Developed and integrated support for the Good Display 4.2-inch GDEY042T81 e-paper display within the Fmstrat/esphome repository, focusing on expanding hardware compatibility for embedded systems. The work involved creating a complete driver in C++ and Python, defining the display model, implementing initialization routines, and supporting both full and partial update modes. Deep sleep functionality was added to enhance energy efficiency, and the display was incorporated into the configuration framework to streamline user setup and maintenance. This contribution broadened ESPHome’s hardware ecosystem, enabling robust e-paper display projects and positioning the platform for future hardware integrations and power-conscious applications.