TILLBILLY – Embedded Linux based terminal for digital receipts
POS Terminal for Cryptocurrency and Digital Receipts
We developed TillBilly, a tap-and-go digital receipt and cryptocurrency payment terminal. With TillBilly, customers can instantly receive tax invoices on their mobile phones simply by tapping their existing credit card or a TillBilly card at the point of sale.
No more bulky wallets or boxes filled with paper receipts. Using machine learning, TillBilly automatically categorizes and analyzes transactions, helping users track spending across categories (for example, how much you spent on fuel this month versus last).
And that’s just the beginning. By securely accessing itemized transaction data, TillBilly creates a powerful analytics and promotional platform for retailers, enabling smarter customer segmentation, targeted promotions, and deeper behavioral insights.
Solution
Hardware
SoM OSD3358
5" TFT Display
NFC reader
WiFi module
SOFTWARE
Embedded Linux
ENCLOSURE
Custom design plastic enclosure
TEAM
1x Embedded Engineer
1x Embedded Programmers
1x Backend developer
1x App developer
1 x Enclosure designer
Problem
Our goal was to develop a compact device capable of seamless communication between an NFC card and a remote server, designed primarily to enable cryptocurrency payments.
Beyond its core payment function, the system also aimed to reduce environmental impact by eliminating paper receipts and promoting digital alternatives.
Solution
Through multiple development cycles, we evolved TillBilly from a simple proof of concept into a manufacturable commercial product.
Iteration 1 – Proof of Concept
We began prototyping on a BeagleBone Black platform, validating the communication flow between NFC, server, and display modules.
After hardware validation, we designed a 3D-printed enclosure to present the first working prototype for investor and market feedback.
Iteration 2 – User Experience Enhancements
Based on stakeholder feedback, we introduced several quality-of-life improvements, including a touchscreen interface, refined enclosure design, and improved ergonomics for real-world retail environments.
Iteration 3 – Optimization & Cost Reduction
The final iteration focused on manufacturing readiness, optimizing component layout, reducing costs, and refining the form factor to achieve a device that both looked and felt like a finished product.
Result
The final TillBilly prototype successfully met all design goals and was ready for certification and mass production.
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