Description
Chain Angle is a potentiometer knob input node in the M5Stack Chain series. As the potentiometer knob rotates, the voltage value at the sampling terminal varies within a fixed range. After ADC conversion by the built-in MCU, a signal value with up to 12-bit resolution is output. It also integrates a programmable RGB LED for status indication and interactive display. It is suitable for applications such as human-machine interfaces, smart home systems, and motor speed control.
Chain Angle integrates an STM32G031G8U6 core MCU and uses a UART serial cascade communication protocol. Through two HY2.0-4P expansion interfaces, more Chain series devices can be connected to build richer interactive applications.

Features
- M5Stack Chain series
- Potentiometer knob input
- STM32G031G8U6 core MCU
- 1x RGB LED
- Uses UART serial cascade communication protocol
- 2x HY2.0-4P expansion interfaces for extending Chain series devices
Includes
- 1 x Chain Angle
- 1 x Chain Bridge

Applications
- Smart home control
- Human-machine interface
- Volume control
- Motor speed control

Specifications
| Specification | Parameter |
|---|---|
| MCU | STM32G031G8U6 |
| Input Power | DC 5V |
| Communication | UART 115200bps@8N1 |
| Interface | 2x HY2.0-4P |
| RGB LED | 1x WS2812C |
| RGB Power On Consumption | 21.13mA |
| Rotation Angle | 280° ±10° |
| Operating Temperature | 0 ~ 40°C |
| Product Size | 23.9 x 23.9 x 28.2mm |
| Product Weight | 8.4g |
| Package Size | 138.0 x 93.0 x 26.0mm |
| Gross Weight | 11.7g |