SOVD Integration with Danfoss API : A C++ Prototype for Standardized Vehicle Diagnostics

This thesis explores how the ASAM SOVD standard can be integrated with the proprietary PLUS+1 API used by Danfoss Power Solutions AB. The goal is to improve interoperability by creating a translator that maps SOVD requests to PLUS+1 API calls. A C++ proof-of-concept localhost server was developed and tested with both simulated and real hardware. The implementation focuses on read-only diagnostic data and supports a key subset of SOVD endpoints. Results show that standardized diagnostics can be layered over existing systems without major changes, offering a practical path toward future-ready diagnostic tools. Keywords: ASAM SOVD, PLUS+1 API, vehicle diagnostics, embedded systems, C++ implementation, RESTful API, interoperability, standardization, diagnostic data, proof-of-concept