Improved board The upgraded board offers stable operation and strong performance across a range of application scenarios. Multifunction interfaces Supports GPIO, UART, and I2C, enabling easy connection and control of diverse peripherals. Expansion board features Rich expansion options provide many connection possibilities for easy customization and development. ATTINY88 chip Equipped with an ATTINY88 chip delivering robust processing power and broad interface resources. Use scenarios IoT sensor node and data logger: connect sensors and modules via the supported interfaces to collect and manage data. Prototyping and education: ideal for rapid hardware iterations and learning embedded systems with flexible connectivity. Small form robotics and automation: serves as a compact central controller for hobby robotics and automation projects.