Table of Contents

Introduction

As we moved into Week 10, the focus of our project became more technical, more detailed - and far more tangible. This week marked a decisive step forward in both the digital and physical dimensions of our solution, as we dove into software development, sensor integration, 3D design, and even a strategic pivot in our system architecture.

It was a demanding week, but one filled with momentum.

Our Developments

Software for Sensors

Rodrigo and Hugo led the charge on the software development side, kicking off the integration of the presence and door sensors into our system. Beyond just reading signals, the challenge was to develop logic for event detection - ensuring that the system can reliably distinguish between meaningful activity and background noise.

By the end of the week, we had the beginnings of a detection algorithm that could interpret real-world interactions and translate them into accurate, actionable data.

3D Modelling the Wearable

While the codebase was taking shape, João began work on the 3D modelling of our wristband using Fusion 360. This digital prototype allows us to visualize the housing for the electronics and evaluate dimensions, fit, and feasibility — before committing to a physical print.

It’s not just about aesthetics. This modelling phase helps us avoid design flaws early and ensures that the final prototype will be comfortable, compact, and manufacturable.

Assembling and Testing the Sensors

Meanwhile, sensor assembly officially began. We installed, connected, and tested the hardware components - from magnetic door sensors to presence detectors - directly on our prototype.

This hands-on phase was critical: testing the sensors under semi-real conditions helped us identify small but important adjustments, especially when it came to signal noise and compatibility with our in-progress software.

Embracing Home Assistant

Perhaps the biggest strategic decision of the week came on the system architecture front.

Originally, we had been developing a custom backend server to manage communication and data flow - but as development progressed, it became clear that this path was becoming more limiting than liberating. After evaluating alternatives, Gonçalo implemented a transition to Home Assistant, a powerful open-source platform that better supports the modular, scalable nature of our system.

This shift unlocks more flexibility, reduces unnecessary overhead, and keeps us focused on what matters: building a system that works well — not reinventing the wheel.

Alert Logic: Real-Time Event Notifications

With sensors being integrated and the architecture evolving, we also designed a real-time alert system to cover a range of scenarios. This included defining rules for when and how users should be notified, ensuring that events like presence detection or door activity are captured quickly and reliably.

The result? A system that not only detects — but responds intelligently.

Week Recap

Week 10 was all about building the foundation: integrating hardware, writing meaningful code, refining our design, and making a smart architectural pivot that will support us through the final stretch.

We’re no longer just theorizing. We’re executing.

As we move ahead, the focus will shift toward:

• Refining the prototype and testing modules in tandem

• Printing the physical casing for the wearable

• Enhancing alert accuracy through real-world testing

The vision is now supported by something real - and every new layer brings us closer to a system that not only works but matters.

Stay with us — the pieces are coming together.