#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include<WiFiClient.h>
#include<BlynkSimpleEsp32.h>
LiquidCrystal_I2C lcd (0x27,16,2);
int ledred = 12;
int ledyellow = 14;
int ledgreen = 27;
int trig = 25;
int echo = 26;

float duration;
float distance;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(ledred , OUTPUT);
  pinMode(ledyellow, OUTPUT);
  pinMode(ledgreen, OUTPUT);
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);  
  lcd.init();
  lcd.backlight();
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);	
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance= (duration*0.0344)/2;
  delay(10); // this speeds up the simulation
}