JMRI

JMRI (Java Model Railroad Interface) is an application designed to control and manage model railroad systems. The tool supports multiple protocols and devices, making it easier to operate model layouts through digital interfaces.

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• Locomotive control. JMRI lets you operate digital locomotives through DCC, LocoNet, and other protocols. It includes adjustments for speed, direction, and auxiliary functions such as lights and sounds.
• Decoder configuration. The tool offers advanced options for programming DCC decoders and their CV (configuration variable) settings. It lets you read and write decoder values to customize their behavior.
• Signal management. JMRI controls both automatic and manual railway signals. It integrates with sensors and actuators to simulate realistic operations.
• Route automation. The software lets you create sequences of predefined routes. Trains can follow automatic paths based on programmed conditions.
• Customizable control panels. JMRI includes tools for designing graphical control panels. Users can drag and drop elements to create interfaces tailored to their needs.
• Operations simulation. The application simulates railroad schedules and operations. Events can be programmed based on real time or specific conditions.
• Communication with external hardware. JMRI supports connections with interfaces such as NCE, Digitrax, and Lenz. It allows integration with physical control systems.
• Data logging and analysis. The tool saves activity logs so you can review operations. The data can be exported for later analysis.
• Scripting support. JMRI supports automation through scripts in Python (Jython) and other languages. Users can extend functionality with custom code.
• Sensor management. The software monitors occupancy sensors and other detection devices. It provides real-time feedback on the state of the layout.
• Support for multiple formats. JMRI works with XML, JSON, and other standard formats for importing and exporting configurations.

JMRI was created in 1997 by a group of model railroad enthusiasts. The project emerged as an open-source alternative for controlling digital systems. It is written primarily in Java, which allows it to run on multiple platforms. The lead developers include Bob Jacobsen and other active contributors from the model railroading community. The application has evolved over time, adding new features and support for additional hardware.

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