Ultrasonic Home Security System (Cameran)

1#include <pitches.h>
2
3#include <SR04.h>
4SR04 ultraSonic = SR04(11,  9 );
5
6long dist;
7
8int code[] = {1, 2, 3, 4}; //the desired code is entered  in this array,
9//separated by commas
10
11int entered[5]; //create a new empty  array for the code entered by
12//the user (has 4 elements)
13
14const int LED1  = 13;
15const int LED2 = 3;
16const int LED3 = 2;
17const int buzzerPin = 8;
18const  int button1 = 4;
19const int button2 = 5;
20const int button3 = 6;
21const int  button4 = 7;
22const int timerdelay = 250;
23
24const int redLED = 12;
25const  int greenLED = 10;
26void checkEntered1(int button);
27
28void setup() {
29  // put your setup code here, to run once:
30  pinMode(LED1, OUTPUT);
31  pinMode(LED2,  OUTPUT);
32  pinMode(LED3, OUTPUT);
33  pinMode(buzzerPin, OUTPUT);
34  Serial.begin(9600);
35  digitalWrite(LED1, LOW);
36  digitalWrite(LED2, LOW);
37  digitalWrite(LED3,  LOW);
38  delay(1000);
39  Serial.begin(9600); //begin Serial
40
41  pinMode  (button1, INPUT);
42  pinMode (button2, INPUT);
43  pinMode (button3, INPUT);
44  pinMode (button4, INPUT);
45  pinMode (greenLED, OUTPUT);
46  pinMode (redLED,  OUTPUT);
47
48  digitalWrite(redLED, LOW);
49  digitalWrite(greenLED, LOW);
50  for (int i = 0; i < 4; i++) { //work through numbers 0-3
51    Serial.println(code[i]);  //print each digit of the code
52    Serial.println(entered[i]); //print each element  of the entered[]
53
54  }
55}
56
57void loop() {
58  // put your main code  here, to run repeatedly:
59  dist = ultraSonic.Distance();
60  Serial.print(dist);
61  Serial.println("cm");
62  delay(100);
63  if (dist > 100) {
64    digitalWrite(LED1,  LOW);
65    digitalWrite(LED2, LOW);
66    digitalWrite(LED3, LOW);
67  }
68  if (dist > 2 && dist <= 25) {
69    digitalWrite(LED1, HIGH);
70    digitalWrite(LED2,  LOW);
71    digitalWrite(LED3, LOW);
72    tone(buzzerPin, NOTE_G4, 15000);
73  }
74  else if (dist > 25 && dist <= 75) {
75    digitalWrite(LED1, LOW);
76    digitalWrite(LED2, HIGH);
77    digitalWrite(LED3, LOW);
78  }
79  else if  (dist > 75 && dist <= 100) {
80    digitalWrite(LED1, LOW);
81    digitalWrite(LED2,  LOW);
82    digitalWrite(LED3, HIGH);
83  }
84
85  if (digitalRead(button1)  == HIGH) { //if button1 is pressed
86    checkEntered1(1); //call checkEntered  and pass it a 1
87
88    delay(timerdelay);//wait, needed for correct functioning,  otherwise
89    //buttons are deemed to be pressed more than once
90
91  }
92  else if (digitalRead(button2) == HIGH) { //if button2 is pressed
93    checkEntered1(2);  //call checkEntered1 and pass it a 2
94
95    delay(timerdelay); //wait
96
97  }
98  else if (digitalRead(button3) == HIGH) { //if button3 is pressed
99    checkEntered1(3);  //call checkEntered1 and pass it a 3
100
101    delay(timerdelay); //wait
102
103  }
104  else if (digitalRead(button4) == HIGH) { //if button4 is pressed
105    checkEntered1(4);  //call checkEntered1 and pass it a 4
106
107    delay(timerdelay); //wait
108
109  }
110}
111
112void checkEntered1(int button) { //check the first element of the  entered[] array
113  if (entered[0] != 0) { //if it is not a zero, i.e. it has already  been inputted
114    checkEntered2(button); //move on to checkEntered2, passing  it "button"
115  }
116
117  else if (entered[0] == 0) { //if it is zero, i.e.  if it hasn't been defined with a button yet
118    entered[0] = button; //set the  first element as the button that has been pressed
119    Serial.print("1: ");  Serial.println(entered[0]); //for debugging
120  }
121
122}
123
124void checkEntered2(int  button) { //check the second element of the entered[] array
125
126  if (entered[1]  != 0) { //if it is not a zero, i.e. it has already been inputted
127    checkEntered3(button);  //move on to checkEntered3, passing it "button"
128  }
129
130  else if (entered[1]  == 0) { //if it is zero, i.e. if it hasn't been defined with a button yet
131    entered[1]  = button; //set the second element as the button that has been pressed
132    Serial.print("2:  "); Serial.println(entered[1]); //for debugging
133  }
134
135}
136
137void checkEntered3(int  button) { //check the third element of the entered[] array
138  if (entered[2] !=  0) { //if it is not a zero, i.e. it has already been inputted
139    checkEntered4(button);  //move on to checkEntered4, passing it "button"
140  }
141
142  else if (entered[2]  == 0) { //if it is zero, i.e. if it hasn't been defined with a button yet
143    entered[2]  = button; //set the third element as the button that has been pressed
144    Serial.print("3:  "); Serial.println(entered[2]); //for debugging
145  }
146
147}
148
149void checkEntered4(int  button) { //check the third element of the entered[] array
150  if (entered[3] ==  0) { //if it is zero, i.e. if it hasn't been defined with a button yet
151    entered[3]  = button; //set the final element as the button that has been pressed
152    Serial.print("4:  "); Serial.println(entered[3]); //for debugging
153    delay(100); //allow time  for processing
154    compareCode(); //call the compareCode function
155  }
156}
157
158
159
160void  compareCode() { //checks if the code entered is correct by comparing the code[]  array with the entered[] array
161  for (int i = 0; i < 4; i++) { //these three  lines are for debugging
162    Serial.println(entered[i]);
163  }
164  if ((entered[0]  == code[0]) && (entered[1] == code[1]) && (entered[2] == code[2]) && (entered[3]  == code[3])) { //if all the elements of each array are equal
165    digitalWrite(redLED,  LOW); // turn the red LED off
166    digitalWrite(greenLED, HIGH); //turn the green  LED on
167    delay(1000); //wait for a bit
168    digitalWrite(greenLED, LOW);  //turn the green LED off
169    noTone(buzzerPin);
170
171
172
173    for (int i  = 0; i < 5; i++) { //this next loop is for debugging
174      entered[i] = 0;
175
176    }
177
178    //loop(); //return to loop() (not really necessary)
179
180  }
181  else { //if you (or the intruder) get the code wrong
182
183    digitalWrite(redLED,  HIGH);
184    delay(1000);
185    digitalWrite(redLED, LOW);
186    Serial.println("Red  on");
187    for (int i = 0; i < 5; i++) { //this next loop is for debugging
188      entered[i] = 0;
189
190    }
191
192  }
193
194}
195