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automation

Velxio: Test IoT Code

Write and run code on 19 boards without hardware. For founders working with Arduino, ESP32, and Raspberry Pi, backed by 2.1k+ GitHub stars.
intermediate⏱ 30 minutes💵 Free
2,366 stars243 forksTypeScriptQuality 9/10Updated 7/18/2026100% free · open source
What it is

Write and run code on 19 boards without needing any real hardware.

What you can make with it

Automations for IoT projects, like simulating a weather station for a prototype, without investing in hardware costs.

How it helps

This helps creators and founders save time and money by letting them experiment and test IoT code in a virtual environment.

Real use case example

"A founder who wants to build a smart home system can use Velxio: Test IoT Code to write and run code for different boards, like Arduino and ESP32, without needing any real hardware. They can then simulate various scenarios, like lighting control and temperature monitoring, to ensure their system works as expected."

If you're new

When trying to understand basics of IoT development and how to simulate real-world scenarios.

If you're senior

When looking for a free and cost-effective alternative for testing and experimenting with IoT code before investing in physical hardware.

Common confusion cleared up

This skill can run code on 19 real boards in the cloud, but it doesn't imply the user has real hardware, only a virtual environment for testing code.

Best inside these AI tools
Claude DesktopCursorCodex CLI
Pairs with
Arduino IDEESP32 IDENotion databaseDiscord
Why we list it on WorkflowStacks: It's included in this marketplace of AI tools because it's free and open-source, providing a cost-effective alternative to paid simulators.
What it does

Velxio allows you to write, compile, and run code for various microcontroller boards like Arduino, ESP32, and Raspberry Pi directly in your browser without needing the physical hardware

When to use it
  • •When testing and debugging code for IoT or automation projects without wanting to set up the physical hardware
  • •When learning or teaching programming for microcontrollers without the need for actual devices
  • •When rapidly prototyping or validating code ideas for embedded systems projects
Quick start
  1. 1Visit the Velxio website and select the board you want to emulate from the 19 available options
  2. 2Write or paste your code into the Velxio editor, using languages like TypeScript for automation tasks
  3. 3Compile and run your code to see how it would behave on the actual hardware, all within the browser
  4. 4Join the Velxio Discord community for support and to share your projects with others
Ready-to-paste prompt
Let's try a basic blinking LED example for Arduino Uno: `const int ledPin = 13; void setup() { pinMode(ledPin, OUTPUT); } void loop() { digitalWrite(ledPin, HIGH); delay(1000); digitalWrite(ledPin, LOW); delay(1000); }`
Saves to your device

Topics

arduino
esp32
simulation
velxio
wokwi
What's inside — free to inspect
No purchase needed

Read the entire source before you build — unlike paid marketplaces that hide it behind a buy button.

15
top-level files
10
folders
228.7M
repo size
Other
license
Key files
package.json
README.md
File tree
.github/
.vite/
backend/
docker/
docs/
frontend/
prebuilt/
scripts/
test/
vscode-extension/
.dockerignore
.gitignore
.gitmodules
.markdownlint.json
CHANGELOG.md
CLAUDE.md
COMMERCIAL_LICENSE.md
docker-compose.yml
Dockerfile.espidf-toolchain
Dockerfile.standalone
LICENSE
make-test.js
package.json
pytest.ini
Quick Actions
Details
Creator
davidmonterocrespo24
Language
TypeScript
Category
automation
Published
3/3/2026

Are you the creator of this tool? Claim your listing → and earn 85% of every sale.

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