#define BLYNK_PRINT Serial




/* Fill in information from Blynk Device Info here */
#define BLYNK_TEMPLATE_ID "TMPL6cZQPd1d3"
#define BLYNK_TEMPLATE_NAME "lab7"
#define BLYNK_AUTH_TOKEN "cu5ra-5u3RlyoxCLi2_2ZmPa8Z2By40O"

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <ESP32Servo.h>


BlynkTimer timer;
Servo servo;


char ssid[] = "Wokwi-GUEST";
char pass[] = "";
const int LED = 12, SERVO = 14, TRIG = 27, ECHO = 35; // Update these pins
int last_speed = 0, last_distance = 0, is_break = 0;




BLYNK_CONNECTED()
{
  Blynk.syncAll();
}
BLYNK_WRITE(V0)
{
  int value = param.asInt();
  is_break = value;


  if (value) {
    servo.write(0);
    Blynk.virtualWrite(V2, 0);
    Blynk.syncVirtual(V2);
    Serial.println("Break!");
  } else {
    servo.write(last_speed);
    Blynk.virtualWrite(V2, last_speed);
    Blynk.syncVirtual(V2);
    Serial.println("Released!");
  }


  digitalWrite(LED, value);
}
BLYNK_WRITE(V2)
{
  int value = param.asInt();
  Serial.print("Speed: ");
  Serial.println(value);


  last_speed = value;


  servo.write(value);
 
  if (is_break && last_speed > 0) {
    Blynk.syncVirtual(V0);
  }
}


void scanObject()
{
  digitalWrite(TRIG, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG, LOW);


  int duration = pulseIn(ECHO, HIGH);
  float cm = duration / 58.0;


  Serial.print("Distance in CM: ");
  Serial.println(cm);
  last_distance = cm;
  Blynk.virtualWrite(V1, cm);


  if (cm < 100 && !is_break) {
    Blynk.virtualWrite(V0, 1);
    Blynk.syncVirtual(V0);
  }
}




void setup()
{
  Serial.begin(115200);
  pinMode(LED, OUTPUT);
  pinMode(TRIG, OUTPUT);
  pinMode(ECHO, INPUT);
  servo.attach(SERVO);
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass, "blynk.cloud", 80);
  timer.setInterval(200L, scanObject);
}




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