> ## Documentation Index
> Fetch the complete documentation index at: https://docs.shortrange.tech/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction to OpenDoorSim

> OpenDoorSim is your very own RFID Lab! Plug in a reader and go. Scan. Decode. Research. Practice. Demo. Any wiegand or (soon) OSDP reader!

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## What is OpenDoorSim?

OpenDoorSim (ODS) is a personal, open-source RFID lab designed for ease of use and wide compatibility. It simulates Physical Access Control Systems (PACS) by connecting to real readers, so you can hack (or defend) the real thing!

All iterations of OpenDoorSim are based on the same ODS board.

With ODS, at-home experiments, big CTFs, hands-on workshops, banger demos and advanced research are a breeze. It works with any Wiegand or (soon) OSDP reader, and fits easily in your bag. Sporting a fresh web UI with a mirrored virtual display, an on-device hardware menu, and multiple modes to make life easy, you may find it hard to put down...

## Key Features

<CardGroup cols={2}>
  <Card title="Easy To Use" icon="rocket-launch">
    The world's friendliest RFID lab is a breeze to use — run CTFs, demos, research, workshops, and more via hardware or web interfaces! All you need to start is the board!
  </Card>

  <Card title="Multi Mode" icon="magnifying-glass-waveform">
    Investigate binary messages in RAW mode. Or, switch to USER mode to manage, grant and deny access to specific credentials. Want to go stealth? We've got settings for that too.
  </Card>

  <Card title="Open Hardware Design" icon="screwdriver-wrench">
    Schematics, 3D Print STLs, Gerbers, and more released under open licenses. Fabricate, modify, and iterate to your heart's content. Create your own modules for the integrated module slots!
  </Card>

  <Card title="Open Source Software" icon="code">
    Created and maintained by a worldwide community. We are always looking to improve and develop the project. Updates, issues, and feature requests happen all on GitHub.
  </Card>

  <Card title="Modular Assembly" icon="cubes">
    Frame, electronics, and software are decoupled layers.  Upgrade or replace without rebuilding the whole rig. Parts are easy to source — either buy off the shelf or manufacture them yourself!
  </Card>

  <Card title="Community Driven" icon="heart">
    There are tons of ways to support the project and community — build your own ODS board, run a CTF, contribute features, tell your friends, or buy an official supporter kit!
  </Card>
</CardGroup>

## Who It's For

OpenDoorSim is built for anyone who needs an RFID / PACS lab:

* **Vulnerability Researchers** who want a quick and easy way to set up, research, and demo their findings.
* **Students** looking to learn about RFID, card and reader vulnerabilities, and physical security.
* **CTF Organizers** who want a turnkey, interactive solution for RFID / PACS challenges.
* **Industry Professionals** who want to test equipment, validate configurations, and demo their RFID cards and readers, .
* **Hobbyists & Makers** who want a satisfying weekend build that interacts with real world RFID hardware.

If you can turn a screwdriver, use a soldering iron, and run a terminal, you have everything you need to get started.

***