Importance and Utility of Door/Window Detection

Door/Window detection is a crucial aspect of home security and automation systems. By implementing a door/window detection system, homeowners can monitor and control the status of their doors and windows remotely. This allows for enhanced security, energy efficiency, and convenience. For example, the system can send notifications to the homeowner's smartphone if a door or window is left open, allowing them to take appropriate action. Additionally, the system can be integrated with other home automation devices, such as smart thermostats, to optimize energy usage based on the open/closed status of doors and windows.

Project: Door/Window Detection System

The project aims to create a door/window detection system using Arduino. The system will consist of magnetic reed switches, an Arduino board, and an LCD display. The objectives of the project are:

1. Detect the open/closed status of doors and windows using magnetic reed switches.
2. Display the status of each door/window on an LCD display.
3. Send notifications to a smartphone or other device when a door/window is left open.
4. Integrate with other home automation devices to optimize energy usage.

List of Components:

1. Arduino Uno: 1x - Link
2. Magnetic Reed Switches: 1x per door/window - Link
3. LCD Display: 1x - Link
4. Jumper Wires: As required - Link

Examples:

Example 1: Door/Window Status Display

#include <LiquidCrystal_I2C.h>

// Initialize the LCD display
LiquidCrystal_I2C lcd(0x27, 16, 2);  // Set the LCD I2C address and dimensions

// Define the pin for the magnetic reed switch
const int doorSwitchPin = 2;

void setup() {
  // Initialize the LCD display
  lcd.begin(16, 2);
  lcd.print("Door/Window");
  lcd.setCursor(0, 1);
  lcd.print("Status: Closed");

  // Set the door switch pin as input
  pinMode(doorSwitchPin, INPUT);
}

void loop() {
  // Read the status of the door switch
  int doorStatus = digitalRead(doorSwitchPin);

  // Update the LCD display based on the door status
  lcd.setCursor(0, 1);
  if (doorStatus == HIGH) {
    lcd.print("Status: Open  ");
  } else {
    lcd.print("Status: Closed");
  }

  delay(500);
}

Example 2: Door/Window Notification

#include <Wire.h>
#include <Adafruit_SSD1306.h>

// Initialize the OLED display
Adafruit_SSD1306 display(128, 64, &Wire, -1);

// Define the pin for the magnetic reed switch
const int doorSwitchPin = 2;

void setup() {
  // Initialize the OLED display
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(SSD1306_WHITE);

  // Set the door switch pin as input
  pinMode(doorSwitchPin, INPUT);
}

void loop() {
  // Read the status of the door switch
  int doorStatus = digitalRead(doorSwitchPin);

  // Display the door status on the OLED display
  display.clearDisplay();
  display.setCursor(0, 0);
  if (doorStatus == HIGH) {
    display.println("Door: Open");
    // Send notification to smartphone
    // Code for notification goes here
  } else {
    display.println("Door: Closed");
  }
  display.display();

  delay(500);
}