#include <LiquidCrystal_PCF8574.h>
#include <Wire.h>
#include <OneWire.h>
#include <DallasTemperature.h>

LiquidCrystal_PCF8574 lcd(0x27);

#define ONE_WIRE_BUS 4
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
float tempC;
char grados = 223;

#define PIN_I0 18
#define PIN_I1 19
#define PIN_I2 23

#define I0 !digitalRead(PIN_I0)
#define I1 !digitalRead(PIN_I1)
#define I2 !digitalRead(PIN_I2)

#define Q0 15
#define Q1 2
#define Q2 5

char texto[] = "I/O digitales";

byte alto [] = {
  0b0000,
  0b1111,
  0b1111,
  0b1111,
  0b1111,
  0b1111,
  0b1111,
  0b0000
};

byte bajo [] = {
  0b0000,
  0b1111,
  0b1001,
  0b1001,
  0b1001,
  0b1001,
  0b1111,
  0b0000
};

void setup() {
  pinMode(PIN_I0, INPUT_PULLUP);
  pinMode(PIN_I1, INPUT_PULLUP);
  pinMode(PIN_I2, INPUT_PULLUP);
  pinMode(Q0, OUTPUT);
  pinMode(Q1, OUTPUT);
  pinMode(Q2, OUTPUT);
  
  int error;
  sensors.begin();

  lcd.begin(20, 4);
  lcd.createChar(0, bajo);
  lcd.createChar(1, alto);
  delay(200);
  lcd.setBacklight(255);
  lcd.setCursor(8,2);
  lcd.print("Temperatura:");

}

void loop() {
  estados();
  sensor();
  digitalWrite(Q0, I0);
  digitalWrite(Q1, I1);
  digitalWrite(Q2, I2);
}

void estados() {
  lcd.setCursor(0,0);
  lcd.print(texto);
  lcd.setCursor(0,1);
  lcd.print("I: ");
  lcd.write(I0);
  lcd.write(I1);
  lcd.write(I2);
  lcd.setCursor(0,2);
  lcd.print("   012");
  lcd.setCursor(0,3);
  lcd.print("Q: ");
  lcd.write(digitalRead(Q0));
  lcd.write(digitalRead(Q1));
  lcd.write(digitalRead(Q2));
}

void sensor() {
  sensors.requestTemperatures();
  tempC=sensors.getTempCByIndex(0);

  if(tempC != DEVICE_DISCONNECTED_C)
  {
    lcd.setCursor(12,3);
    lcd.print(tempC,1);
    lcd.print((char)grados);
    lcd.print("C  ");
  }
  else
  {
    lcd.setCursor(12,3);
    lcd.print("error!");  
  }
}