The ECU rejected the execution because vehicle states are unsafe (e.g., trying to calibrate a sensor while the engine is running).
Light, micro-controller-agnostic C libraries designed to fit into standard automotive MCUs (e.g., STM32, Aurix, or ESP32). They feature small memory footprints and provide a clean API to hook your application logic directly to DIDs and Routines. Iso 14229-1 Pdf Github
This is perhaps the most popular Python implementation of UDS. The documentation for this library is effectively a "practical" version of the ISO 14229-1 standard, explaining exactly how to format requests. The ECU rejected the execution because vehicle states