Life Saver Project: Door-Activated Study Mode

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Step-by-Step Guide:

This guide will walk you through building a system that automatically switches your computer screen to a study resource when you open the door, using an Arduino, an IR sensor, and a Python script.

Hardware Setup

1. Gather Components:

   • Arduino Uno

   • IR Sensor

   • USB cable (Arduino)

   • Jumper wires

2. Make Connections:

   • 

     Circuit

     
     

     Connect the IR sensor to the Arduino as shown in the circuit diagram:

     • IR Sensor VCC to Arduino 5V

     • IR Sensor GND to Arduino GND

     • IR Sensor OUT to Arduino Digital Pin 2

Software Setup

1. Arduino Setup

1. Install Arduino IDE:

   • Download from: https://www.arduino.cc/software

   • Install.

2. Open Arduino IDE

3. Create New Sketch

4. Copy Arduino Code:

   
   

Arduino code:

const int irSensorPin = 2; // Connect the digital IR sensor's output pin to Arduino digital pin 2 int doorOpen = false; // Flag to track if the door is considered "open" void setup() { Serial.begin(9600); pinMode(irSensorPin, INPUT); Serial.println("Digital IR Sensor Ready"); } void loop() { int sensorValue = digitalRead(irSensorPin); // Check for door opening (HIGH signal) and only trigger once if (sensorValue == HIGH && !doorOpen) { Serial.println("DOOR_OPENED"); doorOpen = true; // Set the flag to prevent repeated triggers } // Check for door closing (LOW signal) and reset the flag if (sensorValue == LOW && doorOpen) { doorOpen = false; // Reset the flag, ready for the next opening } delay(100); // Small delay }

1. Connect Arduino: Connect Arduino to computer with USB.

2. Select Arduino Board: Tools > Board > Arduino Uno

3. Select Arduino Port: Tools > Port > (Your Arduino Port)

4. Upload Code: Sketch > Upload

2. Python Setup

1. Install Python:

   • Download from: https://www.python.org/downloads/

   • Install (check "Add Python to PATH").

2. Install PySerial:

   • Open terminal/command prompt and run:

     pip install pyserial

     
     

3. Create Python Script:

   • Create a new file (e.g., life_saver.py).

4. Copy Python Code:

   
   

Python script:

import serial

import webbrowser

import time

# --- Configuration ---

serial_port = 'COM10' # Replace with your Arduino's serial port

baud_rate = 9600

study_url = "https://www.youtube.com/watch?v=jNOy11yq0gU" # Replace with your desired study webpage

trigger_message = "DOOR_OPENED"

try:

arduino_serial = serial.Serial(serial_port, baud_rate)

print(f"Connected to Arduino on {serial_port}")

time.sleep(2) # Give time for serial connection to establish

while True:

if arduino_serial.in_waiting > 0:

data = arduino_serial.readline().decode('utf-8').strip()

print(f"Received from Arduino: '{data}'")

if data == trigger_message:

print(f"'{trigger_message}' received! Opening: {study_url}")

webbrowser.open_new_tab(study_url)

except serial.SerialException as e:

print(f"Error opening serial port '{serial_port}': {e}")

except KeyboardInterrupt:

print("Exiting...")

finally:

if 'arduino_serial' in locals() and arduino_serial.is_open:

arduino_serial.close()

print("Serial port closed.")

1. Edit Python Script:

   • Set serial_port to your Arduino's port (e.g., 'COM3').

   • Set study_url to your desired webpage.

3. Run the Project

1. Connect Arduino: Arduino connected, code uploaded.

2. Open Terminal/Command Prompt

3. Navigate to Script: cd to the directory of life_saver.py.

4. Run Script: python life_saver.py

5. Test: Open/close door. Verify study URL opens.