Current sensor

// EmonLibrary examples openenergymonitor.org, Licence GNU GPL V3

#include "EmonLib.h"             // Include Emon Library



#define VOLT_CAL 148.7
#define CURRENT_CAL 62.6

EnergyMonitor emon1;             // Create an instance

void setup()
{
  Serial.begin(9600);

  emon1.voltage(1, VOLT_CAL, 1.7);  // Voltage: input pin, calibration, phase_shift
  emon1.current(0, CURRENT_CAL);       // Current: input pin, calibration.
}

void loop()
{
  emon1.calcVI(20,2000);         // Calculate all. No.of half wavelengths (crossings), time-out

  float currentDraw            = emon1.Irms;             //extract Irms into Variable
  float supplyVoltage   = emon1.Vrms;                    //extract Vrms into Variable

  Serial.print("Voltage: ");
  Serial.println(supplyVoltage);

  Serial.print("Current: ");
  Serial.println(currentDraw);

  Serial.print("Watts: ");
  Serial.println(currentDraw * supplyVoltage);
  Serial.println("\n\n");
}