# Velxio: An open-source browser-based simulator for ESP32 and other embedded boards

DevFeed: [Velxio: An open-source browser-based simulator for ESP32 and other embedded boards](<https://devfeed.tech/articles/velxio-browser-based-esp32-simulation-that-runs-on-real-hardware-powered-by-ai-agents-13785.md>)

Original publisher: [Read original article](<https://developer.espressif.com/blog/2026/07/velxio-browser-based-esp32-simulation/>)

Author: John Lee

Published: 2026-07-31T00:00:00Z

Content type: article

Language: en

Sources: [Blog on Developer Portal](<https://devfeed.tech/sources/blog-on-developer-portal.md>)

Topics: [ESP32](<https://devfeed.tech/topics/esp32.md>), [Simulation](<https://devfeed.tech/topics/simulation.md>), [Open Source](<https://devfeed.tech/topics/open-source.md>), [Web app](<https://devfeed.tech/topics/webapp.md>), [browser](<https://devfeed.tech/topics/browser.md>), [AI Agent](<https://devfeed.tech/topics/ai-agent.md>)

Tags: [ai](<https://devfeed.tech/tags/ai.md>), [arduino](<https://devfeed.tech/tags/arduino.md>), [article](<https://devfeed.tech/tags/article.md>), [blog](<https://devfeed.tech/tags/blog.md>), [browser](<https://devfeed.tech/tags/browser.md>), [education](<https://devfeed.tech/tags/education.md>), [esp32](<https://devfeed.tech/tags/esp32.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [projects](<https://devfeed.tech/tags/projects.md>), [simulation](<https://devfeed.tech/tags/simulation.md>), [web-app](<https://devfeed.tech/tags/web-app.md>)

## AI overview

The article introduces Velxio, an open-source browser-based simulator for embedded projects. It describes real firmware execution on emulated hardware, support for multiple boards and components, analog and digital co-simulation, development workflows, and self-hosting.

## Source excerpt

This article introduces Velxio, an open-source, browser-based embedded simulator that runs real ESP32 firmware on emulated hardware. It explains how the simulator works under the hood, demonstrates LED, Wi-Fi, MQTT, and sensor based projects, and highlights support for multiple boards across the ESP32 family.