├── readme.md
└── arduino-waving.ino


/readme.md:
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1 | # Arduino Waving
2 | 
3 | ## Post
4 | 
5 |  - [http://www.jamesbooth.net/blog/2014/10/28/making-things-club-aka-jjlpr](http://www.jamesbooth.net/blog/2014/10/28/making-things-club-aka-jjlpr)
6 | 
7 | 


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/arduino-waving.ino:
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 1 | #include <Servo.h>
 2 | 
 3 | Servo servo;
 4 | 
 5 | // pins
 6 | const int lightSensorPin = 0;
 7 | const int servoPin = 9;
 8 | 
 9 | // light value
10 | int lightVal = 0;
11 | int prevLightSensorValue = 0;
12 | 
13 | // arbiatary light level to start waving at
14 | int standardLightLevel = 90;
15 | int minLightLevelDiff = 5;
16 | 
17 | // waving
18 | boolean waving = false;
19 | int angles[] = {0, 100, 60, 100, 60, 100, 60, 100, 60, 100, 0};
20 | int anglesLength = 11;
21 | int index = 0;
22 | 
23 | // delay
24 | long previousMillis = 0;
25 | long interval = 500;
26 | 
27 | 
28 | // run once
29 | void setup() {
30 |   Serial.begin(9600);
31 |   
32 |   pinMode(lightSensorPin, INPUT);
33 |   
34 |   servo.attach(servoPin);
35 | }
36 | 
37 | 
38 | // run forever
39 | void loop() {
40 | 
41 |   // LIGHT SENSOR
42 |  
43 |   if(waving == false) {
44 |     int lightSensorValue = analogRead(lightSensorPin);
45 |     Serial.println(lightSensorValue);
46 |     if(prevLightSensorValue != 0) {
47 |       int diff = standardLightLevel - lightSensorValue;
48 |       if(diff > minLightLevelDiff) {
49 |         waving = true;
50 |       }
51 |     }
52 |     prevLightSensorValue = lightSensorValue;
53 |   }
54 |  
55 |   // WAVING
56 |   
57 |   if(doInterval() && doWave()) {
58 |     wave();
59 |   }
60 | }
61 | 
62 | // METHODS
63 |   
64 | boolean doWave() {
65 |   if(waving) {
66 |     if(index < anglesLength) {
67 |       Serial.println(index);
68 |       return true;
69 |     }
70 |     else {
71 |       endWave(); 
72 |     }
73 |   }
74 |   return false;
75 | }
76 | 
77 | boolean doInterval() {
78 |   unsigned long currentMillis = millis();
79 |   if(currentMillis - previousMillis > interval) {
80 |     previousMillis = currentMillis;
81 |     return true;
82 |   }
83 |   return false;
84 | }
85 | 
86 | void wave() {
87 |   Serial.println("wave");
88 |   int servoAngle = angles[index];
89 |   servo.write(servoAngle);
90 |   index++;
91 | }
92 | 
93 | void endWave() {
94 |   waving = false;
95 |   index = 0;
96 |   delay(2000);
97 | }
98 | 
99 | 


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