Home system

1//this arduino with serve as a home detection device
2//it will unlock if it detects motion 
3//when motion is sensed, rgb light will turn green
4//when there is no motion, rgb light will turn purple
5//dc motor will spin when motion is detected
6//dc motor will not spin if there isn't any motion detected
7//there will be an emergency button and it will
8//play an alarm and turn rgb red
9#include <LiquidCrystal.h>
10#include <Servo.h>
11
12//lcd
13const int RS = 2;
14const int E = 3;
15const int DB4 = 4;
16const int DB5 = 5;
17const int DB6 = 6;
18const int DB7 = 7;
19const int RED_LED = 9;
20const int GREEN_LED = 10;
21const int BLUE_LED = 11;
22
23LiquidCrystal lcd(RS, E, DB4, DB5, DB6, DB7);
24
25//PIR sensor
26const int PIR = 8;
27int pirState;
28//Servo
29const int SERVO_PIN = A0;
30Servo servo;
31const int LAG = 200;
32int doorState = 1;
33//DC motor
34const int DC_MOTOR = 12;
35const int OFF = 0;
36const int ON = 255;
37//Piezo
38const int ALARM = 13;
39//button 
40const int BUTTON = A1;
41void updateDoorState() {
42	//First row (row 0) of lcd displays "CODE:"
43  lcd.setCursor(0, 0);
44  lcd.print("Motion:");
45  
46  //Second row (row 1) of LCD displays "DOOR:"
47  //with the state of the lock.
48  //When locked, servo move to 0 degrees
49  lcd.setCursor(0, 1);
50  lcd.print("DOOR: ");
51  if (pirState == LOW) {
52  	servo.write(0);
53    delay(LAG);
54    lcd.print("LOCKED  ");
55  }
56  else {
57  	servo.write(90);
58    delay(LAG);
59    lcd.print("UNLOCKED");
60  }
61 
62}
63
64
65void setup()
66{
67  Serial.begin(9600);
68  lcd.begin(16,2);
69  pinMode(RED_LED, OUTPUT);
70  pinMode(GREEN_LED, OUTPUT);
71  pinMode(BLUE_LED, OUTPUT);
72  pinMode(PIR, INPUT);
73  pinMode(DC_MOTOR, OUTPUT);
74  pinMode(ALARM, OUTPUT);
75  pinMode(BUTTON, INPUT);
76  servo.attach(SERVO_PIN);
77  pirState = LOW;
78  updateDoorState();
79  
80  
81}
82
83void loop()
84{
85  lcd.setCursor(7, 0);
86  pirState = digitalRead(PIR);
87    if (pirState == HIGH) {
88      lcd.print("Sensed      ");
89      displayColor(0, 255, 0);
90      analogWrite(DC_MOTOR, ON);
91     
92    }
93  else{
94  	lcd.print("none         ");
95    displayColor(255, 0, 255);
96    analogWrite(DC_MOTOR, OFF);
97  }
98 
99	 //lcd.print("");
100     //delay(1000);
101     updateDoorState();
102        delay(1000);
103  //if button is pressed, noise will play to alert people
104  //in case of an emergency
105  if(digitalRead(BUTTON)){
106    lcd.clear();
107    lcd.setCursor(0,0);
108    lcd.print("Emergency Alert");
109  	tone(ALARM, 2700, 2000);
110    displayColor(255, 0, 0);
111    delay(2000);
112  }
113  
114
115}
116
117//function for red, green, and blue colors
118void displayColor(int r, int b, int g)
119{
120	analogWrite(RED_LED, r);
121  	analogWrite(GREEN_LED, g);
122  	analogWrite(BLUE_LED, b);
123  	
124}