M5Stack Unit ChainBUS STM32G031, UART Daisy-Chain Communication Protocol to Enable Chained Connections of Multiple Devices, Includes 2 x HY2.0-4P Grove Cable (5cm) U212

["STM32G031G8U6 CORE: Built around the STM32G031G8U6 MCU for reliable, efficient processing in compact embedded applications.","DAISY-CHAIN COMMUNICATION: Uses UART daisy-chain protocol at 115200bps (8N1) to link multiple Chain series devices on a single bus with ease.","VERSATILE INTERFACES: Features 2 x HY2.0-4P UART ports for Chain devices and 1 x HY2.0-4P multifunction expansion port for Unit series peripherals.","EXPANSION I/O SUPPORT: Enables I2C communication control, GPIO management with interrupt configuration, ADC sampling, and NVIC interrupt management.","COMPACT & LIGHTWEIGHT: Measures just 1.17 x 0.94 x 0.31 inches and weighs approximately 0.21 oz, ideal for space-constrained IoT and industrial control builds."]