/**
   * @fn begin
   * @brief Init communication port
   * @return true or false
   */
  virtual bool begin(void);

  /**
   * @fn autoExitWakeup
   * @brief Set whether to automatically exit the wakeup state. By default, the
   * @n system automatically exits the wakeup state in 10 seconds.
   * @param mode - true : Automatically exits the wake up state;
   * @n            false : Do not exit the wake up state
   * @return None
   */
  void autoExitWakeup(bool mode);

  /**
   * @fn readEntryID
   * @brief Read the ID corresponding to the entry recognized by the voice recognition module
   * @return  ID
   */
  uint16_t readEntryID(void);
  
  /**
   * @fn sendInfo
   * @brief Send single data of char type
   * @param id correspond to the entry
   * @param data Parameters required for the answer to the question of corresponding entry
   * @return 0 for success
   */
  uint8_t sendInfo(uint8_t id,char data);

  /**
   * @fn sendInfo
   * @brief Send single data of int type
   * @param id correspond to the entry
   * @param data Parameters required for the answer to the question of corresponding entry
   * @return 0 for success
   */
  uint8_t sendInfo(uint8_t id,int data);

  /**
   * @fn sendInfo
   * @brief Send single data of double type
   * @param id correspond to the entry
   * @param data Parameters required for the answer to the question of corresponding entry
   * @return 0 for success
   */
  uint8_t sendInfo(uint8_t id,double data);

  /**
   * @fn sendInfo
   * @brief Send single data of unsigned char type
   * @param id correspond to the entry
   * @param data Parameters required for the answer to the question of corresponding entry
   * @return 0 for success
   */
  uint8_t sendInfo(uint8_t id,unsigned char data);

  /**
   * @fn send
   * @brief Send multiple data, which can be in different data types
   * @param id correspond to the entry
   * @param s The data types of different data
   * @n (...) represents changeable parameter, i.e. the answer requires multiple parameters.
   * @return 0 for success
   */
  uint8_t send(uint8_t id, char *s, ...);