Roller485 Unit with BLDC Motor (STM32)

The Roller485 Unit is a brushless DC motor (BLDC) actuator kit made for efficient motion control. It supports both 6-16V DC input via the PWR485 interface and 5V input via the Grove connector, automatically adjusting power for optimal performance. It has a FOC closed-loop drive system and a 3504 200KV motor, providing precise control of current, speed, and position. It includes a magnetic encoder for feedback, an OLED display for real-time status, RGB indicators, and LEGO-compatible mounting options. Ideal for robotics, industrial automation, and more, it supports RS485 and I2C communication with open-source hardware and software for flexible integration. Note: The main difference between the Unit-Roller485 Lite and Unit-Roller485 is that the Lite version does not include the slip ring extended Grove connector or the top LEGO expansion interface. To purchase the lite version, click here Features

* Brushless DC motor control (BLDC)

* RS-485 communication / I2C communication control

* Integrated OLED display

* RGB indicator lights

* FOC closed-loop drive system

Specifications

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" OLED display, resolution: 64 x 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 ringGrove port DC5V power supply

Load Load: 50g Motor Speed: 2100rpm Current: DC16V/225mA

Load: 200g Motor Speed: 1400rpm Current: DC16V/601mA

Load: 500g 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 x 40 x 40mm

Packaging Size 170 x 75 x 52mm

Product Weight 82.9g

Packaging Weight 158.1g

Resources

* Product Wiki

* Unit Roller485 Tutorial

Arduino Example Code

* Roller485 Unit Library

* STM32 Firmware

Package Contents

* 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