PT100.h

/*
  PT100.h - Library for measuring temperature with a PT100.
  Created by João Lino, June 24, 2015.
  Released into the public domain.
*/
#ifndef PT100_h
#define PT100_h

#include "Arduino.h"

#define DEBUG

#define CONSTANT_ADC_STEP_COUNT 	1024.0

#define TEMPERATURE_AVERAGE_VALUE_I				50
#define TEMPERATURE_AVERAGE_VALUE_F 			50.0
//#define TEMPERATURE_AVERATE_INIT_VALUES		0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0
#define TEMPERATURE_AVERATE_INIT_VALUES		0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0
#define TEMPERATURE_AVERATE_INIT_VALUES_I		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
#define TEMPERATURE_SETTING_MAX_VALUE 		120

class PT100
{
  public:
		// PT100(PT100_OUTPUT_PIN, PT100_INPUT_PIN, PT100_TIME_BETWEEN_READINGS, PT100_DEFAULT_ADC_VMAX, PT100_DEFAULT_VS, PT100_DEFAULT_R1_RESISTENCE, PT100_DEFAULT_LINE_RESISTENCE, PT100_DEFAULT_OPERATION_RESISTENCE);
    PT100(char *name,
    				int OutputPin_SensorPower, 
					int InputPin_TemperatureReading, 
					int TimeBetweenReadings = 100, 
					float ADCVmax = 1.081, 
					float Vs = 4.87,
					float R1 = 606.0);
    
		void setPower(float ADCVmax = 1.081, float Vs = 4.87);

		void measure(boolean ln);
		void safeHardwarePowerOff();
		
		float getCurrentTemperature();

		float getMeasuredTemperatureDeviation();
		float setMeasuredTemperatureDeviation( float measuredTemperatureDeviation);

		float setSampleDeviation( float sampleDeviation);
  
	private:
		char			*_name;
		int 			_OutputPin_SensorPower; 
		int 			_InputPin_TemperatureReading;
		int 			_TimeBetweenReadings;
		float 			_ADCVmax;
		float			_Vs;
		float 			_R1;
		
		float           _temperatureAverage;
		float           _measuredTemperature;
		float			_measuredTemperatureDeviation;
		float			_sampleDeviation;
		unsigned long   _lastTemperatureRead;
		int           	_VoutAnalogSample;
		int           	_VoutRAnalogSample;
		float           _VoutPreviousAnalogSample;
		int             _temperatureMeasurementsMarker;
		int             _rPT100MeasurementsMarker;
		float           _temperatureMeasurements[TEMPERATURE_AVERAGE_VALUE_I] = {TEMPERATURE_AVERATE_INIT_VALUES};
		int           	_rPT100Measurements[TEMPERATURE_AVERAGE_VALUE_I] = {TEMPERATURE_AVERATE_INIT_VALUES_I};

		float GetMedian(int array[]);
		float GetMode(float array[]);
};

#endif