FAQ
Do I need to install anything?
Section titled “Do I need to install anything?”No. Velxio runs entirely in the browser — the editor, the compiler (in the cloud) and the simulation. A recent Chrome, Edge or Firefox on a desktop is the best experience.
Is it really running my code?
Section titled “Is it really running my code?”Yes. Your sketch is compiled by the same toolchains the real boards use (arduino-cli, ESP-IDF, MicroPython), and the resulting real binary is executed by an emulated CPU — not a line-by-line interpretation of your source. Boot logs, timing quirks, register behavior: what you see is what the silicon would do.
Is Velxio free?
Section titled “Is Velxio free?”The core simulator is free, including the open board catalog and the examples gallery. Pro boards, the AI assistant and private projects need a paid plan — see plans.
Can I import my Wokwi projects?
Section titled “Can I import my Wokwi projects?”Yes — the open project button accepts Wokwi .zip archives alongside
Velxio’s own .vlx files. See
Saving and opening projects.
Which boards are supported?
Section titled “Which boards are supported?”Arduino UNO/Nano/Mega, the ESP32 family (classic, S3, C3), Raspberry Pi Pico and Pico W, STM32, full Linux Raspberry Pi, ATtiny85 and more — the complete list with details is in Boards.
Does WiFi work in the simulator?
Section titled “Does WiFi work in the simulator?”On ESP32 boards, yes — the simulated station associates, gets an IP over DHCP and can reach the internet gateway for MQTT/HTTP projects. See WiFi & IoT.
Can I get my project onto real hardware?
Section titled “Can I get my project onto real hardware?”Yes. For ESP32 projects, web flash writes the compiled firmware to a real board over USB, straight from the browser. See Web flash.
Where do I report a bug or ask for a feature?
Section titled “Where do I report a bug or ask for a feature?”Through the Help menu in the editor, the Velxio Discord community, or the GitHub organization — whichever you prefer.