During November 2025, Marko Draca extended the esphome/esphome repository by implementing differential mode support for the MCP3204 ADC, enabling users to select differential input pairs for more accurate voltage measurements in embedded systems. He updated the read_data logic and sensor configuration using C++ and Python, ensuring seamless integration of the new feature. Marko also contributed comprehensive documentation to esphome/esphome-docs, clarifying configuration variables and usage for both MCP3204 and MCP3208 components. His work demonstrated depth in sensor integration and technical writing, delivering a cohesive feature and documentation package that improved user experience and reduced support requirements without introducing new bugs.