SMRTR ProgrammingJun 21, 2026Hacker News

We Taught a $3 Chip to Run CSS

SMRTR summary

gea is a framework that lets developers build UIs for tiny microcontrollers using TSX components and plain CSS, compiled down to native C++. Running on a $5 ESP32-S3, it renders a 3D animated cube at 42 fps by compiling CSS to typed structs at build time, using a retained display list, dirty-region tracking, and a fast transform reproject path to stay memory-efficient.

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