Developed ESP32-S3 WROOM device tree support for the nrfconnect/sdk-zephyr repository, focusing on enabling robust board-level configuration within Zephyr. The work involved creating a dedicated device tree source file, esp32s3_wroom_n32r16.dtsi, which defines flash and PSRAM configurations for the ESP32-S3 WROOM module. Leveraging expertise in device tree configuration, embedded systems, and hardware abstraction, the implementation adhered to Zephyr’s conventions to ensure compatibility and maintainability. This contribution established a foundation for broader ESP32-S3 hardware support, facilitating smoother integration of ESP32-based platforms in Zephyr and supporting future board support package development within the repository’s ecosystem.