#define BLYNK_TEMPLATE_ID "TMPL39LbZPa6i"
#define BLYNK_TEMPLATE_NAME "LCD with Ultrasonic senssorss"
#define BLYNK_AUTH_TOKEN "7hif_FJ58acq5MWuGW_a6gKlYpHHODIq"
#define BLYNK_PRINT Serial

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

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C LCD(0x27,16,2);

#include <ESP32Servo.h>
Servo myservo;

#define RLED 0
#define GLED 5

const int trig_Pin=2;
const int echo_Pin=4;

long duration;
int distance;

void setup()
{
  Serial.begin(9600);
  Blynk.begin(auth,ssid,pass);
  pinMode(trig_Pin,OUTPUT);
  pinMode(echo_Pin,INPUT);
  
  myservo.attach(15);
  pinMode(RLED,OUTPUT);
  pinMode(GLED,OUTPUT);
  
  LCD.init();
  LCD.backlight();
  LCD.setCursor(0,0);
  LCD.print("ACCIDENT DETECTION");
  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);
 

  if(distance<40)
  {
    myservo.write(90);
    digitalWrite(RLED,HIGH);
    digitalWrite(GLED,LOW);
    Serial.println("breaks applied");
    LCD.setCursor(0,1);
    LCD.print("S:");
    LCD.setCursor(2,1);
    LCD.print("alert break");
    Blynk.virtualWrite(V1,"break applied");
    Blynk.virtualWrite(V2,"RED LIGHT ON");
  }
  else
  {
    myservo.write(0);
    digitalWrite(GLED,HIGH);
    Blynk.virtualWrite(GLED,HIGH);
    digitalWrite(RLED,LOW);
    Blynk.virtualWrite(RLED,LOW);
    Serial.println("safe");
    LCD.setCursor(0,1);
    LCD.print("S:");
    LCD.setCursor(2,1);
    LCD.print("safe condition");
    Blynk.virtualWrite(V1,"safe condition");
    Blynk.virtualWrite(V2,"GREEN LIGHT ON");
  }

   LCD.setCursor(0,0);
   LCD.print("                ");
   LCD.setCursor(0,0);
   LCD.print("ULTRA:");
   LCD.setCursor(7,0);
   LCD.print(distance);

   }