Fintech · Hardware
Lemon Box.
A desk device with a 4-inch touchscreen, designed and built for Lemon, the Argentine fintech, as a redeemable object in its rewards program. It shows the live crypto market, with our own firmware and cloud.
- Result
- Physical product delivered to Lemon, with our own firmware and cloud.
- Time
- Delivered
- Built with
- ESP32-S3, C++, Node.js, Puppeteer, WebSocket, Railway
How the project went
Why they called us
Lemon wanted a physical, branded object for its rewards program: something users could redeem and keep on their desk.
The problem they had
A physical product means solving hardware, firmware, enclosure, connectivity and content at once, and the end user has to set it up alone, with no technical support.
How we solved it
We picked a 480×480 MaTouch ESP32-S3 touchscreen, wrote the firmware and built a cloud that renders the web interface and streams it to the device frame by frame.
Technical approach
C++ firmware with Wi-Fi provisioning, WebSocket and JPEG decoding; a Node.js server with Puppeteer that captures the interface when it changes and sends the device's touch events back to the browser.
Impact
Product delivered to Lemon with its branding, ready to redeem. Lemon Box was the first Ferced Box, our made-to-measure line. On that same hardware base we later built NerdCube, our desk companion.
How long it took
Delivered. The project covered product design, firmware, cloud and the printed enclosure.
What we needed from the client
Branding, deciding what the screen shows and validating the end-user experience.
Process friction
Medium: hardware, firmware and cloud had to close at the same time, and every iteration was tested on the real device.