Door Alarm Sensor (Wired)

Protect your home with a simple magnetic sensor and alarm with an arduino uno.

Jun 18, 2020

•

7150 views

•

2 respects

security

Components and supplies

Resistor 330 ohm

Jumper wires (generic)

Arduino UNO

Breadboard (generic)

Resistor 10k ohm

5 mm LED: Red

Buzzer, Piezo

5 mm LED: Yellow

Reed Switch, Magnet Switch Set

Tools and machines

Solder Wire, Lead Free

Soldering iron (generic)

Project description

Code

Door Alarm Sensor Code

arduino

1int buzzer = 9; 
2int red = 13;
3int yellow = 12;
4int yellowState  = LOW;
5int REED = 3;
6int redState = HIGH;
7int proximity = LOW;
8int proximityprevious  = LOW;
9
10
11void setup(){
12  pinMode(yellow,OUTPUT);
13  pinMode(buzzer,  OUTPUT); 
14  pinMode(red, OUTPUT);
15  pinMode(REED, INPUT_PULLUP);
16      
17  if (yellowState == LOW)       
18  tone(buzzer,2500);
19  delay(900);
20  noTone(buzzer);
21  }
22 
23
24
25void loop(){
26
27proximity = digitalRead(REED); 
28
29if  (proximityprevious == HIGH)
30{
31  proximity = HIGH;
32}
33
34
35
36
37  
38    if (proximity == HIGH)
39      
40             
41   {
42              proximityprevious  = HIGH;     
43              yellowState = LOW;             
44             digitalWrite(red,  HIGH);
45             delay(45);
46             digitalWrite(red, LOW);
47             delay(5);  
48             tone(buzzer, 3000); 
49             delay(200);        
50             noTone(buzzer);     
51             delay(100);       
52}
53            
54    else
55             {
56              yellowState = HIGH;
57             redState = LOW;
58             }
59                
60                
61           
62   
63
64     
65{
66digitalWrite(red,redState);
67digitalWrite(yellow,yellowState);
68
69  
70
71}
72}
73             
74
75

int buzzer = 9; 
int red = 13;
int yellow = 12;
int yellowState  = LOW;
int REED = 3;
int redState = HIGH;
int proximity = LOW;
int proximityprevious  = LOW;


void setup(){
  pinMode(yellow,OUTPUT);
  pinMode(buzzer,  OUTPUT); 
  pinMode(red, OUTPUT);
  pinMode(REED, INPUT_PULLUP);
      
  if (yellowState == LOW)       
  tone(buzzer,2500);
  delay(900);
  noTone(buzzer);
  }
 


void loop(){

proximity = digitalRead(REED); 

if  (proximityprevious == HIGH)
{
  proximity = HIGH;
}




  
    if (proximity == HIGH)
      
             
   {
              proximityprevious  = HIGH;     
              yellowState = LOW;             
             digitalWrite(red,  HIGH);
             delay(45);
             digitalWrite(red, LOW);
             delay(5);  
             tone(buzzer, 3000); 
             delay(200);        
             noTone(buzzer);     
             delay(100);       
}
            
    else
             {
              yellowState = HIGH;
             redState = LOW;
             }
                
                
           
   

     
{
digitalWrite(red,redState);
digitalWrite(yellow,yellowState);

  

}
}

Door Alarm Sensor Code

arduino

1int buzzer = 9; 
2int red = 13;
3int yellow = 12;
4int yellowState   = LOW;
5int REED = 3;
6int redState = HIGH;
7int proximity = LOW;
8int proximityprevious   = LOW;
9
10
11void setup(){
12  pinMode(yellow,OUTPUT);
13  pinMode(buzzer,   OUTPUT); 
14  pinMode(red, OUTPUT);
15  pinMode(REED, INPUT_PULLUP);
16      
17   if (yellowState == LOW)       
18  tone(buzzer,2500);
19  delay(900);
20  noTone(buzzer);
21   }
22 
23
24
25void loop(){
26
27proximity = digitalRead(REED); 
28
29if   (proximityprevious == HIGH)
30{
31  proximity = HIGH;
32}
33
34
35
36
37   
38    if (proximity == HIGH)
39      
40             
41   {
42              proximityprevious   = HIGH;     
43              yellowState = LOW;             
44             digitalWrite(red,   HIGH);
45             delay(45);
46             digitalWrite(red, LOW);
47             delay(5);   
48             tone(buzzer, 3000); 
49             delay(200);        
50             noTone(buzzer);      
51             delay(100);       
52}
53            
54    else
55             {
56               yellowState = HIGH;
57             redState = LOW;
58             }
59                 
60                
61           
62   
63
64     
65{
66digitalWrite(red,redState);
67digitalWrite(yellow,yellowState);
68
69   
70
71}
72}
73             
74
75

int buzzer = 9; 
int red = 13;
int yellow = 12;
int yellowState   = LOW;
int REED = 3;
int redState = HIGH;
int proximity = LOW;
int proximityprevious   = LOW;


void setup(){
  pinMode(yellow,OUTPUT);
  pinMode(buzzer,   OUTPUT); 
  pinMode(red, OUTPUT);
  pinMode(REED, INPUT_PULLUP);
      
   if (yellowState == LOW)       
  tone(buzzer,2500);
  delay(900);
  noTone(buzzer);
   }
 


void loop(){

proximity = digitalRead(REED); 

if   (proximityprevious == HIGH)
{
  proximity = HIGH;
}




   
    if (proximity == HIGH)
      
             
   {
              proximityprevious   = HIGH;     
              yellowState = LOW;             
             digitalWrite(red,   HIGH);
             delay(45);
             digitalWrite(red, LOW);
             delay(5);   
             tone(buzzer, 3000); 
             delay(200);        
             noTone(buzzer);      
             delay(100);       
}
            
    else
             {
               yellowState = HIGH;
             redState = LOW;
             }
                 
                
           
   

     
{
digitalWrite(red,redState);
digitalWrite(yellow,yellowState);

   

}
}

Downloadable files

Door Alarm Sensor Setup

The yellow LED remains on all the time. The red LED blinks and the buzzer sounds when the door is opened/ alarm is triggered. The alarm does not stop until you press the reset button on the arduino or disconnect from power. I used a Wemo plug to set the time that I want the alarm to be on and to have easier access to an OFF switch in case the alarm sounds.

Door Alarm Sensor Setup

Comments

Only logged in users can leave comments

kyanl00

2 years ago

I'm glad this works because I didn't have too much hope for this.

avalosservando23

0 Followers

•

1 Projects

Intro

Components and supplies

Tools and machines

Project description

Code

Downloadable files