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

#include "EmonLib.h"                   // Include Emon Library
EnergyMonitor emon1;                   // Create an instance

// DEMUX 
#define MUX_A D5
#define MUX_B D6
#define MUX_C D7

void setup()
{  
  Serial.begin(9600);
   pinMode(MUX_A, OUTPUT);
  pinMode(MUX_B, OUTPUT);     
  pinMode(MUX_C, OUTPUT);
  emon1.current(0, 60);             // Current: input pin, calibration.
}
void changeMux(int c, int b, int a) {
  digitalWrite(MUX_A, a);
  digitalWrite(MUX_B, b);
  digitalWrite(MUX_C, c);
  delay(200);
}

void loop()
{
  changeMux(LOW, LOW, LOW);
  delay(1000);

  double Irms = emon1.calcIrms(1480);  // Calculate Irms only
    Serial.print(" 1 === ");
Irms = emon1.calcIrms(1480);
Irms = emon1.calcIrms(1480);
  Serial.print(Irms*230.0);	       // Apparent power
  Serial.print(" === ");
  Serial.println(Irms);		       // Irms
 changeMux(HIGH, HIGH, HIGH);

  delay(1000);

  Irms = emon1.calcIrms(1480);  // Calculate Irms only
    Serial.print(" 2 === ");
Irms = emon1.calcIrms(1480);
Irms = emon1.calcIrms(1480);
  Serial.print(Irms*230.0);         // Apparent power
  Serial.print(" === ");
  Serial.println(Irms);          // Irms
  delay(1000);
}