BlinkIn

Inspiration

What if communication could be as simple as a blink? We set out to reimagine how people connect by turning one of the most natural human actions into a discreet, hands-free messaging system. BlinkIn was born from the belief that the future of communication doesn't have to live on a screen, it can live on your face.

What it does

BlinkIn transmits encrypted messages between devices using blink patterns detected by smart glasses. Users define custom blink-to-message mappings through an iOS app, giving them full control over their personal communication language. A small LED display mounted approximately four inches from the glasses provides real-time feedback, showing the blink pattern being sent, encryption status, and delivery confirmation. The mobile app also serves as a hub for monitoring device status and managing message configurations.

How we built it

We engineered one fully functional pair of smart glasses equipped with blink-detection sensors and an integrated LED display. To validate two-way communication, we constructed a second prototype board replicating the same system architecture, effectively emulating the functionality of a complete second pair. The companion app was developed alongside the hardware to handle message customization and provide live status updates across devices.

Challenges we ran into

Security was a top priority from day one. Implementing reliable end-to-end encryption for message transmission between devices demanded careful design and testing. On the hardware side, fitting sensors and a display into a wearable glasses form factor pushed us to iterate extensively on component placement and ergonomics without compromising functionality.

Accomplishments that we're proud of

We built a working pair of smart glasses that send encrypted messages through blink detection, and proved the full two-way communication loop with our companion prototype. Seeing every layer of the system come together, hardware, encryption, LED feedback, and the companion app, into one cohesive experience was an incredibly rewarding moment for our team.

What we learned

This project pushed us across disciplines. We deepened our understanding of wearable hardware design, embedded systems, encrypted communication protocols, and mobile app development. More importantly, we learned how to bring a concept from ideation to a working proof of concept under tight constraints, a skill set we'll carry into every project going forward.

What's next for BlinkIn

We're focused on building a complete second pair of glasses to enable true glasses-to-glasses communication. Beyond that, we plan to refine blink detection accuracy, expand the pattern library, and explore accessibility-focused applications, particularly for individuals with speech or mobility impairments who could benefit from an alternative, hands-free communication channel.

Built With

• esp32