Arduino Thermometer using a 16x2 LCD and a LM35 sensor.

TermometroLCD2.ino

// TermometroLCD2.ino
#include <LiquidCrystal.h>
#include <EEPROM.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

int temperatura = 0;
int tempmax;
int tempmin;
int voltage;
void setup() {
  lcd.begin(16, 2);
}
void scriviEEPROM(int i, boolean minimo){
  if(minimo){
    EEPROM.write(0, i);
  }else{
     EEPROM.write(1, i);
  }
}
void leggiEEPROM(){
    tempmin = EEPROM.read(0);
    tempmax = EEPROM.read(1);
}

void loop() {
  voltage = analogRead(0);
  temperatura = voltage/9.8;
  if(temperatura > tempmax){
   scriviEEPROM(temperatura, false);
  }
  if(temperatura < tempmin){
   scriviEEPROM(temperatura, true);
  }
  if(tempmin = 0){
    tempmin = temperatura;
  }
  leggiEEPROM();
  lcd.print(“Live:”);
  lcd.print(temperatura);
  lcd.write(B11011111);
  lcd.setCursor(0,1);
  lcd.print(“Min:”);
  lcd.print(tempmin);
  lcd.write(B11011111);
  lcd.setCursor(9,1);
  lcd.print(“Max:”);
  lcd.print(tempmax);
  lcd.write(B11011111);
  delay(2000);
  lcd.clear();
}