Since 2020

// Since 2020 //                                                                                                                                                                             
//This project will prevent crowd in places like shops, temples etc//


#include <LiquidCrystal.h>                                                                                                                                                          
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

int ir=9;
int sensor;

//water pump
int motor= 10; 

//temprature
int value;
float celsius;   
const int lm= A1;                                                                                                                                           

//counter senosr
int trig=7;
int echo=8;
long duration;
int distance;

int count = 0;

void setup()
{
Serial.begin(9600);

pinMode(ir,INPUT);
pinMode(motor,OUTPUT);
pinMode(13,OUTPUT);  //inbuild led of arduino\\
pinMode(trig,OUTPUT);
  pinMode(echo,INPUT);                                                                   
Serial.println("Welcome!");   

lcd.begin(16,2);
lcd.setCursor(0,0);
lcd.print("Welcome!");

}

void loop()
{

//count
digitalWrite(trig,LOW);
delay(2);
digitalWrite(trig,HIGH);
delay(10);
digitalWrite(trig,LOW);

sensor = digitalRead(ir);
if(sensor == 0)
 {
 value = analogRead(lm);
 celsius = (value / 2.048); // Getting the temperature from the sensor

 lcd.clear();
 lcd.noCursor();
 lcd.setCursor(0,0);
 lcd.print("Hello!");
 Serial.println("नमस्कार");
 
 digitalWrite(motor,1);
 delay(1000);
 digitalWrite(motor,0);
 delay(1000);  
 
 if(celsius <= 40 && celsius >= 27)
{ 
 lcd.clear();
 lcd.noCursor();
 lcd.setCursor(0,1);
 lcd.print(celsius);
 Serial.println(celsius);
 Serial.println("you are safe");
 digitalWrite(13,LOW);
 lcd.setCursor(0,0);
 lcd.print("You are Safe!");
 delay(500);
}
else
{
 digitalWrite(motor,0);
 delay(1000);
 Serial.println(celsius);
 lcd.clear();
 lcd.noCursor();
 lcd.setCursor(0,1);
 lcd.print(celsius);
 lcd.setCursor(0,0);
 lcd.print("Stay Home");
 digitalWrite(13,HIGH);
 delay(2000);
 digitalWrite(13,LOW);
}

 
 Serial.println("घर पर रहिए");

 
}

//counting
if(duration=pulseIn(echo,HIGH))
{
distance=(duration*0.034/2);
if(distance<=40)
 {
 if(count<= 3 )  //can be set upto user limit
 {
    count++; 
    Serial.println(count);
    lcd.clear();
    lcd.noCursor();
    lcd.setCursor(0,0);
    lcd.print(count);
    delay(2000);
    
 }
  else if(count >= 2)
 {
 digitalWrite(13,HIGH);
 delay(1000);
 lcd.clear();
 lcd.noCursor();
 lcd.setCursor(0,0);
 lcd.print("Please Wait!");
 delay(2000);
  
 } 
 }
}}