velxio

Is this what you want? https://docs.espressif.com/projects/esp-idf/en/stable/esp32/... Also: - https://wokwi.com/ - https://github.com/davidmonterocrespo24/velxio

Quick update: traffic is still coming in waves, had to scale up compilation workers to keep up with demand Things are more stable now, but still tuning performance under load If anyone finds it useful, the source is here: https://github.com/davidmonterocrespo24/velxio Always happy to get feedback or contributions.

Hey HN, I posted Velxio here a while back and got great feedback. Since then I've shipped a major update What's new in v2: - 19 boards across 5 CPU architectures (AVR8, Xtensa, RISC-V, ARM Cortex-M0+, ARM Cortex-A53) - ESP32 emulation via QEMU (lcgamboa fork) — real flash images, ROM function emulation, GPIO/ADC/timers - ESP32-C3 and CH32V003 run on a custom RISC-V core written in TypeScript, entirely in the browser - Raspberry Pi 3B via QEMU raspi3b — boots real Pi OS, runs Python - Realistic sensor simulation: DHT22 (40-bit protocol timing), HC-SR04 (trigger/echo), WS2812B NeoPixel (GRB decoding) - 48+ electronic components from wokwi-elements Architecture: - AVR, RP2040, and RISC-V emulation runs client-side (avr8js, rp2040js, custom TS core) - ESP32 Xtensa and Pi 3 run on backend QEMU - Compilation via real arduino-cli - React + Vite

I built a small emulator project called Velxio. A fully local, open-source Arduino emulator. Write Arduino code, compile it, and simulate it with real AVR8 CPU emulation and 48+ interactive electronic components,All running in your browser. GitHub: https://github.com/davidmonterocrespo24/velxio The goal of this project was to learn more about how emulators work internally: CPU instructions, memory management, and low-level architecture. It's still experimental, but it already runs basic instructions and I'm continuing to improve it.