Smart_city_parking_code.ino

#include<Servo.h>
#include <LiquidCrystal.h>
const int rs = 12, en = 11, d4 = 8, d5 = 7, d6 = 6, d7 = 5;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
Servo myservo1;
int ir_s1=2;
int ir_s2=4;

int ir_p_1= 13;
int ir_p_2= 9;
int ir_p_3= 10;

int total=0;
int slot=3;
int flag1=0;
int flag2=0;

int s1=0,s2=0,s3=0;

void setup() {
  Serial.begin(9600);
  pinMode(ir_s1,INPUT);
  pinMode(ir_s2,INPUT);

  pinMode(ir_p_1,INPUT);
  pinMode(ir_p_2,INPUT);
  pinMode(ir_p_3,INPUT);

  myservo1.attach(3);
  myservo1.write(180);

  lcd.begin(16, 2);
  lcd.print("Smart Parking");
  delay(5000);
  lcd.clear();
}

void loop() {
  
  read_sensor();

  lcd.setCursor(0,0);
  lcd.print("Have Slots:");
  lcd.print(slot);

  lcd.setCursor(0,1);
  if(s1==1)
  {
    lcd.print("s1:F");
  }
  else
  {
    lcd.print("s1:E");
  }

  lcd.setCursor(5,1);
  if(s2==1)
  {
    lcd.print("s2:F");
  }
  else
  {
    lcd.print("s2:E");
  }
  
  lcd.setCursor(10,1);
  if(s3==1)
  {
    lcd.print("s3:F");
  }
  else
  {
    lcd.print("s3:E");
  } 
  

  if(digitalRead(ir_s1)==0 && flag1==0)
  {
    
    if(slot>0)
    {
      flag1=1;
      if(flag2==0)
      {
        myservo1.write(90);
        slot=slot-1;
        
      }
    }  
      else
      {
        lcd.clear();
        lcd.setCursor(0,0);
        lcd.print("Parking ");
        lcd.setCursor(0,1);
        lcd.print("Full ");
        //delay(5000);
        delay(1500);
      }
    }
  

  if(digitalRead(ir_s2)==0 && flag2==0)
  {
    flag2=1;
    if(flag1==0)
    {
      myservo1.write(90);
      slot=slot+1;
    }
  }

  if(flag1==1 &&flag2==1)
  {
    delay(1000);
    myservo1.write(180);
    flag1=0;
    flag2=0;
  }

  
  delay(10);
}

void read_sensor()
{
  s1=0,s2=0,s3=0;
  if(digitalRead(ir_p_1)==0)
  {
    s1=1;
  }
  if(digitalRead(ir_p_2)==0)
  {
    s2=1;
  }
  if(digitalRead(ir_p_3)==0)
  {
    s3=1;
  }
}