#include <LiquidCrystal.h>

Décl des pins const int sensorPin = A0; const int switchPin = 13 ; int previousTmpSensorVal = 0 ; float voltage = 0.0; float temperatureC = 0.0; int switchState = 0 ; Constantes du LCD

 const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
 LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

void setup() {

pinMode(13, INPUT);
lcd.begin(16,2);
lcd.print("Affichage");
lcd.setCursor(0,1);
lcd.print("Temperature");
delay(1000);

Reinitialisation LCD lcd.clear(); } void loop() { Lecture de la valeur du capteur

  int tmpSensorVal = analogRead(sensorPin); 

Lecture de l'interrupteur switchState = digitalRead(switchPin); lcd.setCursor(15,1); lcd.print(switchState); Valeurx Fixes du LCD

      lcd.setCursor(8,0);
      lcd.print("V:");   
      lcd.setCursor(0,1);
      lcd.print("Temp.:");   
      lcd.setCursor(12,1);
      lcd.print("C");

// Si changement capteur, on (re)calcule la temperature
     if (tmpSensorVal != previousTmpSensorVal )  {
     // Calcul du volatge et conversion en degré Celsius
        voltage = tmpSensorVal * 5.0;
        voltage /= 1024.0;
        temperatureC = (voltage - 0.5) * 100 ;
        previousTmpSensorVal = tmpSensorVal ;
        }
// Affichage sur demande (appui switch)   
     if (switchState == 1) {
         // Affichage LCD
            lcd.display();
            lcd.setCursor(0,0);
            lcd.print(tmpSensorVal);
            lcd.setCursor(10,0);
            lcd.print(voltage);
            lcd.setCursor(7,1);
            lcd.print(temperatureC);   
            delay(10000);
         } else { // On éteint le LCD
            lcd.noDisplay();
         }

delay(500); }