Snap Circuits Door Alarm

1/*
2  LiquidCrystal Library - Hello World
3
4 Demonstrates the use   a 16x2 LCD display.  The LiquidCrystal
5 library works with all LCD displays that   are compatible with the
6 Hitachi HD44780 driver. There are many of them out there,   and you
7 can usually tell them by the 16-pin interface.
8
9 This sketch prints   "Hello World!" to the LCD
10 and shows the time.
11
12  The circuit:
13 *   LCD RS pin to digital pin 12
14 * LCD Enable pin to digital pin 11
15 * LCD D4   pin to digital pin 5
16 * LCD D5 pin to digital pin 4
17 * LCD D6 pin to digital   pin 3
18 * LCD D7 pin to digital pin 2
19 * LCD R/W pin to ground
20 * LCD VSS   pin to ground
21 * LCD VCC pin to 5V
22 * 10K resistor:
23 * ends to +5V and   ground
24 * wiper to LCD VO pin (pin 3)
25
26 Library originally added 18 Apr   2008
27 by David A. Mellis
28 library modified 5 Jul 2009
29 by Limor Fried (http://www.ladyada.net)
30   example added 9 Jul 2009
31 by Tom Igoe
32 modified 22 Nov 2010
33 by Tom Igoe
34   modified 7 Nov 2016
35 by Arturo Guadalupi
36
37 This example code is in the   public domain.
38
39 http://www.arduino.cc/en/Tutorial/LiquidCrystalHelloWorld
40
41*/
42
43//   include the library code:
44#include <LiquidCrystal.h>
45
46// initialize the   library by associating any needed LCD interface pin
47// with the arduino pin number   it is connected to
48const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
49LiquidCrystal   lcd(rs, en, d4, d5, d6, d7);
50
51void setup() {
52  // set up the LCD's number   of columns and rows
53  lcd.begin(16, 2);
54  pinMode(6, INPUT_PULLUP);
55  pinMode(7,   OUTPUT);
56  pinMode(8, INPUT);  
57}
58void loop() {
59
60  // Clear LCD
61   lcd.clear();
62  
63  // Check if switch is ON
64  if (digitalRead(6) == LOW)   {
65    
66    // Turn on relay
67    digitalWrite(7, LOW);
68    
69    //   Write armed status to LCD
70    lcd.setCursor(0,0);
71    lcd.print("Status:   Armed");
72
73    // Write door status to LCD
74    lcd.setCursor(2,1);
75     if (digitalRead(8) == HIGH) { 
76      lcd.print("Door: Open");
77    }   else {
78      lcd.print("Door: Closed");
79    }
80
81  // Switch is OFF   
82  } else {
83    
84    // Turn off relay
85    digitalWrite(7, HIGH);
86     
87    // Write armed status to LCD
88    lcd.setCursor(0,0);
89    lcd.print("Status:   Disarmed");
90    
91  }
92  
93  delay(1000);
94  
95}
96

1/*
2  LiquidCrystal Library - Hello World
3
4 Demonstrates the use  a 16x2 LCD display.  The LiquidCrystal
5 library works with all LCD displays that  are compatible with the
6 Hitachi HD44780 driver. There are many of them out there,  and you
7 can usually tell them by the 16-pin interface.
8
9 This sketch prints  "Hello World!" to the LCD
10 and shows the time.
11
12  The circuit:
13 *  LCD RS pin to digital pin 12
14 * LCD Enable pin to digital pin 11
15 * LCD D4  pin to digital pin 5
16 * LCD D5 pin to digital pin 4
17 * LCD D6 pin to digital  pin 3
18 * LCD D7 pin to digital pin 2
19 * LCD R/W pin to ground
20 * LCD VSS  pin to ground
21 * LCD VCC pin to 5V
22 * 10K resistor:
23 * ends to +5V and  ground
24 * wiper to LCD VO pin (pin 3)
25
26 Library originally added 18 Apr  2008
27 by David A. Mellis
28 library modified 5 Jul 2009
29 by Limor Fried (http://www.ladyada.net)
30  example added 9 Jul 2009
31 by Tom Igoe
32 modified 22 Nov 2010
33 by Tom Igoe
34  modified 7 Nov 2016
35 by Arturo Guadalupi
36
37 This example code is in the  public domain.
38
39 http://www.arduino.cc/en/Tutorial/LiquidCrystalHelloWorld
40
41*/
42
43//  include the library code:
44#include <LiquidCrystal.h>
45
46// initialize the  library by associating any needed LCD interface pin
47// with the arduino pin number  it is connected to
48const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
49LiquidCrystal  lcd(rs, en, d4, d5, d6, d7);
50
51void setup() {
52  // set up the LCD's number  of columns and rows
53  lcd.begin(16, 2);
54  pinMode(6, INPUT_PULLUP);
55  pinMode(7,  OUTPUT);
56  pinMode(8, INPUT);  
57}
58void loop() {
59
60  // Clear LCD
61  lcd.clear();
62  
63  // Check if switch is ON
64  if (digitalRead(6) == LOW)  {
65    
66    // Turn on relay
67    digitalWrite(7, LOW);
68    
69    //  Write armed status to LCD
70    lcd.setCursor(0,0);
71    lcd.print("Status:  Armed");
72
73    // Write door status to LCD
74    lcd.setCursor(2,1);
75    if (digitalRead(8) == HIGH) { 
76      lcd.print("Door: Open");
77    }  else {
78      lcd.print("Door: Closed");
79    }
80
81  // Switch is OFF  
82  } else {
83    
84    // Turn off relay
85    digitalWrite(7, HIGH);
86    
87    // Write armed status to LCD
88    lcd.setCursor(0,0);
89    lcd.print("Status:  Disarmed");
90    
91  }
92  
93  delay(1000);
94  
95}
96