#include <LiquidCrystal.h>
#include <DHT.h>
#include <string.h>
#include <Servo.h>

#define DHT_PIN 3
#define DHT_TYPE DHT22
#define green_led_pin 13
#define red_led_pin 5

#define BUZZER_PIN 4

#define SERVO_PIN 6

LiquidCrystal lcd(12, 11, 10, 9, 8, 7);
DHT dht(DHT_PIN, DHT_TYPE);
volatile int button = 0;

Servo servo;

void setup() {
  lcd.begin(16,2); 
  lcd.print("Inicializando leitura");
  for(int i = 0; i < 5; i++) {
    lcd.scrollDisplayLeft();
    delay(200);
  }
  for(int i = 5; i < 12; i++){
    lcd.setCursor(i, 1);
    lcd.write(".");
    delay(200);
  }
  lcd.clear();

  dht.begin();
  servo.attach(SERVO_PIN);
  pinMode(green_led_pin, OUTPUT);
  pinMode(red_led_pin, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);



  Serial.begin(9600);
  pinMode(DHT_PIN, INPUT);
  attachInterrupt(digitalPinToInterrupt(2), escala, RISING);
}

void escala() {
  button = !button;
}

void loop() {
  lcd.clear();
  float celsius = dht.readTemperature();
  float fahrenheit = (celsius * 9/5)+ 32;

  Serial.println(digitalRead(2));

  String temperatura = String(celsius) + "C";
  lcd.setCursor(0, 0);
  lcd.print("Temperatura: ");

  lcd.setCursor(1, 1);
  if (button) {
    temperatura = String(fahrenheit) + "F";
  }
  
  lcd.print(temperatura);

  if(celsius > 40) {
    digitalWrite(red_led_pin, HIGH);
    digitalWrite(green_led_pin, LOW);
    servo.write(180);
    digitalWrite(BUZZER_PIN, HIGH);
    delay(200);
    digitalWrite(BUZZER_PIN, LOW);
    
  } else {
    digitalWrite(red_led_pin, LOW);
    digitalWrite(green_led_pin, HIGH);
    digitalWrite(BUZZER_PIN, LOW);
    servo.write(0);
  }

  delay(100);

}