Features: Advanced Chain Bus Connectivity: Features STM32G031G8U6 with Chain Bus/UART supporting 115200bps@8N1 for seamless chain communication between multiple devices. Enhanced systems Reliability: offer device query, version check, link detection, and heartbeat functions to improve systems maintenance and stability. Flexible Expansion option: Equipped with 2 HY2.0 4P UART interfaces and 1 multifunction expansion port for connecting various sensors and peripherals. Visual position Monitoring: Built in WS2812 LED provides clear operational response for easy debugging and real time monitoring. Low Power Efficiency: Supports DZC control, GPIO management, collection, and NVIC interrupts for energy saving applications in and industrial systems. Specifications: Component : plastic Size: about 29.8x24x8mm/1.2x0.95x0.32inch :STM32G031G8U6 interfaces:2 x HY2.0-4P UART Interfaces, 1 x HY2.0-4P Multifunction Expansion interfaces LED:1 x WS2812 Communication:UART 115200bps @ 8N1 Chain :Chain Bus UART -chain communication Chain Features:Device query, version query, link device enumeration, heartbeat, . Package Includes: 1 set Expansion interfaces note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.