#include <DHTesp.h>
#include <LiquidCrystal_I2C.h>
#include <Wire.h>

int triggerPin = 18;
int echoPin = 19;
int dhtPin = 1;
long cm = 0;
long t1 = 0;
long t2 = 0;

long leeDistancia(int triggerPin, int echoPin)
{
 pinMode(triggerPin, OUTPUT); // Borra el trigger
 digitalWrite(triggerPin, LOW);
 delayMicroseconds(2);
 digitalWrite(triggerPin, HIGH); // activa el trigger durante 10 microsegundos
 delayMicroseconds(10);
 digitalWrite(triggerPin, LOW);
 pinMode(echoPin, INPUT);
 return pulseIn(echoPin, HIGH); // lee la anchura del pulso en microsegundos
}

DHTesp dht;
LiquidCrystal_I2C lcd(0x27,20,4);

void setup() {
  Serial.begin(115200);
  dht.setup(dhtPin, DHTesp::DHT22);
  Serial.println("DHT initiated");
  Wire.begin();
  lcd.init(); 
  lcd.backlight();
  lcd.setCursor(0,0); 
  lcd.print("Dist: ");
  lcd.setCursor(0,1); 
  lcd.print("Temp: ");
  lcd.setCursor(0,2);
  lcd.print("Hum: ");
  }

void loop() {
  if (millis()-t1 > 2000) {
    TempAndHumidity newValues = dht.getTempAndHumidity();
    lcd.setCursor(7,1);
    lcd.print(String(newValues.temperature));
    lcd.print(" C");
    lcd.print("  ");
    lcd.setCursor(6,2);
    lcd.print(String(newValues.humidity));
    lcd.print(" %");
    lcd.print("  ");
    t1 += 2000;
  }
  if (millis()-t2 > 1000) {
    lcd.setCursor(7,0);
    lcd.print(leeDistancia(triggerPin,echoPin)*0.017);
    lcd.print(" cm");
    lcd.print("  ");
    t2 += 1000;
  }
}