/**
   * @fn begin
   * @brief initialization function
   * @return int type, means returning initialization status
   * @retval 0 NO_ERROR
   * @retval -1 ERR_DATA_BUS
   * @retval -2 ERR_IC_VERSION
   */
  virtual int begin(void);

  /**
   * @fn refreshBasicInfo
   * @brief retrieve the basic information from the sensor and buffer it into the structure that stores information:
   * @n       I2C interface mode: addr_I2C, PID_I2C, VID_I2C
   * @n       RTU interface mode: PID_RTU, VID_RTU, addr_RTU, baudrate_RTU, checkbit_RTU, stopbit_RTU
   * @return None
   */
  void refreshBasicInfo(void);

  /**
   * @fn setADDR
   * @brief set the module communication address, power off to save the settings, and restart for the settings to take effect
   * @param addr device address to be set, I2C address range(1~127 is 0x01~0x7F), RTU address range(1~247 is 0x0001-0x00F7)
   * @return None
   */
  void setADDR(uint8_t addr);

  /**
   * @fn getDistanceCm
   * @brief read the current distance value, the value of zero indicates it’s not measured within the range
   * @return the current distance value, unit is cm, large range(40 - 900cm)small range(15-150cm)
   */
  uint16_t getDistanceCm(void);

  /**
   * @fn getInternalTempretureC
   * @brief read the current internal temperature
   * @return the current internal temperature value, unit is ℃, resolution is 0.1℃, signed number
   */
  float getInternalTempretureC(void);

  /**
   * @fn setExternalTempretureC
   * @brief write ambient temperature data for external temperature compensation, the setting is invalid when out of range
   * @param temp written ambient temperature data, unit is ℃, resolution is 0.1℃, signed number, range:-10℃～＋70℃
   * @return None
   */
  void setExternalTempretureC(float temp);

  /**
   * @fn setMeasureMode
   * @brief set measure mode
   * @param mode measure mode to be set, the following patterns constitute mode:
   * @n       eInternalTemp: use internal temperature compensation function, eExternalTemp: use external temperature compensation function (users need to write external temperature)
   * @n       eTempCompModeEn: enable temperature compensation function, eTempCompModeDis: disable temperature compensation function
   * @n       eAutoMeasureModeEn: automatic ranging, eAutoMeasureModeDis: passive ranging
   * @n       eMeasureRangeModeLong: large range measurement(40 - 900cm), eMeasureRangeModeShort: small range measurement(15-150cm)
   * @return None
   */
  void setMeasureMode(uint8_t mode);

  /**
   * @fn passiveMeasurementTRIG
   * @brief the function to trigger measuring in passive measurement mode
   * @n in passive measurement mode, the function is called once, the ranging command is sent once, and the module measures the distance once and saves the measured value into the distance register
   * @return None
   */
  void passiveMeasurementTRIG(void);

  /**
   * @fn getNoiseLevel
   * @brief get noise level of power supply, the smaller the noise level, the more accurate the distance value obtained by the sensor
   * @return the parameter indicates the influence of power supply and environment on the sensor. 0x00-0x0A matches noise level of 0-10.
   */
  uint8_t getNoiseLevel(void);

  /**
   * @fn setMeasureSensitivity
   * @brief ranging sensitivity setting, 0x00-0x0A:sensitivity level is 0-10
   * @param mode to set the sensor ranging sensitivity in large range (40-900cm), the smaller the value, and the higher the sensitivity, power off to save the settings, and it takes effect at once
   * @return None
   */
  void setMeasureSensitivity(uint8_t mode);

  /**
   * @fn setBaudrateMode
   * @brief UART interface mode, set the module baud rate, power off to save the settings, and restart for the settings to take effect
   * @param mode the baud rate to be set:
   * @n     eBaudrate2400---2400, eBaudrate4800---4800, eBaudrate9600---9600, 
   * @n     eBaudrate14400---14400, eBaudrate19200---19200, eBaudrate38400---38400, 
   * @n     eBaudrate57600---57600, eBaudrate115200---115200
   * @return None
   */
  void setBaudrateMode(eBaudrateMode_t mode);

  /**
   * @fn setCheckbitStopbit
   * @brief UART interface mode, set check bit and stop bit of the module
   * @param mode the mode to be set, the following patterns constitute mode:
   * @n     check bit:
   * @n           eCheckBitNone
   * @n           eCheckBitEven
   * @n           eCheckBitOdd
   * @n     stop bit:
   * @n           eStopBit0P5
   * @n           eStopBit1
   * @n           eStopBit1P5
   * @n           eStopBit2
   * @return None
   */
  void setCheckbitStopbit(uint16_t mode);