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.pio/libdeps/esp32-s3-devkitc-1/ESP32-audioI2S/examples/ESP32-A1S/ESP32_A1S.ino

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+// found this sketch on https://www.mikrocontroller.net/topic/474383
+// thanks to Michael U. (amiga)
+
+#include "Arduino.h"
+#include "WiFi.h"
+#include "SPI.h"
+#include "SD.h"
+#include "FS.h"
+#include "Wire.h"
+#include "AC101.h" //https://github.com/schreibfaul1/AC101
+// #include "ES8388.h"  // https://github.com/maditnerd/es8388
+#include "Audio.h" //https://github.com/schreibfaul1/ESP32-audioI2S
+
+
+// SPI GPIOs
+#define SD_CS         13
+#define SPI_MOSI      15
+#define SPI_MISO       2
+#define SPI_SCK       14
+
+// I2S GPIOs, the names refer on AC101, AS1 Audio Kit V2.2 2379
+#define I2S_DSIN      25
+#define I2S_BCLK      27
+#define I2S_LRC       26
+#define I2S_MCLK       0
+#define I2S_DOUT      35
+
+// I2S GPIOs, the names refer on ES8388, AS1 Audio Kit V2.2 3378
+//#define I2S_DSIN    35
+//#define I2S_BCLK    27
+//#define I2S_LRC     25
+//#define I2S_MCLK     0
+//#define I2S_DOUT    26
+
+// I2C GPIOs
+#define IIC_CLK       32
+#define IIC_DATA      33
+
+// buttons
+// #define BUTTON_2_PIN 13             // shared mit SPI_CS
+#define BUTTON_3_PIN  19
+#define BUTTON_4_PIN  23
+#define BUTTON_5_PIN  18               // Stop
+#define BUTTON_6_PIN   5               // Play
+
+// amplifier enable
+#define GPIO_PA_EN    21
+
+//Switch S1: 1-OFF, 2-ON, 3-ON, 4-OFF, 5-OFF
+
+String ssid =     "xxxxxxxxx";
+String password = "xxxxxxxxx";
+
+static AC101 dac;                                 // AC101
+//    ES8388 dac;                                 // ES8388 (new board)
+int volume = 40;                                  // 0...100
+
+Audio audio;
+
+//#####################################################################
+
+void setup()
+{
+  Serial.begin(115200);
+  Serial.println("\r\nReset");
+  Serial.printf_P(PSTR("Free mem=%d\n"), ESP.getFreeHeap());
+
+  pinMode(SD_CS, OUTPUT);
+  digitalWrite(SD_CS, HIGH);
+  SPI.begin(SPI_SCK, SPI_MISO, SPI_MOSI);
+  SPI.setFrequency(1000000);
+
+  SD.begin(SD_CS);
+
+  WiFi.mode(WIFI_STA);
+  WiFi.begin(ssid.c_str(), password.c_str());
+
+  while (WiFi.status() != WL_CONNECTED)
+  {
+    Serial.print(".");
+    delay(100);
+  }
+
+  Serial.printf_P(PSTR("Connected\r\nRSSI: "));
+  Serial.print(WiFi.RSSI());
+  Serial.print(" IP: ");
+  Serial.println(WiFi.localIP());
+
+    Serial.printf("Connect to DAC codec... ");
+    while (not dac.begin(IIC_DATA, IIC_CLK))
+    {
+        Serial.printf("Failed!\n");
+        delay(1000);
+    }
+    Serial.printf("OK\n");
+
+    dac.SetVolumeSpeaker(volume);
+    dac.SetVolumeHeadphone(volume);
+//  ac.DumpRegisters();
+
+    // Enable amplifier
+    pinMode(GPIO_PA_EN, OUTPUT);
+    digitalWrite(GPIO_PA_EN, HIGH);
+
+    // set I2S_MasterClock
+    audio.i2s_mclk_pin_select(I2S_MCLK);
+
+    audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DSIN);
+    audio.setVolume(10); // 0...21
+
+    audio.connecttoFS(SD, "/320k_test.mp3");
+//  audio.connecttoSD("/Banana Boat Song - Harry Belafonte.mp3");
+//  audio.connecttohost("http://mp3channels.webradio.antenne.de:80/oldies-but-goldies");
+//  audio.connecttohost("http://dg-rbb-http-dus-dtag-cdn.cast.addradio.de/rbb/antennebrandenburg/live/mp3/128/stream.mp3");
+//  audio.connecttospeech("Wenn die Hunde schlafen, kann der Wolf gut Schafe stehlen.", "de");
+
+}
+
+//-----------------------------------------------------------------------
+
+void loop()
+{
+    audio.loop();
+}
+
+// optional
+void audio_info(const char *info){
+    Serial.print("info        "); Serial.println(info);
+}
+void audio_id3data(const char *info){  //id3 metadata
+    Serial.print("id3data     ");Serial.println(info);
+}
+void audio_eof_mp3(const char *info){  //end of file
+    Serial.print("eof_mp3     ");Serial.println(info);
+}
+void audio_showstation(const char *info){
+    Serial.print("station     ");Serial.println(info);
+}
+void audio_showstreamtitle(const char *info){
+    Serial.print("streamtitle ");Serial.println(info);
+}
+void audio_bitrate(const char *info){
+    Serial.print("bitrate     ");Serial.println(info);
+}
+void audio_commercial(const char *info){  //duration in sec
+    Serial.print("commercial  ");Serial.println(info);
+}
+void audio_icyurl(const char *info){  //homepage
+    Serial.print("icyurl      ");Serial.println(info);
+}
+void audio_lasthost(const char *info){  //stream URL played
+    Serial.print("lasthost    ");Serial.println(info);
+}
+void audio_eof_speech(const char *info){
+    Serial.print("eof_speech  ");Serial.println(info);
+}