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Unit-Roller485

SKU:U182

Description

Roller485 Unit is a brushless DC motor (BLDC) motion actuator kit integrated with multiple control functions, designed for efficient motion control. The product supports 6-16V DC power input (via PWR485 interface) or 5V input (via Grove interface) and can automatically adjust the power coefficient to ensure optimal performance. It features an internal FOC closed-loop drive system and uses a 3504 200KV brushless motor, with a maximum continuous phase current of 0.5A without forced cooling, and short-term peak current of 1A. The driver uses a magnetic encoder for feedback and supports current, speed, and position control, ensuring precise motion control. The device’s axle can be equipped with an optional slip ring, allowing the top Grove interface to remain connected to the bottom, enabling the expansion of additional modules while supporting 360° rotation, ensuring power supply and data transmission to the rotating part.
Additionally, the back of the device features a 0.66-inch OLED display that can show real-time status, along with RGB indicator lights and function buttons for human-machine interaction. The top and base of the product are designed with LEGO-compatible mounting holes and M3 screw holes, allowing for easy setup and integration. The hardware and software of the Roller485 Unit are fully open-source, supporting motion control and parameter adjustment via RS485 or I2C buses. The unit also provides SWD and SWO debugging interfaces to enhance user flexibility. This product is widely used in robotic joints, motion control, industrial automation, and visual demonstration projects.

This tutorial will introduce you the usage of Unit Roller485

Product Features

  • Brushless DC motor control (BLDC)
  • RS-485 communication / I2C communication control
  • Integrated OLED display
  • RGB indicator lights
  • FOC closed-loop drive system

Included

  • 1x Roller485 Unit
  • 1x HT3.96R-4P plug
  • 2x HY2.0-4P Grove cables (5cm)
  • 6x Friction pins
  • 1x Flange
  • 1x Bracket
  • 1x Hex key(2.5mm)
  • 1x Hex key(2mm)
  • 6x M3 nuts
  • 2x M3x14mm socket head screws
  • 4x M3x14mm countersunk head screws
  • 4x M3x12mm countersunk head screws
  • 1x Single-end terminal wire 5P debugging cable

Applications

  • Robotic joint control
  • Smart manufacturing equipment
  • Visual demonstrations

Specifications

Specification Parameter
MCU STM32G431CBU6 @ Cortex-M4, 128KB Flash, 32KB SRAM, 170MHz
Motor Type D3504 200KV brushless motor @ diameter: 41mm
Driver Chip DRV8311HRRWR
Angle Sensor TLI5012BE1000
Communication Interface PWR-485 (HT3.96-4P interface)
I2C (0x64)
Display 0.66-inch OLED display, resolution: 64*48, SPI communication
RGB LEDs 2x WS2812-2020
Motor Power Supply PWR-485 (HT3.96-4P interface) @ 6-16V
Grove port DC5V power supply
Slip ring_Grove port DC5V power supply
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 supply @ 70mA
RS-485 (HT3.96-4P interface) power supply DC16V @ 32mA
Output Torque Grove port DC5V power supply: 0.021N.m/0.2kgf.cm @ current 350mA
RS485 (VH3.96-4P interface) DC16V power supply: 0.065N.m/0.66kgf.cm @ current 927mA
Slip Ring (Grove Port) Output Capacity DC5V/300mA
Noise 48dB
Operating Temperature 0-40°C
Product Size 40*40*40mm
Packaging Size 170*75*52mm
Product Weight 82.9g
Packaging Weight 158.1g

Schematic

schematics

PinMap

  • PORT A Interface
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 G21 G25 5V GND
AtomS3 / AtomS3 Lite G39 G38 5V GND
StickC PLUS / PLUS2 G33 G32 5V GND
  • I2C\PWR485\RGB\BUTTON
STM32G431CBU6 PA15 PB7 PC11 PC10 PB4 PB5 PC6
I2C SYS_I2C_SCL SYS_I2C_SDA
PWR-485 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

Module Size

Protocol

  • I2C Protocol

Roller485 Unit I2C Protocol Table

Roller485 Unit I2C user manual

  • RS485 Protocol

Roller485 Unit RS485 Protocol Table

Roller485 Unit RS485 user manual

Example Code

Arduino

Roller485 Unit Library

STM32 Firmware

Video

  • Roller485 Unit Introduction and Example