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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 architectu
by dmcrespo 7mo ago
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 frontend, FastAPI backend
- Self-hostable via Docker, no account needed
Source: https://github.com/davidmonterocrespo24/velxio https://github.com/davidmonterocrespo24/velxio (AGPLv3)
Happy to discuss the emulation architecture — particularly the trade-offs between in-browser vs. backend QEMU emulation
- philkrylov 7mo agoHi, adding WS2812B LED strips of arbitrary length would be awesome! Scrolling the canvas is sometimes problematic. Otherwise very interesting.
- dmcrespo 7mo agoThanks! That’s a great suggestion, supporting WS2812B strips with arbitrary length is definitely something I’d like to add. I also have in mind adding many more LED based components. I’ll take a look at improving the canvas scrolling too
- ehnto 7mo agoWhen I try to visit velxio.dev, a CrowdSec page shows up and says I am not allowed to view it. I am a pretty normal android user on firefox mobile, so that is surprising. I look forward to trying this out though, great project!
- dmcrespo 7mo agoOh, thanks for reporting this.that definitely shouldn’t happen. It’s likely an overly aggressive CrowdSec rule blocking some legitimate traffic. I’ll look into it and adjust the configuration
- dmcrespo 7mo agoQuick update: this should be fixed now. It was an overly aggressive CrowdSec rule blocking some legitimate traffic. If anyone still has issues accessing velxio.dev, let me know
- ehnto 7mo agoNice one! I can access it now. Really awesome project, it runs well on my old android phone, the fact that I can use a tool like this on my phone is pretty wild, you have done well with the UI in that regard. The oscilloscope is a really nice feature too.
- dmcrespo 7mo agoMobile support is something I’ve been paying a lot of attention to, so it's really good to know it runs well even on older devices. And glad you liked the oscilloscope, that was a fun one to build.You can select the motherboard and ping you want to monitor.