M5Stack Chain Encoder Rotary Encoder with STM32G031 and Button Function

The M5Stack Chain Encoder is a rotary encoder input module from the Chain series with an integrated STM32G031G8U6 microcontroller. The AB rotary encoder detects rotation direction and pulse counting and also features a button function by pressing the knob. A programmable RGB LED (WS2812B) allows for status displays and interactive feedback. The cap of the encoder features building block-compatible mounting holes for creative structural connections. The module communicates via a UART serial cascading protocol at 115200 bps and can be connected to other Chain devices through two HY2.0-4P expansion interfaces. The included Chain Bridge Connector enables easy integration into existing Chain systems. With a power consumption of 22.51 mA with the RGB LED activated and an operating temperature of 0 to 40°C, the Chain Encoder is suitable for human-machine interaction and smart home controls.

Recommended accessories:

• M5Stack Chain Dual Key with ESP32-S3 or other M5Stack Cores
• M5Stack Grove Cable

Features:

• AB rotary encoder with direction detection and pulse counting for precise input
• Integrated button function by pressing the knob for additional interaction
• STM32G031G8U6 microcontroller for reliable signal processing
• Programmable WS2812B RGB LED for status display and visual feedback
• Building block-compatible mounting holes on the rotary knob cap
• UART daisy-chain protocol at 115200 bps for cascading connections

Application examples:

• Menu navigation in user interfaces
• Value setting with confirmation function
• Smart home controls with rotary knobs
• Robotic controls with incremental input
• Audio projects with volume and confirmation

Documentation:

• M5Stack Wiki
• Official M5Stack Forum

Technical data:

• Manufacturer: M5Stack
• Manufacturer SKU: U207
• MCU: STM32G031G8U6
• Input: AB rotary encoder with button
• Input voltage: DC 5V
• Communication: UART 115200 bps 8N1
• Interfaces: 2× HY2.0-4P
• RGB LED: 1× WS2812B
• RGB power consumption: 22.51 mA
• Operating temperature: 0 ~ 40°C
• Product dimensions: 23.9 × 23.9 × 29.8 mm
• Product weight: 10 g
• Package dimensions: 135 × 90 × 25 mm
• Gross weight: 14 g

Scope of delivery:

• 1× M5Stack Chain Encoder
• 1× Chain Bridge Connector