/*!
   * @fn DFRobot_EC10
   * @brief Constructor 
   */
  DFRobot_EC10();
  
  /*!
   * @fn ~DFRobot_EC10
   * @brief destructor 
   */
  ~DFRobot_EC10();

  /*!
   * @fn begin
   * @brief Init sensor 
   */
  void begin();
  
  /*!
   * @fn calibration
   * @brief Calibrate sensor. If the probe is used for the first time or hasn't been used for a long time, please calibrate it to improve accuracy. 
   * @param voltage  The voltage obtained when measuring standard buffer solution(12.88ms/cm)
   * @param temperature The calibration solution temperature 
   * @param cmd  Calibration command 
   */
  void calibration(float voltage, float temperature,char* cmd);
  
  /*!
   * @fn calibration
   * @brief Calibrate sensor. If the probe is used for the first time or hasn't been used for a long time, please calibrate it to improve accuracy. 
   * @param voltage The voltage obtained when measuring standard buffer solution(12.88ms/cm)
   * @param temperature The calibration solution temperature 
   */
  void calibration(float voltage, float temperature);   

  /*!
   * @fn readEC
   * @brief Get solution electrical conducitivity 
   * @param voltage  Measured analog voltage
   * @param temperature  Temeprature of the solution to be measured
   */
  float readEC(float voltage, float temperature);