Bidirectional Visitor Counter Project with Arduino UNO

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Code

#include<LiquidCrystal.h>
LiquidCrystal lcd(2,3,4,5,6,7);

#define in 8
#define out 9
#define fan 10

int count=0;

void setup()
{
  lcd.begin(16,2);
  lcd.print("Visitor Counter");
  delay(2000);
  pinMode(in, INPUT);
  pinMode(out, INPUT);
  pinMode(fan, OUTPUT);
  lcd.clear();
  lcd.print("Person In Room:");
  lcd.setCursor(0,1);
  lcd.print(count);
}

void loop()
{  

  int in_value = digitalRead(in);
  int out_value = digitalRead(out);

  if(in_value == LOW)
  {
    count++;
    lcd.clear();
    lcd.print("Person In Room:");
    lcd.setCursor(0,1);
    lcd.print(count);
    delay(1000);
  }

  if(out_value == LOW)
  {
    count--;
    lcd.clear();
    lcd.print("Person In Room:");
    lcd.setCursor(0,1);
    lcd.print(count);
    delay(1000);
  }


  if(count==0)
  {
    lcd.clear();
    digitalWrite(fan, LOW);
    lcd.clear();
    lcd.print("Nobody In Room");
    lcd.setCursor(0,1);
    lcd.print("Fan is Off");
    delay(200);
  }

  else
  {
    digitalWrite(fan, HIGH);
  }
}

  

Comments

  1. Tanay10 May 2019 at 23:25

    Count is fluctuating between 1 and 0 initially.

    ReplyDelete
    Replies
    1. Unknown9 January 2021 at 01:59

      yes, i also faced the same pblm

      Delete
    2. Unknown9 January 2021 at 02:50


      #include
      LiquidCrystal lcd(12,11,5,4,3,2);

      #define in 8
      #define out 9
      #define relay 10

      int count=0;

      void IN()
      {
      count++;
      lcd.clear();
      lcd.print("Person In Room:");
      lcd.setCursor(0,1);
      lcd.print(count);
      delay(1000);
      }

      void OUT()
      {
      count--;
      lcd.clear();
      lcd.print("Person In Room:");
      lcd.setCursor(0,1);
      lcd.print(count);
      delay(1000);
      }

      void setup()
      {
      lcd.begin(16,2);
      lcd.print("Visitor Counter");
      delay(2000);
      pinMode(in, INPUT);
      pinMode(out, INPUT);
      pinMode(relay, OUTPUT);
      lcd.clear();
      lcd.print("Person In Room:");
      lcd.setCursor(0,1);
      lcd.print(count);
      }

      void loop()
      {

      if(digitalRead(in)){
      IN();}
      if(digitalRead(out)){
      OUT();}

      if(count<=0)
      {
      lcd.clear();
      digitalWrite(relay, LOW);
      lcd.clear();
      lcd.print("Nobody In Room");
      lcd.setCursor(0,1);
      lcd.print("Light Is Off");
      delay(200);
      }

      else
      digitalWrite(relay, HIGH);

      }

      Delete
  2. Pratik3 August 2019 at 06:47

    Hey!
    What is the total approximate cost of this project
    I'm thinking of making it for my college

    ReplyDelete
  3. Unknown21 November 2019 at 23:49

    Which resistor is used

    ReplyDelete
  4. Unknown31 December 2019 at 07:11

    Good job bro

    ReplyDelete
  5. Unknown31 May 2020 at 02:55

    Good Job, thanks for sharing code

    ReplyDelete
    Replies
    1. Unknown9 January 2021 at 02:51

      this is correct code




      #include
      LiquidCrystal lcd(12,11,5,4,3,2);

      #define in 8
      #define out 9
      #define relay 10

      int count=0;

      void IN()
      {
      count++;
      lcd.clear();
      lcd.print("Person In Room:");
      lcd.setCursor(0,1);
      lcd.print(count);
      delay(1000);
      }

      void OUT()
      {
      count--;
      lcd.clear();
      lcd.print("Person In Room:");
      lcd.setCursor(0,1);
      lcd.print(count);
      delay(1000);
      }

      void setup()
      {
      lcd.begin(16,2);
      lcd.print("Visitor Counter");
      delay(2000);
      pinMode(in, INPUT);
      pinMode(out, INPUT);
      pinMode(relay, OUTPUT);
      lcd.clear();
      lcd.print("Person In Room:");
      lcd.setCursor(0,1);
      lcd.print(count);
      }

      void loop()
      {

      if(digitalRead(in)){
      IN();}
      if(digitalRead(out)){
      OUT();}

      if(count<=0)
      {
      lcd.clear();
      digitalWrite(relay, LOW);
      lcd.clear();
      lcd.print("Nobody In Room");
      lcd.setCursor(0,1);
      lcd.print("Light Is Off");
      delay(200);
      }

      else
      digitalWrite(relay, HIGH);

      }

      Delete
  6. Unknown9 January 2021 at 02:51


    #include
    LiquidCrystal lcd(12,11,5,4,3,2);

    #define in 8
    #define out 9
    #define relay 10

    int count=0;

    void IN()
    {
    count++;
    lcd.clear();
    lcd.print("Person In Room:");
    lcd.setCursor(0,1);
    lcd.print(count);
    delay(1000);
    }

    void OUT()
    {
    count--;
    lcd.clear();
    lcd.print("Person In Room:");
    lcd.setCursor(0,1);
    lcd.print(count);
    delay(1000);
    }

    void setup()
    {
    lcd.begin(16,2);
    lcd.print("Visitor Counter");
    delay(2000);
    pinMode(in, INPUT);
    pinMode(out, INPUT);
    pinMode(relay, OUTPUT);
    lcd.clear();
    lcd.print("Person In Room:");
    lcd.setCursor(0,1);
    lcd.print(count);
    }

    void loop()
    {

    if(digitalRead(in)){
    IN();}
    if(digitalRead(out)){
    OUT();}

    if(count<=0)
    {
    lcd.clear();
    digitalWrite(relay, LOW);
    lcd.clear();
    lcd.print("Nobody In Room");
    lcd.setCursor(0,1);
    lcd.print("Light Is Off");
    delay(200);
    }

    else
    digitalWrite(relay, HIGH);

    }

    ReplyDelete
  7. Unknown8 October 2021 at 21:50

    Bro here we are useing fan not light with relay and pin layout is also different

    ReplyDelete
  8. Unknown17 October 2021 at 00:44

    Code wrong hai ☺️ please help me

    ReplyDelete

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