ESP32 Forum

Code: Select all

void reader(void *pvParameters) {
  uint64_t read_sum;
  String for_send;
  // The 4 high bits are the channel, and the data is inverted
  uint16_t offset = (int)ADC_INPUT * 0x1000 + 0xFFF;
  size_t bytes_read;
  while (1) {
    uint16_t buffer[2] = {0};
    i2s_read(I2S_NUM_0, &buffer, sizeof(buffer), &bytes_read, 15);
    //Serial.printf("%d  %d  %d\n", offset - buffer[0], offset - buffer[1],offset - buffer[2]);
    if (bytes_read == sizeof(buffer)) {
      read_sum = offset - buffer[0];
      if (is_client == 1) {
        for_send = int64String(read_sum);
        webSocket.sendTXT(0, for_send);
      }
    } else {
      Serial.println("buffer empty");
    }
  }
}

void setup() {
  Serial.begin(115200);
  // Initialize the I2S peripheral
  i2sInit();
  // Create a task that will read the data
  xTaskCreatePinnedToCore(reader, "ADC_reader", 2048, NULL, 1, NULL, 0);

  // Print our IP address
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi..");
  }

  // Print ESP32 Local IP Address
  Serial.println(WiFi.localIP());

  // Start WebSocket server and assign callback
  webSocket.begin();
  webSocket.onEvent(onWebSocketEvent);
}

void loop() {
  // Look for and handle WebSocket data
  webSocket.loop();
}