Reply to Atomic Audio Base with M5ATOMS3R on Thu, 23 Apr 2026 01:58:31 GMT

jimruxton — Thu, 23 Apr 2026 01:58:31 GMT

A quick update. If I use the version of the M5Atomic-EchoBase library on github I no longer have the issue with i2s conflicts between that library and M5Unified. So anyone using these 2 libraries together be sure to use the github version and not the version currently showing up in the Arduino Library Manager.

Reply to Atomic Audio Base with M5ATOMS3R on Wed, 22 Apr 2026 20:42:20 GMT

jimruxton — Wed, 22 Apr 2026 20:42:20 GMT

The AtomS3R and Atomic Audio Base will work using the RecordPlay example in https://github.com/m5stack/M5Atomic-EchoBase/tree/main/example . Whenever I try to include both M5Unified.h and M5EchoBase in the same sketch I get the i2s conflict between new and legacy i2s drivers . I cant get any sound however when using just the M5Unified.h library. Below is my latest code. Still no sound?

#include "M5Unified.h"
#include 
// Define buffer size (200KB for ESP32-S3)
#define RECORD_SIZE (1024 * 200)
static uint8_t *buffer = nullptr;

void initES8311() {
  // AtomS3R I2C pins for the Audio Base are SDA=38, SCL=39
  Wire.begin(38, 39);

  // Helper to write to ES8311 registers
  auto writeReg = [](uint8_t reg, uint8_t val) {
    Wire.beginTransmission(0x18);  // Default ES8311 I2C address
    Wire.write(reg);
    Wire.write(val);
    Wire.endTransmission();
  };

  // --- ES8311 Initialization Sequence ---
  writeReg(0x00, 0x00);  // Reset
  writeReg(0x01, 0x3F);  // Power down all
  writeReg(0x0D, 0x01);  // Clock on
  writeReg(0x01, 0x03);  // Power up
  writeReg(0x02, 0x00);  // Master clock
  writeReg(0x05, 0x00);  // DAC power
  writeReg(0x04, 0x00);  // ADC power
  writeReg(0x14, 0x24);  // Set MIC gain
  writeReg(0x46, 0xFF);  // Set Speaker Volume to Max
  writeReg(0x06, 0x00);  // ADC Mute Off
  writeReg(0x09, 0x00);  // Set ADC to I2S format

  Serial.println("ES8311 Codec Initialized!");
}


void setup() {
  Serial.begin(115200);


  auto cfg = M5.config();
  // Enable external I2C for ES8311 codec on the audio base
  cfg.external_imu = false;

  M5.begin(cfg);
  initES8311();

  M5.Display.setFont(&fonts::FreeMonoBold9pt7b);


  // --------------------------
  // Speaker Configuration (I2S Output)
  // AtomS3R I2S pins: BCK=8, WS=6, DOUT=5
  // --------------------------
  auto spk_cfg = M5.Speaker.config();
  spk_cfg.pin_data_out = 5;
  spk_cfg.pin_bck = 8;
  spk_cfg.pin_ws = 6;
  spk_cfg.sample_rate = 44100;
  // spk_cfg.i2s_port     = I2S_NUM_0;
  spk_cfg.stereo = false;  // Use mono for the base speaker
  M5.Speaker.config(spk_cfg);
  M5.Speaker.begin();

  // --------------------------
  // Microphone Configuration (I2S Input)
  // AtomS3R I2S pins: BCK=8, WS=6, DIN=7
  // --------------------------
  auto mic_cfg = M5.Mic.config();
  mic_cfg.pin_data_in = 7;
  mic_cfg.pin_bck = 8;
  mic_cfg.pin_ws = 6;
  mic_cfg.sample_rate = 44100;
  //  mic_cfg.i2s_port     = I2S_NUM_0; // Use separate I2S port for input
  mic_cfg.magnification = 2;
  M5.Mic.config(mic_cfg);
  M5.Mic.begin();

  // Set volume/gain
  M5.Speaker.setVolume(100);
  // For v0.2.14, set mic gain via config if needed (default works for most cases)
  mic_cfg.magnification = 2;

  // Allocate recording buffer
  buffer = (uint8_t *)malloc(RECORD_SIZE);
  if (buffer == nullptr) {
    Serial.println("Memory allocation failed!");
    while (true) delay(1000);
  }

  Serial.println("Device ready! Press button to record/play");

  M5.Display.println("Click to\nRecord & Play");
}

void loop() {
  M5.update();

  if (M5.BtnA.wasClicked()) {
    M5.Display.fillScreen(BLACK);
    M5.Display.setCursor(0, 0);

    // --------------------------
    // Recording
    // --------------------------
    M5.Display.println("Recording...");
    Serial.println("Start recording");
    M5.Mic.record(buffer, RECORD_SIZE, 44100);
    delay(500);
    Serial.println(M5.Mic.isRecording());
    delay(3000);
    // while (M5.Mic.isRecording()==1) delay(10);

    // --------------------------
    // Playback
    // --------------------------
    M5.Display.println("Playing...");
    Serial.println("Start playing");
    M5.Speaker.playRaw(buffer, RECORD_SIZE, 44100, false, 1);
    Serial.println(M5.Speaker.isRunning());
    while (M5.Speaker.isPlaying()) delay(10);

    M5.Display.println("Done");
    Serial.println("Done");
  }
}