#include <Wire.h>
#include "DFRobot_SHT20.h"
#include <LiquidCrystal.h>
#include <avr/wdt.h>

DFRobot_SHT20 sht20;
LiquidCrystal lcd(10, 8, 2, 3, 4, 5);

byte tempchar1[8] = {B00000, B00001, B00010, B00100, B00100, B00100, B00100, B00111};
byte tempchar2[8] = {B00111, B00111, B00111, B01111, B11111, B11111, B01111, B00011};
byte tempchar3[8] = {B00000, B10000, B01011, B00100, B00111, B00100, B00111, B11100};
byte tempchar4[8] = {B11111, B11100, B11100, B11110, B11111, B11111, B11110, B11000};

byte humchar5[8] = {B00000, B00001, B00011, B00011, B00111, B01111, B01111, B11111};
byte humchar6[8] = {B11111, B11111, B11111, B01111, B00011, B00000, B00000, B00000};
byte humchar7[8] = {B00000, B10000, B11000, B11000, B11100, B11110, B11110, B11111};
byte humchar8[8] = {B11111, B11111, B11111, B11110, B11100, B00000, B00000, B00000};

const int RELAY_PIN_1 = 14;
const int RELAY_PIN_2 = 15;
const int buzzer = 16;

volatile int ASAGI = 12;

void kesme (void) {

  cli();

  PCICR = 0;
  PCMSK0 = 0;

  PCICR |= (1 << PCIE0);
  PCMSK0 |= (1 << PCINT4);

  sei();
}

ISR(PCINT0_vect) {

  delay(50);
  if (!digitalRead(ASAGI) == 1) {

    delay(25);
    while (!digitalRead(ASAGI) == 1);
    PORTB ^= (1 << 5);
  }
}

void setup() {

  kesme();

  sht20.initSHT20();
  lcd.begin(16, 2);

  pinMode(RELAY_PIN_1, OUTPUT);
  pinMode(RELAY_PIN_2, OUTPUT);
  pinMode(buzzer, OUTPUT);
  pinMode(13, OUTPUT);

  pinMode(ASAGI, INPUT);

  wdt_enable(WDTO_4S);
}

void loop() {

  float humd = sht20.readHumidity();
  float temp = sht20.readTemperature();

  lcd.home();

  lcd.createChar(1, tempchar1);
  lcd.createChar(2, tempchar2);
  lcd.createChar(3, tempchar3);
  lcd.createChar(4, tempchar4);
  lcd.setCursor(0, 0);
  lcd.write(1);
  lcd.setCursor(0, 1);
  lcd.write(2);
  lcd.setCursor(1, 0);
  lcd.write(3);
  lcd.setCursor(1, 1);
  lcd.write(4);

  lcd.setCursor(3, 0);
  lcd.print("SIC");

  lcd.setCursor(3, 1);
  lcd.print(temp, 1);
  lcd.print((char) 223);

  lcd.createChar(5, humchar5);
  lcd.createChar(6, humchar6);
  lcd.createChar(7, humchar7);
  lcd.createChar(8, humchar8);
  lcd.setCursor(9, 0);
  lcd.write(5);
  lcd.setCursor(9, 1);
  lcd.write(6);
  lcd.setCursor(10, 0);
  lcd.write(7);
  lcd.setCursor(10, 1);
  lcd.write(8);

  lcd.setCursor(12, 0);
  lcd.print("NEM");

  lcd.setCursor(12, 1);
  lcd.print(humd, 0);
  lcd.print("%");

  if (temp < 37.7) {

    digitalWrite(RELAY_PIN_1, HIGH);
  }

  else {

    digitalWrite(RELAY_PIN_1, LOW);
  }

  if (humd < 55.0) {

    digitalWrite(RELAY_PIN_2, HIGH);
  }

  else {

    digitalWrite(RELAY_PIN_2, LOW);
  }

  if (humd > 80) {

    digitalWrite(buzzer, HIGH);
  }

  else {

    digitalWrite(buzzer, LOW);
  }

  delay(250);

  wdt_reset();
}