
       wav->stop();
       currentFileIndex = 0;
    }
  }
  else { // wav isn't running any more, start it again.
    wav->begin(file, out); //Start playing the track loaded
  }

Now I may be totally wrong, but then don't understand the use of currentFileIndex and some other things in that file. But this is basically what you ask for: run the wav in a loop, in other words: the moment it stops, restart it.

6

Thanks for trying to help by posting code.

I tested it here but there was one detail missing. And I had just found the solution minutes ago. The 'secret' is GO, a simple boolean.

I hope it helps a lot of people because, based on the extensive research I did, this information is not that available to those who are not programmers.

#include <Arduino.h>
#include "AudioFileSourcePROGMEM.h"
#include "AudioGeneratorWAV.h"
#include "AudioOutputI2SNoDAC.h"

#include "viola.h"

AudioGeneratorWAV *wav;
AudioFileSourcePROGMEM *file;
AudioOutputI2SNoDAC *out;

uint32_t start = 0;
bool go = false;

void setup()
{
  Serial.begin(115200);
  delay(1000);
  
  audioLogger = &Serial;
  file = new AudioFileSourcePROGMEM(viola, sizeof(viola));
  out = new AudioOutputI2SNoDAC();
  wav = new AudioGeneratorWAV();
  //wav->begin(file, out);         //moved to loop()
}

void loop() {  
  
  if (!start) start = millis();

  if (millis()-start > 10000) {
    if (!go) {
      Serial.printf("starting audio\n");
      out->SetGain(0.1); //max. 3
      wav = new AudioGeneratorWAV();
      file = new AudioFileSourcePROGMEM(viola, sizeof(viola));
      wav->begin(file, out);
      go = true;
    }
  }  
  
  if (wav->isRunning()) {
      if (!wav->loop()) { 
        wav->stop();
        start = 0;
        go = false;
      }
  }

}
7

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