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Unit Roller485-Lite

SKU:U182-Lite

Description

Unit Roller485-Lite is a brushless DC motor motion execution kit with integrated control functions, designed for efficient motion control. The product supports 6-16V DC power input (via the PWR485 interface) or 5V input (via the Grove interface), and can automatically adjust the power coefficient to ensure optimal performance. It features a built-in FOC closed-loop drive system, using a 3504 200KV brushless motor, with a maximum continuous phase current of 0.5A and a short-term current of 1A without forced cooling. The driver uses a magnetic encoder as feedback, supporting current, speed, and position triple-loop control to ensure precise control.

Additionally, the device is equipped with a 0.66-inch OLED display on the back to show real-time device status, and includes RGB indicators and function buttons for easy human-machine interaction. The product base is designed with LEGO-compatible mounting holes and M3 screw holes for quick assembly and integration. The Unit Roller485-Lite is fully open-source in both hardware and software, supporting motion control and parameter adjustment via RS485 or I2C buses, and provides SWD and SWO debugging interfaces to further enhance developer flexibility. This product is widely used in robotic joints, motion control, industrial automation, and visual demonstration projects.

This tutorial will introduce you to the Unit Roller485 Lite usage guide

Features

  • Brushless DC motor control
  • RS-485 communication / I2C communication control
  • Integrated OLED display
  • RGB indicators
  • FOC closed-loop drive system

Includes

  • 1 x Roller485 Lite Unit
  • 1 x HT3.96-4P connector
  • 1 x HY2.0-4P Grove cable (5cm)
  • 6 x Friction pins
  • 1 x Flange
  • 1 x Bracket
  • 1 x Hex key (2.5mm)
  • 1 x Hex key (2mm)
  • 6 x M3 nuts
  • 2 x Hex socket head M3x14mm screws
  • 4 x Hex socket head M3x14mm screws
  • 2 x Hex socket head M3x12mm screws
  • 4 x Hex socket head M3x5mm screws
  • 1 x Single-ended terminal wire 5P debug cable

Applications

  • Robotic joint control
  • Smart manufacturing equipment
  • Visual demonstrations

Specifications

Specification Parameters
MCU STM32G431CBU6@Cortex-M4, 128KB-Flash, 32KB-SRAM, 170MHz
Motor Type D3504 200KV brushless motor@diameter: 41mm
Driver Chip DRV8311HRRWR
Angle Sensor TLI5012BE1000
Communication Interfaces 1x PWR-485 (HT3.96-4P interface)
1x I2C (0x64)
Display 0.66-inch OLED display, resolution: 64 x 48, SPI communication
RGB LEDs 2x WS2812-2020
Motor Power RS-485 (VH3.96-4P interface) power@6-16V
Grove port DC5V power
Load Load: 50g, Motor speed: 2100rpm, Current: DC16V/225mA
Load: 200g, Motor speed: 1400rpm, Current: DC16V/601mA
Load: 500g (maximum load), Motor speed: 560rpm, Current: DC16V/918mA
No load: DC16V/78mA
Standby Current Grove port DC5V power@70mA
RS-485 (VH3.96-4P interface) power DC16V@32mA
Noise 48dB
Output Torque Grove port DC5V power: 0.021N.m/0.2kgf.cm@current 350mA
RS485 (VH3.96-4P interface) power: 0.065N.m/0.66kgf.cm@current 927mA
Operating Temperature 0 ~ 40°C
Product Dimensions 40 x 40 x 30mm
Package Dimensions 170 x 75 x 52mm
Product Weight 70.0g
Gross Weight 146.9g

Learn

The main difference between Unit-Roller485 Lite and Unit-Roller485 is that Unit-Roller485 Lite does not have a slip ring expansion Grove interface or a top LEGO expansion interface.
Power Supply Voltage
The power supply should not exceed 16V. If the voltage exceeds 18V, the motor fault code E:1 will be displayed, the motor will not work, and "Over Voltage" will be displayed with the LED light turning red.

Schematics

schematics

PinMap

Unit Roller485-Lite

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

I2C, PWR485, RGB, Button

STM32G431CBU6 PA15 PB7 PC11 PC10 PB4 PB5 PC6
I2C SYS_I2C_SCL SYS_I2C_SDA
PWR485 RS485_RX RS485_TX RS485_DIR
WS2812C LED_DAT
Button A SYS_SW

OLED

STM32G431CBU6 PB15 PB13 PB14 PB10 PB12
OLED OLED_MOSI OLED_SCK OLED_DC OLED_RST OLED_CS

Model Size

Datasheets

Softwares

Arduino

Internal Firmware

Communication Protocols

Video

  • Roller485 Lite Unit Product Introduction and Case Demonstration