Tech Hub/JMRI

JMRI Software Guides

Control your model railroad from your computer. JMRI is free, open-source software for decoder programming, layout panels, and operations.

Download JMRI from jmri.org

Setup

beginner15 min read

Getting Started with JMRI

Complete beginner's guide to installing and configuring JMRI for your model railroad.

InstallationHardware SetupFirst Connection

Programming

beginner12 min read

Programming Decoders with DecoderPro

Master CV programming using JMRI's DecoderPro for locomotives and accessories.

CV ProgrammingDecoder SelectionSpeed Tables

Panels

intermediate18 min read

Building Control Panels in PanelPro

Create virtual control panels for turnouts, signals, and layout monitoring.

Panel CreationTurnout ControlSignal Logic

Operations

intermediate20 min read

JMRI Operations: Car Routing and Switchlists

Set up realistic operations with computer-generated car routing and switchlists.

Car RosterLocation SetupTrain Building

Automation

advanced25 min read

Automation with Logix and Signal Mast Logic

Create automated signals, routes, and complex layout behaviors using JMRI's logic systems.

Logix BasicsConditionalsSignal Mast Logic

Throttles

beginner10 min read

Using WiFi Throttles with JMRI

Control trains from your phone or tablet using JMRI's WiThrottle server.

WiThrottle ServerPhone AppsMultiple Throttles

Installation

intermediate15 min read

Running JMRI on Raspberry Pi

Set up a dedicated JMRI server on Raspberry Pi for always-on layout control.

Raspberry Pi SetupLinux InstallationHeadless Operation

Scripting

advanced12 min read

JMRI and Arduino Integration

Connect Arduino-based accessories to JMRI using CMRI or direct serial communication.

CMRI ProtocolSerial CommunicationSensor Integration

Quick Start

Download JMRI

Get the installer from jmri.org

Connect Hardware

USB cable to your command station

Configure Connection

Select your DCC system in preferences

Start Programming

Read and write decoder CVs

Related Resources

Decoder Wizard

Find compatible decoders

DCC Calculator

Power requirements

Arduino Projects

Custom electronics

Wiring Diagrams

DCC bus and feeders