Hacking with Claude on a $27 Smart Watch
The brief
The author used Claude via OpenCode to build a custom Casio-style watch face for a PineTime smartwatch in a few hours of iterative AI-assisted firmware work.
Key points
- Static display elements were baked into a fullscreen background image, leaving only dynamic components to render at runtime, which reduced rendering complexity on the constrained device.
- Transfer of the 240x240 image over Bluetooth took roughly 10 minutes and caused 1 to 2 second refresh delays, but the prototype was considered functional and the code was published to GitHub.
Sources
- HNmikekasberg.com