The expansion board offers extensive expansion options with support for a wide range of connections, enabling easy customization and individual development efforts. It features multifunctional interfaces including GPIO, UART, and I2C, making it convenient to connect and control different peripherals. A sturdy design provides reliable performance for long-term use across varied technical application scenarios. The improved version delivers enhanced stability and greater capability, suitable for diverse application environments. Use scenarios: - Prototyping and development: connect sensors and peripherals via GPIO, UART, and I2C for rapid testing and iterative design. - Long-term deployment and testing: robust construction supports stable operation in extended runs and demanding environments. - Education and DIY projects: ideal for learning electronics and expanding a development kit with versatile connections.