What is JMRI?
The JMRI project is building tools for model railroad computer control.
We want it to be usable to as many people as possible,
so we're building it in Java to run anywhere,
and we're trying to make it independent of specific hardware systems.
JMRI is intended as a jumping-off point for hobbyists
who want to control their layouts with a computer
without having to create an entire system from scratch.
You can manage your locomotive rosters and easily program your decoders using
DecoderPro®.
You can build control panels and control your layout using
PanelPro™ to set up signaling and other functions.
OperationsPro™
lets you create manifests that route cars across your railroad from shipper to receiver,
and provide train crews with operating instructions.
Going beyond the basics, you can use Logix to
automate your layout's behavior, interface with X10 and Insteon systems to control your
layout room's lights
and write
scripts to extend the capabilities
of the system.
As an open source project, JMRI is evolving in many directions at once. You can get
involved at as many levels:
- Learn about JMRI:
- Kick the tires:
- Share your experiences:
- Help extend and develop the program code:
- Make a small donation to help defray the costs of keeping JMRI
going.
Donate...
Whatever it is that you choose to do with JMRI, and however you get involved,
welcome to our community!
Download 5.8
Released on June 24, 2024.
JMRI 5.8 is recommended for new users. It is the most
recent stable production release.
For more information, see the
JMRI 5.8 Release Note,
which also contains the download links.
Released on October 11, 2024.
This is the next in a series working toward the next JMRI production release 5.10
probably in December 2024.
For more information on this test release, please read the
JMRI 5.9.5 Release Note,
which also contains the download links.
Release 5.8 is the current "production" release, recommended
for first-time users.
Released on December 22, 2021.
JMRI 4.26 is recommended for JMRI users with computers
that can only run Java 8; later releases require Java 11 or later.
For more information, see the
JMRI 4.26 Release Note,
which also contains the download links.
Released on January 11, 2015.
JMRI 3.10.1 is recommended for JMRI users with computers
that can only run Java 1.6.
For more information, see the
JMRI 3.10.1 Release Note,
which also contains the download links.
Released on July 15, 2012.
JMRI 2.14.1 is recommended for JMRI users with computers
that can only run Java 1.5.
For more information, see the
JMRI 2.14.1 Release Note,
which also contains the download links.
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JMRI is celebrating its 25th birthday! It first started to come together in October of 1999. It's come a long way since!
We're also celebrating the 10,000
contributed update
to the JMRI source code. Thanks to
all the people who've worked on JMRI over the years.
For more information, see
here.
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Tim Mann has created "Model Railroad Switch List and Manifest Formatter (MR SLAM Formatter)"
as an additional way to create custom railroad paperwork from JMRI information.
For more info, see our Community Connections page
or go directly to
the program's website
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There's a new series of introductory "How To" explanations for JMRI Operations.
These provide step-by-step instructions for doing the first things needed to get started with Operations.
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Several users have contributed their clinics for our
Clinics page. There are both conventional handout
and slides clinics, and also some neat interactive clinics for DecoderPro®
and PanelPro™.
Some JMRI clinics from past NMRA national and other conventions are also included.
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Hobbyists have created applications that work with JMRI
to provide extra capabilities. In addition, some commercial vendors have
created applications that work with, add data to, or take data from JMRI.
See the
community/connections directory for a list and links.
New applications can be added at any time!
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You can use your iPhone, iPad or Android phone as a throttle with JMRI.
After you download
and install a program onto your phone, you can connect it
wirelessly to your computer running JMRI, which in turn will run your layout.
Imagine friends visiting your layout and running trains from their mobile device,
without having to bring throttles.
For more information, see the
feature page.
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You can control your layout directly from your computer, smartphone or tablet, without the need
to download and install any application.
The current web browsers running on these devices are able to manage the resources and features needed to replace physical throttles.
Just start the JMRI Web Server on your JMRI computer, open http://<your JMRI server>/web/webThrottle.html and enjoy it.
For more information, please visit the
webThrottle - Web control for locos, panels, turnouts and routes page.
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The Raspberry Pi is becoming increasingly popular as a small and cheap computer.
JMRI will operate under the Raspbian operating system (Debian version of Linux).
Follow the installation instructions..
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The JMRI applications have a built-in help system. It has lots of information, including
overviews and window-specific information. The pages are simple HTML, and users are
encouraged to
add missing information.
The Help information is available online via either the
Index or
Table of Contents.
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Our "Decoder ID" pages provide easy access to all sorts of information
about decoders.
They are automatically created from the current DecoderPro definitions.
Contribute more information to our decoder definitions, and help these pages become even more useful!
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JMRI is an informal open-source software group.
We do this for the joy of model railroading, and don't produce anything for profit.
One of our members has spent four years in the Federal Courts
defending our right to continue
against an individual who has attacked us with
bogus patent threats, cybersquatting, copyright infringement and other illegal acts.
We are extremely pleased to announce that this case has been
settled.
The agreement ends the dispute, and gives everybody involved a way to move forward.
This is a victory for JMRI and open-source software in general.
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Sun Microsystems (since 2010 part
of Oracle)
has awarded JMRI a
2006 Duke's Choice award.
Also called a "Dukie", this award is given
annually to "some of the most clever, practical, and inspirational Java technology applications on the planet".
The award was presented at the
annual JavaOne conference on May 14th by James Gosling.
JMRI won for its community, its use of Java technology to empower people all over the world to contribute,
and for the impact it's had.
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