#define BLYNK_TEMPLATE_ID "TMPL3QmX0Lhwg"
#define BLYNK_TEMPLATE_NAME "project1"
#define BLYNK_AUTH_TOKEN "seZEu5jyUUULVq01ED3jAKWyhABUpwie"


#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#define TRIG_PIN 18 // ESP32 pin GIOP23 connected to Ultrasonic Sensor's TRIG pin
#define ECHO_PIN 5 // ESP32 pin GIOP22 connected to Ultrasonic Sensor's ECHO pin

char auth[] = "seZEu5jyUUULVq01ED3jAKWyhABUpwie";
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

float duration_us, distance_cm;
BlynkTimer timer;

void sendSensorData()
{
// generate 10-microsecond pulse to TRIG pin
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
 
  // measure duration of pulse from ECHO pin
  duration_us = pulseIn(ECHO_PIN, HIGH);
  
  // calculate the distance
  distance_cm = 0.017 * duration_us;
 
  // ligt up led if distance under limit
  //if (distance_cm < 30) {digitalWrite(LED, HIGH);
  //}else{digitalWrite(LED, LOW);
  //}
 
  // print the value to Serial Monitor
  Serial.print("distanceA: ");
  Serial.print(distance_cm);
  Serial.println(" cm      ");
  Blynk.virtualWrite(V0, distance_cm);  // Virtual Pin V1 for temperature
 // Blynk.virtualWrite(V1, humidity);     // Virtual Pin V2 for humidity
}

void setup()
{
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass);
  // configure the trigger pin to output mode
  pinMode(TRIG_PIN, OUTPUT);
  // configure the echo pin to input mode
  pinMode(ECHO_PIN, INPUT);

  timer.setInterval(1000L, sendSensorData);  // Send sensor data every 5 seconds
}

void loop()
{
  Blynk.run();
  timer.run();
}