THE CHALLENGE
Traditionally, agricultural vehicles relied on multiple discrete lamps to meet lighting requirements, with separate hardware units for each function. This approach increased wiring complexity, consumed valuable physical space, and raised both manufacturing and maintenance overhead.
As vehicle platforms evolved, the need emerged for a more compact, flexible solution that could reduce hardware complexity while meeting stringent functional safety requirements.
THE SOLUTION
We addressed this challenge by consolidating multiple lighting functions into a single, configurable unit, significantly simplifying vehicle integration and reducing overall hardware complexity.
Drawing on our expertise in functional safety — from hazard analysis through to validation — we supported the development of a solution fully compliant with ISO 25119 while streamlining the engineering process.
CI/CD pipelines and automated testing were introduced to accelerate development cycles, improve early defect detection, and enhance long-term maintainability. Close collaboration between multidisciplinary teams across hardware, software, and safety domains enabled seamless system integration.
The system architecture and software were designed with reuse and adaptability in mind, allowing the solution to support multiple lighting configurations and deliver long-term value for the customer.
THE RESULTS
The final solution is a streamlined, modular lighting system that integrates multiple functions into a single, compact unit. It reduces hardware footprint, simplifies vehicle assembly, and improves diagnostics and maintenance, while maintaining high safety and reliability standards.
TECHNICAL HIGHLIGHTS
The solution is built around a single PCB featuring a microcontroller that manages multiple LED groups, supporting Direction Indicator, Front Position Light, Side Marker Light, and Flash Warning Light configurations within a compact hardware footprint. Communication is handled via the LIN 2.2 protocol, operating as a slave device to ensure seamless compatibility with standard vehicle ECUs.
The system was developed to meet AgPLr A and SRL B safety levels under ISO 25119. Its modular software architecture covers LIN communication, LED control, diagnostics, and fault handling, and supports variant detection at boot time, enabling reuse across different lighting configurations.
A comprehensive safety case was produced, including hazard analysis, risk classification, mitigation strategies, and clearly defined safe states for fault scenarios such as LIN communication loss or LED failure. To support traceability and compliance, an automated toolchain based on CI/CD pipelines was implemented, integrating static analysis, automated testing, and compliance artefact generation. The project achieved full ISO 25119 compliance through rigorous documentation and structured review cycles.