Getting Started with JMRI

JMRI (Java Model Railroad Interface) is free, open-source software that connects your computer to your model railroad. It works with virtually all DCC systems and provides powerful tools for operations.

What You'll Need

• **Computer:** Windows, Mac, or Linux
• **DCC System:** With computer interface capability
• **Interface Cable:** USB or serial connection to your command station

Installation

1. Download JMRI from jmri.org
2. Run the installer for your operating system
3. Accept the license agreement and default options
4. Launch DecoderPro (the main application)

First Connection

1. Go to Edit → Preferences
2. Select your DCC system manufacturer
3. Choose your interface type (USB, serial)
4. Select the correct COM port
5. Click Save and restart JMRI

Testing the Connection

1. Place a DCC locomotive on powered track
2. In DecoderPro, click "New Loco"
3. Enter the locomotive address
4. Use the throttle to test control

Core Applications

• **DecoderPro:** Program DCC decoders
• **PanelPro:** Create control panels and CTC displays
• **Operations:** Manage car routing and switchlists
• **SoundPro:** Configure sound decoders

Next Steps

Once connected, explore decoder programming, build a virtual throttle, or create your first control panel.