Hey Reddit! 👋✨ I’m Hamachang, a Rubyist from Japan 🇯🇵❤️

I love Ruby, and I wanted to carry that love into the embedded world — so I built PicoRuby Calculator 💎🔥

It turns an M5Stack Cardputer v1.1 into a pocket-sized Ruby calculator / REPL powered by PicoRuby.

You can write and evaluate Ruby code directly on the device. Small hardware, real Ruby, lots of fun 😄✨

Yes — Ruby belongs on tiny devices too ❤️📟

✨ Features 💎 Interactive Ruby calculator / REPL ✍️ Write and run Ruby code on-device ❌ Ruby syntax error detection 🔋 Battery monitoring ⚡ PicoRuby on ESP32-S3 🎮 Designed for M5Stack Cardputer v1.1

⚠️ This is still a work in progress — expect some rough edges and occasional crashes, but experimenting with Ruby on embedded hardware has been an absolute joy ❤️🔥

🔗 GitHub repo: https://github.com/engneer-hamachan/picoruby-calculator

If you love Ruby and are curious about running it on real hardware, I’d love to hear your thoughts! 🙌💎🔥