#define BLYNK_TEMPLATE_ID "TMPL3wF-bTPYu"
#define BLYNK_TEMPLATE_NAME "Homeautomation"
#define BLYNK_AUTH_TOKEN "ydI06i65QMh8B_5Ay6_we-ak7rJTpvoe"
#define BLYNK PRINT Serial
#define SERVO_ESP32 


char auth[]= BLYNK_AUTH_TOKEN ;
char ssid[]="Wokwi-GUEST";//mobile hotspot name
char pass[]="";//hotspot password

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

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

const int trig_pin=2;
const int echo_pin=4;

long duration;
int distance;

void setup()
{
  pinMode(trig_pin,OUTPUT);
  pinMode(echo_pin,INPUT);
  myservo.attach(15);
  LCD.init();
  LCD.backlight();
  LCD.setCursor(0, 0);
  LCD.print("ACCIDENT DETECTION");
  delay(5000);
  LCD.setCursor(0, 1);
  LCD.print("ROBOTIC AND AUTOMATION");
  delay(5000);
  Serial.begin(9600);
  Blynk.begin(auth,ssid,pass);
  LCD.clear();


}
void loop()
{
  digitalWrite(trig_pin,LOW);
  delayMicroseconds(2);
  digitalWrite(trig_pin,HIGH);
  delayMicroseconds(10);
  digitalWrite(trig_pin,LOW);

  duration=pulseIn(echo_pin,HIGH);
  distance=duration*0.034/2;
  Serial.println(distance);
  Blynk.virtualWrite(V0,"distance");
  
  LCD.setCursor(0,0);
  LCD.print("ULTRA:");
  LCD.setCursor(7,0);
  LCD.print(distance);
  LCD.setCursor(0, 1);
  LCD.print("ST:");
  myservo.write(90;
  delay(1000);
  myservo.write(0);
  delay(1000);
  if (distance < 100) (distance<40){
    LCD.setCursor(3, 1);
    LCD.print("BRAKES APPLIED");
    Blynk.virtualWrite(V1,"BRAKES APPLIED");
    delay(1000);
    myservo.write(90);
    } else {
    LCD.setCursor(3, 1);
    LCD.print("SAFE");
    Blynk.virtualWrite(V1,"SAFE");
    delay(1000);
    myservo.write(0);
  }
    LCD.clear();
}