#include <DHT.h>
#include <LiquidCrystal_I2C.h>

#define pin_trig  14
#define pin_echo 13
#define pin_dht 7
#define pin_ldr 4
#define DHTTYPE DHT22
#define rele 6


DHT dht(pin_dht, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16,2);

void setup() {

  pinMode(pin_trig, OUTPUT);
  pinMode(pin_echo, INPUT);
  pinMode(rele, OUTPUT);

  Serial.begin(115200);
  lcd.init();
  lcd.backlight();
  lcd.clear();
  lcd.setCursor(6, 0);
  lcd.print("IFAM");
  lcd.setCursor(2, 1);
  lcd.print("S. embarcados");
  delay(2000);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Aluno");
  lcd.setCursor(0, 1);
  lcd.print("Andrew");
  delay(2000);
}

long UltrassonicSensor(){
 //essa funcao armazena o tempo
  digitalWrite(pin_trig, 0);
  delayMicroseconds(2);
  digitalWrite(pin_trig, 1);
  delayMicroseconds(10);
  digitalWrite(pin_trig, 0);
  
  return pulseIn(pin_echo, 1);

}

void loop() {
  
 int distancia_cm = 0.01723 * UltrassonicSensor();
 lcd.clear();
 lcd.setCursor(0,0);
 lcd.print("Distancia:");
 lcd.setCursor(0,1);
 lcd.print(distancia_cm);
 delay(2000);

 int valor_ldr = analogRead(pin_ldr);
 int luminosidade = map(valor_ldr, 0, 4095, 100, 0);
 lcd.clear();
 lcd.setCursor(0,0);
 lcd.print("Luminosidade:");
 lcd.setCursor(0,1);
 lcd.print(luminosidade);
 delay(2000);

 float t = dht.readTemperature();
 float h = dht.readHumidity();

 lcd.clear();
 lcd.setCursor(0,0);
 lcd.print("Temperatura:");
 lcd.setCursor(0,1);
 lcd.print(t);
 delay(2000);

 lcd.clear();
 lcd.setCursor(0,0);
 lcd.print("Humidade:");
 lcd.setCursor(0,1);
 lcd.print(h);
 delay(2000);

 if (luminosidade >= 70 && (t >= 30 || h <= 75)){
  digitalWrite(rele, 1);
 } else{
  digitalWrite(rele, 0);
 }
}