Unit Scroll

SKU:U186

Description

Unit Scroll is a rotary encoder expansion unit with a scroll-wheel form factor. It integrates a 12-bit through-shaft pulse encoder, a button input, and a WS2812C programmable RGB LED. The built-in STM32F030 microcontroller runs firmware for encoder pulse signal acquisition, allowing users to directly obtain encoder values via I2C read operations, greatly simplifying the usage process. This unit is suitable for control scenarios such as value scaling adjustment and volume control.

Features

Based on STM32 microcontroller
AB phase output (12 pulses / rotation)
Built-in button
Colorful WS2812C RGB LED indicator
I2C communication interface

Includes

1 x Unit Scroll
1 x HY2.0-4P Grove Cable (20cm)

Applications

Industrial automation
Smart home
Robotics
Human–machine interaction

Specifications

Specification	Parameter
MCU	STM32F030F4P6@32-bit ARM Cortex-M0
Rotary Encoder	EC10E
Encoder Output	AB quadrature output
Encoder Resolution	12 pulses / rotation
RGB LED	1x WS2812C
Button	1x Button
I2C Address	0x40
Operating Temperature	0 ~ 40°C
Product Size	32.0 x 24.0 x 18.9mm
Product Weight	7.5g
Package Size	138.0 x 93.0 x 19.9mm
Gross Weight	12.7g

Schematics

PinMap

Unit Scroll

HY2.0-4P	Black	Red	Yellow	White
PORT.A	GND	5V	SDA	SCL

STM32F030F4P6 Internal Peripheral Pin Connections

STM32F030F4P6	PA6	PA7	PA9	PA10	PA0	PA5
Encoder	A1	B1
I2C			SCL	SDA
WS2812C RGB LED					RGB
Button						BTN1

Model Size

Structure

Unit Scroll Structure Files

Datasheets

Rotary Encoder EC10E

Softwares

Arduino

Unit Scroll Arduino Library

Internal Firmware

Unit Scroll Internal Firmware

Protocol

UiFlow2

Unit Scroll UiFlow2 Docs

Video

Unit Scroll Feature Introduction

UiFlow2 Unit Scroll

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)