German Rheinmetall open-sources its Battlesuite connected weapon system protocol

German defense contractor Rheinmetall has officially open-sourced the documentation for its OnboardAPI, a core component of its Battlesuite connected weapon system. The release, hosted on GitHub, provides technical specifications for the protocol used to integrate various sensors, communication devices, and weapon systems into a unified digital architecture. By making this documentation public, Rheinmetall aims to standardize interoperability across military hardware, allowing third-party developers and partner nations to better integrate their own systems with the company's combat management suite. The move represents a significant shift toward transparency in the defense sector, where proprietary protocols have historically dominated. The documentation covers version 9.10.0, detailing the data structures and communication standards required for seamless battlefield connectivity. This initiative is expected to foster a more modular approach to defense technology, enabling faster deployment of updates and broader compatibility across diverse military platforms.