90 lines
2.4 KiB
C++
90 lines
2.4 KiB
C++
/*
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Emon.h - Library for openenergymonitor
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Created by Trystan Lea, April 27 2010
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GNU GPL
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modified to use up to 12 bits ADC resolution (ex. Arduino Due)
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by boredman@boredomprojects.net 26.12.2013
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*/
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#ifndef EmonLib_h
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#define EmonLib_h
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#if defined(ARDUINO) && ARDUINO >= 100
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#include "Arduino.h"
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#else
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#include "WProgram.h"
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#endif
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// to enable 12-bit ADC resolution on Arduino Due,
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// include the following line in main sketch inside setup() function:
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// analogReadResolution(ADC_BITS);
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// otherwise will default to 10 bits, as in regular Arduino-based boards.
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#if defined(__arm__)
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#define ADC_BITS 12
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#else
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#define ADC_BITS 10
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#endif
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#define ADC_COUNTS (1<<ADC_BITS)
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class EnergyMonitor
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{
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public:
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void voltage(int _inPinV, double _VCAL, double _PHASECAL);
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void current(int _inPinI, double _ICAL);
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void voltageTX(double _VCAL, double _PHASECAL);
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void currentTX(int _channel, double _ICAL);
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void calcVI(int crossings, int timeout);
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double calcIrms(int NUMBER_OF_SAMPLES);
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void serialprint();
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long readVcc();
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//Useful value variables
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double realPower,
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apparentPower,
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powerFactor,
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Vrms,
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Irms;
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private:
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//Set Voltage and current input pins
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int inPinV;
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int inPinI;
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//Calibration coeficients
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//These need to be set in order to obtain accurate results
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double VCAL;
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double ICAL;
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double PHASECAL;
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//--------------------------------------------------------------------------------------
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// Variable declaration for emon_calc procedure
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//--------------------------------------------------------------------------------------
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int lastSampleV,sampleV; //sample_ holds the raw analog read value, lastSample_ holds the last sample
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int lastSampleI,sampleI;
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double lastFilteredV,filteredV; //Filtered_ is the raw analog value minus the DC offset
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double lastFilteredI, filteredI;
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double phaseShiftedV; //Holds the calibrated phase shifted voltage.
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double sqV,sumV,sqI,sumI,instP,sumP; //sq = squared, sum = Sum, inst = instantaneous
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int startV; //Instantaneous voltage at start of sample window.
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boolean lastVCross, checkVCross; //Used to measure number of times threshold is crossed.
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int crossCount; // ''
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};
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#endif
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