WEDNESDAY, SEPTEMBER 16, 2026|No. 15264
Defense Technology · Open Source

Rheinmetall Releases Open-Source Protocol for Connected Weapon Systems

German defense contractor Rheinmetall has open-sourced the onboard API protocol for its Battlesuite connected weapon system, aiming to enhance interoperability and facilitate developer integration.

A digital representation of a connected weapon system's network interface.
A digital representation of a connected weapon system's network interface. · Photo by Joel Rivera-Camacho on Unsplash
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The onboardapi interface library and middleware is designed for seamless communication between sensor systems and software components. It provides a standardized data model that ensures interoperability across complex hardware and software environments.

Built on the ddkit software development kit, this library utilizes the Data Distribution Service (DDS) standard by the Object Management Group (OMG). This data-centric publish-subscribe architecture guarantees reliable, low-latency data exchange for high-demand applications.

By leveraging DDS XTypes and XCDR2 encoding, this library ensures full backward compatibility. This allows different versions of your software to coexist and communicate seamlessly, even as the data model evolves.

While the core library is provided in C++, the API supports multi-language integration via wrappers for Java, C# / .NET, and Python.

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