Pedro worked on enhancing GNSS driver functionality in the nrfconnect/sdk-zephyr repository, focusing on multi-instance reliability and maintainability for embedded systems. He introduced node-id based callback macros in C, allowing each GNSS device-tree node to have uniquely identified callbacks, which enabled safe reuse across multiple GNSS instances. This approach addressed naming collisions in the U-blox F9P driver, particularly for RTK data handling, by ensuring callback definitions included node identifiers. Pedro’s work improved the scalability of GNSS driver integration with minimal code disruption, demonstrating depth in device driver development and embedded C programming while solving practical challenges in complex hardware environments.