Unit Scroll
Description
Scroll unit is a rotary encoder expansion unit in the form of a scroll wheel. It integrates a 12-pulse through-shaft encoder + button input + WS2812C programmable RGB LED. The built-in STM32F030 microcontroller integrates encoder pulse signal acquisition firmware, allowing users to directly obtain encoder values through I2C reading operations, simplifying complex processes. It is suitable for control scenarios such as scale value control and volume adjustment.
Product Features
- Based on STM32 microcontroller
- AB phase output (12 pulses per revolution)
- Built-in button
- Multi-color WS2812C RGB LED indicator
- I2C communication interface
Includes
- 1x Scroll Unit
- 1x HY2.0-4P Grove cable (20cm)
Applications
- Industrial Automation
- Smart Home
- Robotics
- Human-Computer Interaction
Specifications
| Specification | Parameter |
|---|---|
| MCU | STM32F030F4P6@32-bit ARM Cortex-M0 processor |
| Rotary Encoder | EC10E |
| Rotary Encoder Output | AB two-phase quadrature output |
| Rotary Encoder Pulses | 12 pulses/revolution |
| RGB LED | 1x WS2812C |
| Button | 1x Button |
| I2C Communication Address | 0x40 |
| Operating Temperature | 0-40°C |
| Product Size | 32*24*18.9mm |
| Package Size | 136*92*20mm |
| Product Weight | 7.3g |
| Package Weight | 12.7g |
Related Links
Schematic
PinMap
- Default I2C (PORT A) interface pin definitions for different M5 hosts
| PORT A | SCL | SDA | VCC | GND |
|---|---|---|---|---|
| Core(Basic) | G22 | G21 | 5V | GND |
| Core2 | G33 | G32 | 5V | GND |
| CoreS3 | G1 | G2 | 5V | GND |
| Atom Lite/Atom Matrix | G32 | G26 | 5V | GND |
| AtomS3/AtomS3 Lite | G1 | G2 | 5V | GND |
| StickC PLUS/PLUS2 | G33 | G32 | 5V | GND |
- Internal peripheral connection pins for STM32F030F4P6
| STM32F030F4P6 | PA6 | PA7 | PA9 | PA10 | PA0 | PA5 |
|---|---|---|---|---|---|---|
| Encoder | A1 | B1 | ||||
| I2C | SCL | SDA | ||||
| WS2812C RGB LED | RGB | |||||
| Button | BTN1 |
Dimensions
Usage Protocol
Example
Arduino
Internal Firmware
Video
- Scroll Unit Feature Introduction
- UIFlow2.0 Scroll Unit
Product Comparison
| Product Compare |
Unit Scroll
|
Unit Encoder
 |
Unit 8Encoder
 |
|---|---|---|---|
| Form | Wheel | Knob | Knob |
| Channels | 1 | 1 | 8 |
| Resolution | 12 pulses/rotation | 30 pulses/rotation | 15 pulses/rotation |
| Position | AB Quadrature Output | AB Quadrature Output | AB Quadrature Output |
| Communication Mode | I2C (0x40) | I2C (0x40) | I2C (0x41) |