Bidirectional Visitor Counter with Automatic Light Control

1//Visitors Counter and Automatic Room Light
2
3#include<LiquidCrystal.h>
4int  Contrast = 60;
5LiquidCrystal lcd(12,11,5,4,3,2);
6
7#define in 14
8#define  out 19
9#define relay 1
10
11int count=0;
12
13void IN()
14{
15    count++;
16    lcd.clear();
17    lcd.print("Person In Room:");
18    lcd.setCursor(0,1);
19    lcd.print(count);
20    delay(1000);
21}
22
23void OUT()
24{
25  count--;
26    lcd.clear();
27    lcd.print("Person In Room:");
28    lcd.setCursor(0,1);
29    lcd.print(count);
30    delay(1000);
31}
32
33void setup()
34{
35  analogWrite(6,  Contrast);
36  lcd.begin(16,2);
37  lcd.print("Visitor Counter");
38  delay(2000);
39  pinMode(in, INPUT);
40  pinMode(out, INPUT);
41  pinMode(relay, OUTPUT);
42  lcd.clear();
43  lcd.print("Person In Room:");
44  lcd.setCursor(0,1);
45  lcd.print(count);
46}
47
48void loop()
49{  
50  
51  if(digitalRead(in))
52  IN();
53  if(digitalRead(out))
54  OUT();
55  
56  if(count<=0)
57  {
58    lcd.clear();
59    digitalWrite(relay, LOW);
60    lcd.clear();
61    lcd.print("Nobody  In Room");
62    lcd.setCursor(0,1);
63    lcd.print("Light Is Off");
64    delay(200);
65  }
66  
67  else
68    digitalWrite(relay, HIGH);
69  
70}
71

1//Visitors Counter and Automatic Room Light
2
3#include<LiquidCrystal.h>
4int
5  Contrast = 60;
6LiquidCrystal lcd(12,11,5,4,3,2);
7
8#define in 14
9#define
10  out 19
11#define relay 1
12
13int count=0;
14
15void IN()
16{
17    count++;
18
19    lcd.clear();
20    lcd.print("Person In Room:");
21    lcd.setCursor(0,1);
22
23    lcd.print(count);
24    delay(1000);
25}
26
27void OUT()
28{
29  count--;
30
31    lcd.clear();
32    lcd.print("Person In Room:");
33    lcd.setCursor(0,1);
34
35    lcd.print(count);
36    delay(1000);
37}
38
39void setup()
40{
41  analogWrite(6,
42  Contrast);
43  lcd.begin(16,2);
44  lcd.print("Visitor Counter");
45  delay(2000);
46
47  pinMode(in, INPUT);
48  pinMode(out, INPUT);
49  pinMode(relay, OUTPUT);
50
51  lcd.clear();
52  lcd.print("Person In Room:");
53  lcd.setCursor(0,1);
54
55  lcd.print(count);
56}
57
58void loop()
59{  
60  
61  if(digitalRead(in))
62
63  IN();
64  if(digitalRead(out))
65  OUT();
66  
67  if(count<=0)
68  {
69
70    lcd.clear();
71    digitalWrite(relay, LOW);
72    lcd.clear();
73    lcd.print("Nobody
74  In Room");
75    lcd.setCursor(0,1);
76    lcd.print("Light Is Off");
77    delay(200);
78
79  }
80  
81  else
82    digitalWrite(relay, HIGH);
83  
84}
85