energy_monitor.ino

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

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

#define VOLT_CAL 333.1
#define CURRENT_CAL 61.6

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");
}