Arduino Based Smoke Detector

1//Program to 
2#include <LiquidCrystal.h>
3
4LiquidCrystal lcd(2,  3, 4, 5, 6, 7);
5
6
7//int Buzzer = 10;
8
9int led = 12;
10
11int Gassensor  = A0;
12
13int motor11 = 10;
14
15int motor12 = 11;
16
17
18
19
20void  setup() 
21
22{
23
24   //pinMode(Buzzer,OUTPUT);
25
26   pinMode(motor11,OUTPUT);
27
28   pinMode(motor12,OUTPUT);
29
30   pinMode(led,OUTPUT);
31
32   Serial.begin(9600);
33
34   
35
36   lcd.begin(16, 2);
37
38  lcd.print("ENGINEERS GARAGE");
39
40  lcd.setCursor(0, 1);
41
42}
43
44
45
46void loop() {
47
48
49  int sensorValue  = analogRead(Gassensor);
50
51  Serial.println(sensorValue);
52
53  delay(1);      
54
55  
56
57  if(sensorValue < 200)
58
59  {
60
61   // digitalWrite(Buzzer,HIGH);
62
63    
64
65    digitalWrite(led,HIGH);
66
67    delay(1000);
68
69    digitalWrite(motor11,HIGH);
70
71    digitalWrite(motor12,LOW);
72
73    delay(500);
74
75    digitalWrite(motor11,LOW);
76
77    digitalWrite(motor12,LOW);
78
79    delay(1000);
80
81    
82
83    lcd.setCursor(0,  2);
84
85  lcd.print("Smoke Not Detected");
86
87  
88
89  }
90
91  else  if (sensorValue > 400)
92
93  {
94
95   // digitalWrite(Buzzer,LOW);
96
97    
98
99    digitalWrite(led,LOW);
100
101    delay(1000);
102
103  
104
105    digitalWrite(motor11,LOW);
106
107    digitalWrite(motor12,LOW);
108
109    delay(1000);
110
111    
112
113    lcd.setCursor(0, 2);
114
115  lcd.print("Smoke Detected");
116
117  
118
119  }
120
121}