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.pio/libdeps/esp32-s3-devkitc-1/ESP32-audioI2S/examples/M5StackNode/M5StackNode.ino

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+
+// M5Stack Node support
+// thanks to Cellie - issue #35     25.Apr.2020
+// M5Stack board with Node base also need a MCLK signal on GPIO0.
+
+#include <wm8978.h> /* https://github.com/CelliesProjects/wm8978-esp32 */
+#include <Audio.h> /* https://github.com/schreibfaul1/ESP32-audioI2S */
+
+/* M5Stack Node WM8978 I2C pins */
+#define I2C_SDA     21
+#define I2C_SCL     22
+
+/* M5Stack Node I2S pins */
+#define I2S_BCK      5
+#define I2S_WS      13
+#define I2S_DOUT     2
+#define I2S_DIN     34
+
+/* M5Stack WM8978 MCLK gpio number */
+#define I2S_MCLKPIN  0
+
+WM8978 dac;
+Audio audio;
+
+void setup() {
+  /* Setup wm8978 I2C interface */
+  if (!dac.begin(I2C_SDA, I2C_SCL)) {
+    ESP_LOGE(TAG, "Error setting up dac. System halted");
+    while (1) delay(100);
+  }
+
+  /* Setup wm8978 I2S interface */
+  audio.setPinout(I2S_BCK, I2S_WS, I2S_DOUT, I2S_DIN);
+
+  /* Setup wm8978 MCLK - for example M5Stack Node needs MCLK on GPIO 0 */
+  audio.i2s_mclk_pin_select(I2S_MCLKPIN);
+
+  WiFi.begin("xxx", "xxx");
+  while (!WiFi.isConnected()) {
+    delay(10);
+  }
+  ESP_LOGI(TAG, "Connected");
+
+  ESP_LOGI(TAG, "Starting MP3...\n");
+  audio.connecttohost("http://icecast.omroep.nl/3fm-bb-mp3");
+
+  dac.setSPKvol(40); /* max 63 */
+  dac.setHPvol(32, 32);
+}
+
+void loop() {
+  audio.loop();
+}