/* LM35 analog temperature sensor with I2C LCD and Arduino example code. More info: https://www.makerguides.com */
// Include the required Arduino libraries:
#include <LiquidCrystal_I2C.h>
// Create a new instance of the LiquidCrystal_I2C class:
LiquidCrystal_I2C lcd(0x27, 16, 2);
// Degree symbol:
byte Degree[] = {
 B00111,
 B00101,
 B00111,
 B00000,
 B00000,
 B00000,
 B00000,
 B00000
};
// Define to which pin of the Arduino the output of the LM35 is connected:
#define sensorPin A0
void setup() {
 // Start the LCD and turn on the backlight:
 lcd.init();
 lcd.backlight();
 // Create a custom character:
 lcd.createChar(0, Degree);
}
void loop() {
 // Get a reading from the temperature sensor:
int reading = analogRead(sensorPin);
 // Convert the reading into voltage:
float voltage = reading * (5000 / 1024.0);
 // Convert the voltage into the temperature in degree Celsius:
float temperature = voltage / 10;
 // Print the temperature on the LCD;
 lcd.setCursor(0,0);
 lcd.print("temperature:");
lcd.setCursor(0,1);
lcd.print(temperature) ;
lcd.write ( 0 ) ; // imprime le caractère personnalisé
lcd.print ( "C" ) ;
delay ( 1000 ) ; // attend une seconde entre les lectures
}