#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <dht.h>

#define dataPin 2

LiquidCrystal_I2C lcd(0x27, 16, 2);

unsigned long millisAnteriorLCD = 0;
unsigned long millisAnteriorScroll = 0;

int LCD = 0;
int scroll = 0;


dht DHT;

void setup() {
  lcd.init();
  lcd.setBacklight(HIGH);

  Serial.begin(9600);
}

void loop() {
  unsigned long millisAtual = millis();

  int readData = DHT.read11(dataPin);
  float t = DHT.temperature;
  float h = DHT.humidity;
  
  if ((millisAtual - millisAnteriorLCD) >= 2000) {
    millisAnteriorLCD = millisAtual;

    if (LCD == 0) {
      lcd.clear();
      lcd.setCursor(5, 0);
      lcd.print("ETECAF");
      lcd.setCursor(5, 1);
      lcd.print("SEM II");

      Serial.println("ETECAF");
      Serial.println("SEM II");
      Serial.println("");

      LCD = 1;
    } 
    else if (LCD == 1) {
      lcd.clear();
      lcd.setCursor(16, 0);
      lcd.print("BRENO CORREIA LOCIKS");
      lcd.setCursor(16, 1);
      lcd.print("BRUNO MARTINS SGAI");

      Serial.println("BRENO CORREIA LOCIKS");
      Serial.println("BRUNO MARTINS SGAI");
      Serial.println("");

      LCD = 2;
    }
    else if (LCD == 3) {
      lcd.print("Tmp. : ");
      lcd.print(t);
      lcd.print(" ");
      lcd.print((char)223);
      lcd.print("C");
      lcd.setCursor(0, 1);
      lcd.print("Umd. : ");
      lcd.print(h);
      lcd.print((char)37);

      Serial.print("Temperatura = ");
      Serial.print(t);
      Serial.print(" ");
      Serial.print("C | ");
      Serial.print("Umidade = ");
      Serial.print(h);
      Serial.println("% ");
      Serial.println("");

      LCD = 0;
    }
  }

  if (LCD == 2 && (millisAtual - millisAnteriorScroll) >= 500) {
    millisAnteriorScroll = millisAtual;

    lcd.scrollDisplayLeft();
    scroll++;

    if (scroll == 36) {
      LCD = 3;
      scroll = 0;
      lcd.clear();
    }
  }
}