Chain Encoder

The Chain Encoder is a Chain-series rotary encoder module with direction detection, pulse counting, push-button input and an RGB status LED. It supports UART daisy-chaining via dual HY2.0-4P ports and includes LEGO-compatible mounting holes.

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The Chain Encoder is a rotary encoder input node in the M5Stack Chain series, designed for reliable dial-based control in interactive projects. It includes an internal AB rotary encoder, supporting rotation direction detection and pulse counting, and the centre of the knob also works as a push-button input. A programmable RGB LED is built in for clear status indication and visual feedback.

For more flexible builds, the encoder cap includes LEGO-compatible mounting holes, making it easy to integrate into creative structures or modular enclosures. It’s a good fit for applications such as human–machine interaction, control panels, and smart home control.

The Chain Encoder is powered by an STM32G031G8U6 controller and communicates using a UART serial daisy-chain protocol. With two HY2.0-4P expansion ports, you can connect additional Chain series modules to build more complex and feature-rich interactive systems.

Features

• M5Stack Chain series
• AB rotary encoder
• Button input
• STM32G031G8U6 core controller
• 1 x RGB LED
• LEGO-compatible mounting structure
• Uses UART serial daisy-chain communication protocol
• 2 x HY2.0-4P expansion interfaces for Chain series device expansion

Specifications

MCU	STM32G031G8U6
Input Power	DC 5V
Communication	UART 115200bps@8N1
Interface	2 x HY2.0-4P
RGB LED	1 x WS2812B
RGB On Power	22.51mA
Operating Temp	0 ~ 40°C
Product Size	23.9 x 23.9 x 29.8mm
Product Weight	10.0g

Resources

• Documents

Package Contents

• 1x Chain Encoder
• 1x Chain Bridge