Worked on the nrfconnect/sdk-zephyr repository to expand hardware support for the Seeed Xiao NRF54L15 board by enabling IEEE 802.15.4 wireless communication. Updated the device tree configuration to designate the flash controller as rram_controller and activate wireless mesh capabilities, facilitating low-power IoT applications. Leveraged expertise in embedded systems, wireless communication, and C to ensure seamless integration with the Zephyr and Nordic stacks. Consolidated all changes into a single, traceable commit to streamline code review and audit processes. This work improved hardware compatibility and reduced development time for applications requiring reliable 802.15.4 connectivity on the Seeed platform.