Architectural Model of a Bus Stop with Automatic Sunshade

1#include <Servo.h>
2
3int easternLight = 0;
4int westernLight =
5  0;
6int rainSensed = 0;
7int sunshadePosition = 0;
8int rainRhreshold = 512;
9int
10  sunshadeExpanded = 120;
11int sunshadeContracted = 60;
12int ambientLighting =
13  0;
14int turnOnLightsOn = 150;
15int ledIntensity = 0;
16int ledPower = 0;
17Servo
18  servo;
19
20void setup()
21{
22  pinMode(A4, OUTPUT); // Interior lighting of
23  the bus stop
24  pinMode(A5, OUTPUT); // Street light
25  pinMode(A1, INPUT);
26  // Western light
27  pinMode(A2, INPUT); // Eastern light
28  pinMode(A3, INPUT);
29  // Rain sensor analog
30  pinMode(2, INPUT); // Rain sensor digital
31  servo.attach(A0);
32  // Servo
33  servo.write(sunshadeContracted);
34}
35
36void loop()
37{
38
39  // Get sensor values
40  easternLight = analogRead(A2);
41  westernLight = analogRead(A1);
42
43  rainSensed = analogRead(A3);
44  sunshadePosition = servo.read();
45  ambientLighting
46  = ((easternLight + westernLight) / 2); // Average the brightness of the east and
47  west
48  // Find out if it is raining?
49  if (rainSensed < rainRhreshold) {
50
51    // It is raining
52    if (sunshadePosition != sunshadeExpanded) {
53      servo.write(sunshadeExpanded);
54
55    }
56  } else {
57    // It is not raining
58    if (ambientLighting <= turnOnLightsOn)
59  {
60      // It's getting dark, turn on the lights
61      ledPower = ((turnOnLightsOn
62  - ambientLighting) * 4);
63      analogWrite(A5, ledPower);
64      analogWrite(A4,
65  ledPower);
66    } else {
67      // There is a lot of sun light
68      analogWrite(A5,
69  0);
70      analogWrite(A4, 0);
71      if (easternLight <= westernLight) {
72
73        // It's sunset
74        if (sunshadePosition != sunshadeExpanded) {
75
76          servo.write(sunshadeExpanded);
77        }
78      }
79      if (easternLight
80  > westernLight) {
81        // It's down
82        if (sunshadePosition != sunshadeContracted)
83  {
84          servo.write(sunshadeContracted);
85        }
86      }
87    }
88
89  }
90  delay(100);
91}