Add emon lib for a later non invasive current sensor.

2014-08-17 22:27:08 +02:00
parent 426123333c
commit 5d43706492
5 changed files with 417 additions and 0 deletions
@@ -0,0 +1,89 @@
+/*
+  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
+*/
+
+#ifndef EmonLib_h
+#define EmonLib_h
+
+#if defined(ARDUINO) && ARDUINO >= 100
+
+#include "Arduino.h"
+
+#else
+
+#include "WProgram.h"
+
+#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(int _inPinV, double _VCAL, double _PHASECAL);
+    void current(int _inPinI, double _ICAL);
+
+    void voltageTX(double _VCAL, double _PHASECAL);
+    void currentTX(int _channel, double _ICAL);
+
+    void calcVI(int crossings, int timeout);
+    double calcIrms(int NUMBER_OF_SAMPLES);
+    void serialprint();
+
+    long readVcc();
+    //Useful value variables
+    double realPower,
+       apparentPower,
+       powerFactor,
+       Vrms,
+       Irms;
+
+  private:
+
+    //Set Voltage and current input pins
+    int inPinV;
+    int inPinI;
+    //Calibration coeficients
+    //These need to be set in order to obtain accurate results
+    double VCAL;
+    double ICAL;
+    double PHASECAL;
+
+    //--------------------------------------------------------------------------------------
+    // Variable declaration for emon_calc procedure
+    //--------------------------------------------------------------------------------------
+	int lastSampleV,sampleV;   //sample_ holds the raw analog read value, lastSample_ holds the last sample
+	int lastSampleI,sampleI;                      
+
+	double lastFilteredV,filteredV;                   //Filtered_ is the raw analog value minus the DC offset
+	double lastFilteredI, filteredI;                  
+
+	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.
+	int crossCount;                                   // ''
+
+
+};
+
+#endif