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#include "EmonLib.h"  // Include Emon Library
EnergyMonitor emon1;  // Create an instance
// include LCD the library:  
#include <LiquidCrystal.h>   
  // initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);   
void setup()   
{  
  Serial.begin(9600);   // set up the LCD’s number of columns and rows:
  lcd.begin(20, 4);  
  emon1.voltage(2, 234.26, 1.7);  // Voltage: input pin, calibration, phase_shift
  emon1.current(1, 111.1);  // Current: input pin, calibration.
}  
void loop()  
{  
  emon1.calcVI(20,2000);  // Calculate all. No.of half wavelengths (crossings), time-out
  emon1.serialprint();  // Print out all variables (realpower, apparent power, Vrms, Irms, power factor)
    unsigned int long timemillis=millis();  //keeping the track of the time since the device is switched ON
  unsigned int long time=timemillis/1000;  
   float realPower       = emon1.realPower; //extract Real Power into variable
  float apparentPower   = emon1.apparentPower;  //extract Apparent Power into variable
  float powerFactor=emon1.powerFactor;//extract Apparent Power into variable rFactor     = emon1.powerFactor; //extract Power Factor into Variable
  float supplyVoltage   = emon1.Vrms; //extract Irms into Variable
  float Irms            = emon1.Irms;  
  //displaying the values
lcd.setCursor(1,0);  
lcd.print("Energy Monitor");   
lcd.setCursor(0,1);  
lcd.print("V=");   
lcd.print(supplyVoltage);  
lcd.setCursor(9,1);  
lcd.print("I=");   
lcd.print(Irms);   
lcd.setCursor(-4,2);  
lcd.print("PowerFactor=");  
lcd.print(powerFactor);  
lcd.setCursor(-4,3);  
lcd.print("Units(kWh)=");  
lcd.print(abs(realPower*time)/abs(1000*3600));
lcd.setCursor(-4,4);
lcd.print("(kW)=");   
lcd.print(realPower/1000);    
lcd.setCursor(-4,5);   
lcd.print("(KVA)=");    
lcd.print(apparentPower/1000);    
lcd.setCursor(-4,6);   
lcd.print("(KVAR)=");   
lcd.print((sqrt((apparentPower*apparentPower)-(realPower*realPower)))/1000);    
}