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EMONLIB_DEMUX/EMONLIB_DEMUX.ino

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+// 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);
+}