DFrobot_MSM261

• 中文版

This is a microphone library that integrates functionalities for retrieving raw microphone data, storing microphone data on an SD card, and transmitting microphone data via Bluetooth.

Product Link (https://www.dfrobot.com)

SKU：SEN0526

Table of Contents

• Summary
• Installation
• Methods
• Compatibility
• History
• Credits

Summary

• Running the example allows real-time retrieval of microphone data.
• Running the example enables microphone data transmission via Bluetooth.
• Running the example can store audio data on an SD card.

Installation

To use this library, download the library file first, paste it into the \Arduino\libraries directory, then open the examples folder and run the demo in the folder.

Methods DFrobot_Microphone

  /**
     * @fn begin
     * @brief Initialize the device
     * @param baudRate Communication rate
     * @param bit Data bit width
     * @return Initialization status
     */
    uint8_t begin(uint16_t baudRate,uint8_t bit);

    /**
     * @fn read
     * @brief Obtain data returned by the microphone
     * @param buffer Buffer to store the acquired data
     * @param len    Length of the data to acquire
     * @return Length of the acquired data
     */
    uint32_t read(char* buffer,size_t len);

    /**
     * @fn createWavHeader
     * @brief Construct the header for a WAVE file
     * @param header The WAVE file header to construct
     * @param totalDataLen Length of the data to write
     * @param longSampleRate Sampling rate
     * @param channels Number of channels
     * @param byteRate Byte rate, calculated as: sampling rate × number of channels × data bit width ÷ 8
     * @param blockAlign Block alignment, calculated as: number of channels × data bit width ÷ 8
     * @return None
     */
    void createWavHeader(byte* header, int totalDataLen, int longSampleRate, uint8_t channels, int byteRate, uint8_t blockAlign);

Methods DFRobot_BluetoothA2DPSource

  /**
   * @fn begin
   * @brief Initializes Bluetooth and A2DP
   * @param name Name of the Bluetooth slave device to connect to
   * @param callback Callback function for A2DP data transmission
   * @param volume Volume level, range 0~100
   * @return Returns whether the initialization was successful
   * @retval true Initialization successful
   * @retval false Initialization failed
   */
  bool begin(const char* name, esp_a2d_source_data_cb_t callback,uint8_t volume);

Compatibility

MCU	Work Well	Work Wrong	Untested	Remarks
FireBeetle-ESP32	√

History

• 2022/03/03 - Version 1.0.0 released.

Credits

Written by TangJie([email protected]), 2022. (Welcome to our website)