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

#define pinDHT 8
#define model DHT22

DHT dht(pinDHT,model);
float temperatura;

LiquidCrystal lcd(12,11,10,5,4,3,2);
long tempoLcd;

#define pinTrig 6
#define pinEcho 7
long tempoHC;
float distancia;

long inicio;
long b;


void setup() {
  // put your setup code here, to run once:
  inicio = millis();
  pinMode(13, OUTPUT);//blue
  pinMode(9, OUTPUT);//red
  pinMode(7, OUTPUT);//green
  pinMode(14, OUTPUT);//botaovermelho
  pinMode(15, OUTPUT);//botaoazul
  lcd.begin(16,2);
  lcd.print("Olá Estranho!!!");
  tempoLcd = millis();
  
  dht.begin();

  //LED
  pinMode(13, OUTPUT);//blue
  pinMode(9, OUTPUT);//red
  pinMode(7, OUTPUT);//green
  pinMode(14, OUTPUT);//botaovermelho
  pinMode(15, OUTPUT);//botaoazul
  pinMode(pinTrig, OUTPUT);
  pinMode(pinEcho, INPUT);


}

void loop() {
  // put your main code here, to run repeatedly:
  //HC-SR04
  digitalWrite(pinTrig,LOW);
  delayMicroseconds(2);
  digitalWrite(pinTrig, HIGH);
  delayMicroseconds(10);
  digitalWrite(pinTrig,LOW);

  //LED verde
  digitalWrite(7, HIGH);
  digitalWrite(9, LOW);
  digitalWrite(13, LOW);
  temperatura = (18 ≤  temp ≤  30);//temp ideal

  //LED vermelho
  digitalWrite(7, LOW);
  digitalWrite(9, HIGH);
  digitalWrite(13, LOW);
  temperatura = (temp < 18);//muito frio

  //LED azul
  digitalWrite(7, LOW);
  digitalWrite(9, LOW);
  digitalWrite(13, HIGH);
  temperatura = (temp > 30);// muito quente

  //DHT 22 - Temperatura
  temperatura = dht.readTemperature();

  if(millis()- tempoLcd > 3000){
    lcd.clear();
    lcd.print("Temp: ");
    lcd.print(temperatura);
    lcd.setCursor(0,1);
    tempoLcd = millis();
  }

  if(distancia < 20 && temperatura >30){
    digitalWrite(13, HIGH);

    else{
      noTone(9);
    }
  }
  else{
    digitalWrite(13,LOW);
    noTone(9);
  }
}