Ok friends I already have it, I had not seen these manuals. Thank you

Hello friends, I have a query, I want to make a network with multiple esp32. Basically it would be like this:

MASTER1---send data to slave1--> SLAVE1 (receive data from master1)

(SLAVE1 becomes master and sends the information to slave2)
SLAVE1---send data to slave2--> SLAVE2 (receive data from slave2)

And so on...

Is it possible to convert a slave into a master so that it sends the information to the next one?

Greetings and thank you
Fran

Hello, some example of how to use SPK with the library: github

How do I configure the output to use the spk chip?
I have modified an example in the ide, but I don't know if it is correct.

This example in theory plays an mp3 station

Thanks for the help
All the best
Francisco

#include <Arduino.h>
#include <M5Atom.h>
#include <WiFi.h>
#include "AudioFileSourceICYStream.h"
#include "AudioFileSourceBuffer.h"
#include "AudioGeneratorMP3.h"
//#include "AudioOutputI2SNoDAC.h"
#include "AudioOutputI2S.h"

// Enter your WiFi setup here:
#ifndef STASSID
#define STASSID "TESTWIFI"
#define STAPSK "TEST"
#endif

// Digital I/O used
#define I2S_DOUT 25 // DIN connection
#define I2S_BCLK 22 // Bit clock
#define I2S_LRC 21 // Left Right Clock

const char* ssid = STASSID;
const char* password = STAPSK;

// Randomly picked URL
const char* URL = "http://kvbstreams.dyndns.org:8000/wkvi-am";

AudioGeneratorMP3* mp3;
AudioFileSourceICYStream* file;
AudioFileSourceBuffer* buff;
//AudioOutputI2SNoDAC* out;
AudioOutputI2S* out = NULL;
//AudioOutputI2S* out

void setup()
{
M5.begin();

Serial.begin(9600);
delay(1000);
Serial.println("Connecting to WiFi");

WiFi.disconnect();
WiFi.softAPdisconnect(true);
WiFi.mode(WIFI_STA);

WiFi.begin(ssid, password);

// Try forever
while (WiFi.status() != WL_CONNECTED) {
	Serial.println("...Connecting to WiFi");
	delay(1000);
}
Serial.println("Connected");

audioLogger = &Serial;
file = new AudioFileSourceICYStream(URL);
file->RegisterMetadataCB(MDCallback, (void*)"ICY");
buff = new AudioFileSourceBuffer(file, 2048);
buff->RegisterStatusCB(StatusCallback, (void*)"buffer");
//out = new AudioOutputI2SNoDAC();

out = new AudioOutputI2S(0, 1, 32);
out->begin();



mp3 = new AudioGeneratorMP3();
mp3->RegisterStatusCB(StatusCallback, (void*)"mp3");
mp3->begin(buff, out);

}

void loop()
{
static int lastms = 0;

if (mp3->isRunning()) {
	if (millis() - lastms > 1000) {
		lastms = millis();
		Serial.printf("Running for %d ms...\n", lastms);
		Serial.flush();
	}
	if (!mp3->loop()) mp3->stop();
}
else {
	Serial.printf("MP3 done\n");
	delay(1000);
}

}

// Called when a metadata event occurs (i.e. an ID3 tag, an ICY block, etc.
void MDCallback(void* cbData, const char* type, bool isUnicode, const char* string)
{
const char* ptr = reinterpret_cast<const char*>(cbData);
(void)isUnicode; // Punt this ball for now
// Note that the type and string may be in PROGMEM, so copy them to RAM for printf
char s1[32], s2[64];
strncpy_P(s1, type, sizeof(s1));
s1[sizeof(s1) - 1] = 0;
strncpy_P(s2, string, sizeof(s2));
s2[sizeof(s2) - 1] = 0;
Serial.printf("METADATA(%s) '%s' = '%s'\n", ptr, s1, s2);
Serial.flush();
}

// Called when there's a warning or error (like a buffer underflow or decode hiccup)
void StatusCallback(void* cbData, int code, const char* string)
{
const char* ptr = reinterpret_cast<const char*>(cbData);
// Note that the string may be in PROGMEM, so copy it to RAM for printf
char s1[64];
strncpy_P(s1, string, sizeof(s1));
s1[sizeof(s1) - 1] = 0;
Serial.printf("STATUS(%s) '%d' = '%s'\n", ptr, code, s1);
Serial.flush();
}

Thanks for the help
All the best
Francisco

Hello friends, I have a question:
Is it possible to configure the system, so that it turns on when we switch on the power supply again?

Thanks and best regards