Developed and integrated support for the Longdata APS256 device within the coolsnowwolf/immortalwrt repository, focusing on expanding hardware compatibility for the ATH79 platform. The work involved creating a new device tree in C, configuring LEDs, buttons, and network interfaces, and defining device-specific switch settings. The developer also established dedicated image build definitions to ensure seamless integration into existing build pipelines. By documenting all changes in a single, traceable commit, the approach emphasized clarity and maintainability. This contribution leveraged expertise in embedded systems, Linux kernel development, and networking to enable broader device support and facilitate future hardware onboarding.