At the start of this summer, I gave myself a challenge: design a low-cost, user-friendly system that could help senior citizens keep track of their daily events without needing phones or complicated apps. After some trial and error (and a few burnt wires), I built a working reminder display system powered by a Raspberry Pi and RFID wristbands.
The Problem I Wanted to Solve
In many senior care centers, residents struggle with remembering scheduled activities, medication times, or events. Most reminder solutions require caregivers to provide constant verbal updates or rely on smartphones — which can be confusing or inaccessible for seniors. I wanted something simple, physical, and automatic.
What I Built
The final setup works like this:
Each senior receives an RFID wristband.
A Raspberry Pi 4 powers a display screen with an RFID sensor attached.
When a wristband is scanned, the screen pulls up a list of that individual’s upcoming events for the day.
Events are stored and managed through a Google Sheet, so caregivers can easily update schedules without needing to code anything.
Once the user is done viewing the display, the screen automatically returns to a welcome screen.
Technologies Used
Raspberry Pi 4
RFID Reader + Wristbands
Google Sheets API
Python (for data processing and UI display)
Why This Matters
The entire project costs less than $100 to set up. It doesn’t require internet once deployed and doesn’t track any personal data — making it both accessible and privacy-safe. I imagine it being used in retirement homes, adult daycares, or even personal households. And because the schedule input is through Google Sheets, any caretaker can update it with zero technical knowledge.
What I Learned
Working with hardware taught me how to debug in real-time.
Building a system for others — especially seniors — forced me to focus on user experience and simplicity.
Integrating APIs like Google Sheets made me more confident in bridging software with the physical world.
What’s Next?
This project is finished for now, but I’m looking into how I can make it even more modular, maybe by:
Adding voice prompts for accessibility
Storing data locally in case of network issues
Testing it in a real senior care environment
If you’d like to learn more or collaborate, feel free to reach out — I’d love to hear feedback or ideas.
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