Affordable air quality sensor

1
2
3#define sensor    A0 
4 const int r = 11;
5 const int g =10;
6  const int b= 9;
7int gasLevel = 0;         
8String quality =""; 
9
10void  setup() {
11  Serial.begin(9600);
12  pinMode(sensor,INPUT);
13 pinMode(r, OUTPUT)  ;
14 pinMode( g, OUTPUT);
15 pinMode (b, OUTPUT);
16
17}
18
19void setColor(int  red, int green, int blue) {
20
21  analogWrite(r, red );
22  analogWrite(g, green  );
23  analogWrite(b, blue );
24
25}
26
27void loop()
28{
29  gasLevel =  analogRead(sensor);
30
31  if(gasLevel<91){
32    quality = "  Perfect!";
33    setColor(0,0,127);
34  }
35  else if (gasLevel >91 && gasLevel<115){
36    quality  = "  Poor!";
37    setColor(0,46,63);
38  }
39  else if (gasLevel >115 && gasLevel<130){
40    quality = "Very bad!";
41    setColor(0,127,0);
42  }  
43    else if (gasLevel  >130 && gasLevel<150){
44    quality = "see ya!";
45    setColor(127,30,0);
46   
47  }
48    else if ( gasLevel >150 && gasLevel< 175  0){
49    quality =  " Eating nuclear waste is better";
50
51    setColor(127,13,0);
52    }  
53    
54
55    else if (gasLevel<200 ) {
56      quality = "Nice knowing you";
57      setColor(127,0,0);
58    }
59
60
61  Serial.println("Air Quality:");
62
63  Serial.println(quality); 
64  Serial.println(analogRead(0));
65
66  delay(2000);  
67}
68
69

1
2
3#define sensor    A0 
4 const int r = 11;
5 const int g =10;
6
7  const int b= 9;
8int gasLevel = 0;         
9String quality =""; 
10
11void
12  setup() {
13  Serial.begin(9600);
14  pinMode(sensor,INPUT);
15 pinMode(r, OUTPUT)
16  ;
17 pinMode( g, OUTPUT);
18 pinMode (b, OUTPUT);
19
20}
21
22void setColor(int
23  red, int green, int blue) {
24
25  analogWrite(r, red );
26  analogWrite(g, green
27  );
28  analogWrite(b, blue );
29
30}
31
32void loop()
33{
34  gasLevel =
35  analogRead(sensor);
36
37  if(gasLevel<91){
38    quality = "  Perfect!";
39
40    setColor(0,0,127);
41  }
42  else if (gasLevel >91 && gasLevel<115){
43    quality
44  = "  Poor!";
45    setColor(0,46,63);
46  }
47  else if (gasLevel >115 && gasLevel<130){
48
49    quality = "Very bad!";
50    setColor(0,127,0);
51  }  
52    else if (gasLevel
53  >130 && gasLevel<150){
54    quality = "see ya!";
55    setColor(127,30,0);
56
57   
58  }
59    else if ( gasLevel >150 && gasLevel< 175  0){
60    quality =
61  " Eating nuclear waste is better";
62
63    setColor(127,13,0);
64    }  
65
66    
67
68    else if (gasLevel<200 ) {
69      quality = "Nice knowing you";
70
71      setColor(127,0,0);
72    }
73
74
75  Serial.println("Air Quality:");
76
77
78  Serial.println(quality); 
79  Serial.println(analogRead(0));
80
81  delay(2000);
82  
83}
84
85