#include "RTClib.h"
#include <LiquidCrystal_I2C.h>
#define I2C_ADDR 0x27
#define LCD_COLUMNS 20
#define LCD_LINES 4
LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

RTC_DS1307 rtc;

float t1, t2, t3, t4;

void setup () {
  Serial.begin(115200);

  lcd.init();
  lcd.backlight();

  if (! rtc.begin()) {
    Serial.println("RTC não identificado!");
    Serial.flush();
    abort();
  }

}

void loop () {
  DateTime now = rtc.now();

  lcd.setCursor(0,0);
  lcd.print("Sensores Temperatura");
  
  lcd.setCursor(0,1);
  lcd.print("Hora atual: ");
  lcd.print(now.hour(), DEC);
  lcd.print(':');
  lcd.print(now.minute(), DEC);
  lcd.print(':');
  lcd.print(now.second(), DEC);
  
const float BETA = 3950; // Deve corresponder ao coeficiente beta do termistor

int t1_analogico = analogRead(A0);
t1 = 1 / (log(1 / (1023. / t1_analogico - 1)) / BETA + 1.0 / 298.15) - 273.15;

int t2_analogico = analogRead(A1);
t2 = 1 / (log(1 / (1023. / t2_analogico - 1)) / BETA + 1.0 / 298.15) - 273.15;

int t3_analogico = analogRead(A2);
t3 = 1 / (log(1 / (1023. / t3_analogico - 1)) / BETA + 1.0 / 298.15) - 273.15;

int t4_analogico = analogRead(A3);
t4 = 1 / (log(1 / (1023. / t4_analogico - 1)) / BETA + 1.0 / 298.15) - 273.15;
  
  lcd.setCursor(0,2);
  lcd.print("T1: ");
  lcd.print(t1, 2);

  lcd.setCursor(0,3);
  lcd.print("T2: ");
  lcd.print(t2, 2);
  
  lcd.setCursor(11,2);
  lcd.print("T3: ");
  lcd.print(t3, 2);
  
  lcd.setCursor(11,3);
  lcd.print("T4: ");
  lcd.print(t4, 2);

  delay(1000);
}