#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);

#include <HCSR04.h>
byte triggerPin = 12;
byte echoPin = 11;

#include <DHT.h>
#define DHTPIN 2
#define DHTTYPE DHT22
DHT dht(DHTPIN,DHTTYPE);

int mov;
const int PIR_PIN = 7;
String mov_est;

int time = 1000;
int timeSetUp = 1500;

void setup() {
  pinMode (PIR_PIN, INPUT);
  dht.begin();
  HCSR04.begin(triggerPin, echoPin);

  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.println("Bienvenidos ");
  lcd.setCursor(5, 1);
  lcd.print("a la USAT");
  delay(timeSetUp);
  lcd.clear();
}

void loop() {
 // SENSORES  
  float t = dht.readTemperature(); // DHT temperatura 
  float h = dht.readHumidity(); // DHT humedad
  mov = digitalRead(7); // PIR
  if (mov == HIGH) {    
    mov_est = "Si";
  } else {
    mov_est = "No";
  }  
  double* distances = HCSR04.measureDistanceCm(); // HCSR04
   
  // LCD_I2C
  mostrarInfoLCD("Temperatura",t,"C",0); // DHT temperatura
  mostrarInfoLCD("Humedad",h,"%",3); // DHT humedad
  mostrarInfoLCD("Movimiento",mov_est,"detectado",1); // PIR
  mostrarInfoLCD("Distancia",distances[0],"cm",5); // HCSR04
}

void mostrarInfoLCD (String description, double value, String unit, int row) {
  mostrarInfoLCD(description,String(value, 2),unit,row);
}

void mostrarInfoLCD (String description, String value, String unit, int row) { 
  lcd.setCursor(0,0);
  lcd.print(description);
  lcd.print(":");
  lcd.setCursor(row,1);
  lcd.print(value);
  lcd.print(" ");
  lcd.print(unit);
  delay(time);
  lcd.clear();
}