/ EmonLibrary examples openenergymonitor.org, Licence GNU GPL V3

       #include "EmonLib.h"                   // Include Emon Library
       EnergyMonitor emon1;                   // Create an instance
       #include <LiquidCrystal.h>
       LiquidCrystal lcd(12,11,5,4,3,2);
      
       int Lampe = 8;
       int Aspi = 9;
      
       void setup()
       {  
        Serial.begin(9600);
        pinMode(Lampe, OUTPUT);
        emon1.current(1, 111.1);             // Current: input pin, calibration.
        lcd.begin(16,2);
        lcd.clear(); // on efface l'écran
      }
      
       void loop()
       {
        double Irms = emon1.calcIrms(1480);  // Calculate Irms only
        
       // Serial.print(Irms*230.0);	       // Apparent power
       //  Serial.print(" ");
        //Serial.println(Irms);       // Irms
        delay(500); 
        lcd.begin(16,2);
        lcd.clear(); // on efface l'écran
      
       if (Irms*230 > 230) {
      
      
        lcd.print("MOTEUR EN MARCHE ");
        lcd.setCursor(0,1); //on passe à la ligne suivante
        lcd.print("P = ");
        lcd.print(Irms*230); // on finit d'écrire
        lcd.print(" W");
       digitalWrite(Lampe, LOW);   // turn the LED on (HIGH is the voltage level)
       digitalWrite(Aspi, LOW);
         }
        
       else {
        digitalWrite(Lampe, HIGH);   // turn the LED on (HIGH is the voltage level)
        digitalWrite(Aspi, HIGH);
        lcd.print("MOTEUR A L'ARRET"); // on écrit Bonjour
        lcd.setCursor(0,1); //on passe à la ligne suivante
        lcd.print("P = ");
        lcd.print(Irms*230); // on finit d'écrire
        lcd.print(" W");
        }
       }