Developed OpenWrt support for the ASUS RT-AC85U router in the DragonBluep/openwrt repository, focusing on expanding device compatibility within embedded systems. The work involved creating device tree source files, documenting hardware specifications, and updating the platform upgrade script to automate recognition and deployment for the new device. Leveraging expertise in device driver and firmware development using C and Shell, the developer implemented a complete installation and flash workflow, including ASUS Recovery mode, static IP configuration, initramfs transfer, and sysupgrade. This contribution streamlined user onboarding and reduced manual setup, while adhering to OpenWrt’s upstream contribution standards through a properly submitted patch.