#define BLYNK_PRINT Serial

//fix
#define BLYNK_TEMPLATE_ID "TMPL6FvRvu4SC"
#define BLYNK_TEMPLATE_NAME "hoanho"
#define BLYNK_AUTH_TOKEN "l2ml8lzA8O5IjfERKiZ9i-XEF_A5-YYG"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <DHT.h>

char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

#define DHTPIN 14
#define DHTTYPE DHT22
#define TRIGpin 19
#define ECHOpin 18
#define SOUND_SPEED 0.343
DHT dht(DHTPIN, DHTTYPE);
int red = 33;
int button;

void setup() {

  Serial.begin(115200);
  pinMode(TRIGpin, OUTPUT);
  pinMode(ECHOpin, INPUT);
  pinMode(red, OUTPUT);
  Blynk.begin(auth, ssid, pass);
  dht.begin();
}

BLYNK_WRITE (V1)
{
  button = param.asInt();
  if (button ==1) {
    digitalWrite(red, HIGH);
  }
  else {
    digitalWrite(red, LOW);
  }
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(1000); // this speeds up the simulation
  float h = dht.readHumidity();
  float t = dht.readTemperature();

  digitalWrite(TRIGpin, LOW);    
  delayMicroseconds(2);
  digitalWrite(TRIGpin, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIGpin, LOW);

  long duration = pulseIn(ECHOpin, HIGH);
  float distance = (duration/2) * SOUND_SPEED;

  Blynk.virtualWrite(V3, h);
  Blynk.virtualWrite(V2, t);
  Blynk.virtualWrite(V4, distance);
  Blynk.run();
}