101 lines
3.0 KiB
C
101 lines
3.0 KiB
C
|
/*
|
||
|
|
Emon.h - Library for openenergymonitor
|
||
|
|
Created by Trystan Lea, April 27 2010
|
||
|
|
GNU GPL
|
||
|
|
modified to use up to 12 bits ADC resolution (ex. Arduino Due)
|
||
|
|
by boredman@boredomprojects.net 26.12.2013
|
||
|
|
Low Pass filter for offset removal replaces HP filter 1/1/2015 - RW
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef EmonLib_h
|
||
|
|
#define EmonLib_h
|
||
|
|
|
||
|
|
#if defined(ARDUINO) && ARDUINO >= 100
|
||
|
|
|
||
|
|
#include "Arduino.h"
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
#include "WProgram.h"
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// define theoretical vref calibration constant for use in readvcc()
|
||
|
|
// 1100mV*1024 ADC steps http://openenergymonitor.org/emon/node/1186
|
||
|
|
// override in your code with value for your specific AVR chip
|
||
|
|
// determined by procedure described under "Calibrating the internal reference voltage" at
|
||
|
|
// http://openenergymonitor.org/emon/buildingblocks/calibration
|
||
|
|
#ifndef READVCC_CALIBRATION_CONST
|
||
|
|
#define READVCC_CALIBRATION_CONST 1126400L
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// to enable 12-bit ADC resolution on Arduino Due,
|
||
|
|
// include the following line in main sketch inside setup() function:
|
||
|
|
// analogReadResolution(ADC_BITS);
|
||
|
|
// otherwise will default to 10 bits, as in regular Arduino-based boards.
|
||
|
|
#if defined(__arm__)
|
||
|
|
#define ADC_BITS 12
|
||
|
|
#else
|
||
|
|
#define ADC_BITS 10
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define ADC_COUNTS (1<<ADC_BITS)
|
||
|
|
|
||
|
|
|
||
|
|
class EnergyMonitor
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
|
||
|
|
void voltage(unsigned int _inPinV, double _VCAL, double _PHASECAL);
|
||
|
|
void current(unsigned int _inPinI, double _ICAL);
|
||
|
|
|
||
|
|
void voltageTX(double _VCAL, double _PHASECAL);
|
||
|
|
void currentTX(unsigned int _channel, double _ICAL);
|
||
|
|
|
||
|
|
void calcVI(unsigned int crossings, unsigned int timeout);
|
||
|
|
double calcIrms(unsigned int NUMBER_OF_SAMPLES);
|
||
|
|
void serialprint();
|
||
|
|
|
||
|
|
long readVcc();
|
||
|
|
//Useful value variables
|
||
|
|
double realPower,
|
||
|
|
apparentPower,
|
||
|
|
powerFactor,
|
||
|
|
Vrms,
|
||
|
|
Irms;
|
||
|
|
|
||
|
|
private:
|
||
|
|
|
||
|
|
//Set Voltage and current input pins
|
||
|
|
unsigned int inPinV;
|
||
|
|
unsigned int inPinI;
|
||
|
|
//Calibration coefficients
|
||
|
|
//These need to be set in order to obtain accurate results
|
||
|
|
double VCAL;
|
||
|
|
double ICAL;
|
||
|
|
double PHASECAL;
|
||
|
|
|
||
|
|
//--------------------------------------------------------------------------------------
|
||
|
|
// Variable declaration for emon_calc procedure
|
||
|
|
//--------------------------------------------------------------------------------------
|
||
|
|
int sampleV; //sample_ holds the raw analog read value
|
||
|
|
int sampleI;
|
||
|
|
|
||
|
|
double lastFilteredV,filteredV; //Filtered_ is the raw analog value minus the DC offset
|
||
|
|
double filteredI;
|
||
|
|
double offsetV; //Low-pass filter output
|
||
|
|
double offsetI; //Low-pass filter output
|
||
|
|
|
||
|
|
double phaseShiftedV; //Holds the calibrated phase shifted voltage.
|
||
|
|
|
||
|
|
double sqV,sumV,sqI,sumI,instP,sumP; //sq = squared, sum = Sum, inst = instantaneous
|
||
|
|
|
||
|
|
int startV; //Instantaneous voltage at start of sample window.
|
||
|
|
|
||
|
|
boolean lastVCross, checkVCross; //Used to measure number of times threshold is crossed.
|
||
|
|
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif
|