The Chain Encoder is a rotary encoder input node in the M5Stack Chain series. It integrates an AB rotary encoder, supporting rotation direction detection and pulse counting. The knob center supports button input. It also integrates a programmable RGB LED for status indication and interactive display. The encoder cap features a for LEGO-compatible hole structure, enabling more creative structural connections. Suitable for human-computer interaction, smart home control, and other applications. The Chain Encoder integrates the STM32G031G8U6 core controller and adopts the UART serial port cascading communication protocol. Through two HY2.0-4P expansion interfaces, it can expand to more Chain series devices and build richer interactive applications. Specifications: MCU: STM32G031G8U6 Input Power: DC 5V Communication Method: UART 115200bps@8N1 Interface Specifications: 2x HY2.0-4P RGB LED: 1x WS2812B RGB Power Consumption: 22.51mA Operating Temperature: 0~40°C Color: As Shown Material: plastic Package Contents: 1 * Chain Encoder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.