🏠 Smart Home Alarm System with micro:bit and Flask

📌 Project Overview

This project aims to build a smart home automation system using micro:bit boards that can detect and monitor essential environmental conditions for home safety and comfort.

The system consists of two micro:bit boards, various environmental sensors, and a Flask web app to display data in real-time.

🧠 Key Features

• 🌡️ Detects ambient temperature
• 💡 Monitors room light intensity
• 🚪 Detects door status (open/closed)
• 🚨 Detects motion/presence
• 🔊 Alarm control with states: DISARM, ARM, SOS
• 🌬️ Automatically activates fan when temperature is high
• 🌐 Web interface with real-time updates

⚙️ Hardware Components

• 2x BBC micro:bit
• LM35 (Temperature sensor)
• PIR Motion Sensor
• Hall Magnetic Sensor (door detection)
• RGB LED Module
• Fan
• Jumper wires and breadboard

📌 Pin Configuration

Component	micro:bit Pins
LM35 Temp. Sensor	S=3, V=3, G=3
PIR Motion Sensor	S=8, V=8, G=8
RGB LED	R=S2, G=S1, B=S4, V=V1
Hall Magnetic Sensor	S=9, V=9, G=9
Magnetic door	Ina=S7, Inb=S10
Fan	V=V2, GND=G10

🧪 System Architecture

1. Sensor Micro:bit:

   • Collects environmental data from sensors
   • Sends data via radio to the receiver micro:bit

2. Receiver Micro:bit:

   • Connected to PC via USB
   • Sends data via serial to the Flask web app

3. Web App (Flask):

   • Reads data from serial port
   • Stores and manages state using SQLite
   • Displays data through a simple dashboard (HTML/CSS/JS)

🖥️ Technologies Used

• MicroPython (for micro:bit)
• Python 3 + Flask (backend)
• SQLite (database)
• HTML/CSS/JavaScript (frontend)

🚀 How to Run

1. Connect the receiver micro:bit to your PC via USB.
2. Start the Flask server:

   python app_flask/app.py

3. Power on the sensor micro:bit: data transmission begins.
4. Visit the interface at http://localhost:5000.

🔧 Web Interface Controls

• ARM: Activate alarm
• DISARM: Deactivate alarm
• SOS: Emergency state
• Light control (toggle on/off + set intensity)

🧠 Technical Notes

• The project started using Blazor, but due to serial communication issues, it was migrated to Flask.
• Real-time updates are handled via JavaScript that refreshes the page upon state changes.

🙋‍♂️ Authors

• Luigi Gorgone - https://github.com/luishasleft
• Ludovica Gatti - https://github.com/G4tten
• Emanuele Marcello - https://github.com/MarcelloEmanuele