#include <LiquidCrystal_I2C.h>
#include <ESP32Servo.h>

#define SOUND_SPEED 0.034
int lcdColumns = 16;
int lcdRows = 2;
LiquidCrystal_I2C lcd(0x27, lcdColumns, lcdRows);

int distance;
int distance1;
int A = 0;
int pos = 0;
const int trigPin = 5;
const int echoPin = 18;
const int trigPin1 = 26;
const int echoPin1 = 25;
const int led = 12;
const int led1 = 14;
long duration;
long duration1;
float distanceCm;
float distanceCm1;

Servo myservo;
void setup() {
  myservo.attach(4);
  Serial.begin(115200);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(trigPin1, OUTPUT);
  pinMode(echoPin1, INPUT);

    lcd.init();
    lcd.backlight();
    lcd.setCursor(0, 0);
    lcd.print("Wel-come");
    lcd.setCursor(0, 1);
    lcd.print("Calculating:");
    myservo.write(pos);
   delay (4000);
   lcd.clear();

}

void loop() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = duration * SOUND_SPEED / 2;
  /*distance = distanceCm / 4;*/
  Serial.print("distance(%): ");
  Serial.println(distance);


  delay(3000);
  
  digitalWrite(trigPin1, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin1, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin1, LOW);
  duration1 = pulseIn(echoPin1, HIGH);
  distance1 = duration1 * SOUND_SPEED / 2;
  /* distance1 = distanceCm1 / 4;*/
  Serial.print("distance(%): ");
  Serial.println(distance1);

  lcd.setCursor(0, 0);
  lcd.print("distance:");
  lcd.setCursor(11, 0);
  lcd.print(distance);
  lcd.setCursor(14, 0);
  lcd.print("%");

  if(distance<100){
    if(distance1<100){
      Serial.println("Incoming Person");
      lcd.setCursor(0, 1);
      lcd.println("Incoming Person");
      A = A++;
    }
  }

  if(distance1<100){
    if(distance<100){
      Serial.println("Outgoing Person");
      lcd.setCursor(0, 1);
      lcd.println("Outgoing Person");
      A = A--;
    }
  }
   
   Serial.println(A);

   if (A=0){
    pos=pos+90;
    Serial.println(pos);
    lcd.setCursor(0, 1);
    myservo.write(pos);
    delay(15);
    pos = 0;
  }

  delay(1000);



   /*if(distance1<10){
    digitalWrite(led1, HIGH);
    delayMicroseconds(2);
  }

  if (distance < 10) {
    A = 0;
  }

  if (A == 0 ) {
    digitalWrite(led, HIGH);
    delayMicroseconds(2);
    Serial.println("Motion Detected");
    lcd.setCursor(0, 1);
    lcd.print("Motion Detected");
  }

  if (distance > 95) {
    digitalWrite(led, LOW);
    delayMicroseconds(2);
    Serial.println("Unchanged .....");
    lcd.setCursor(0, 1);
    lcd.print("Unchanged .....");
    A = 1;
  }*/
   
}