M5Stack RollerCAN Unit with BLDC Motor (STM32)
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M5Stack RollerCAN Unit with BLDC Motor (STM32)
⚙️ RollerCAN Unit: Smart Motion Control in a Compact Kit The RollerCAN Unit is a brushless DC motor motion control kit 🌀 packed with multi-function integration for efficient and precise movement. It supports 6–16V DC input via XT30 🔌 and 5V input via Grove interface 🌱, with automatic power factor adjustment for optimal performance ⚡.
Powered by a 3504 200KV brushless motor, the unit features a built-in FOC closed-loop drive system 🔁. It handles up to 0.5A continuous phase current (no forced cooling) and 1A for short bursts 🔥.
For precision feedback, it uses a magnetic encoder 🧲 and supports triple-loop control over current, speed, and position 🎯. The shaft supports slip ring installation, enabling 360° rotation 🔄 while maintaining Grove interface connectivity—perfect for stacking additional modules on top while ensuring seamless power and data transmission 🔗.
🧠 Intuitive Interface & Developer-Ready Design The RollerCAN Unit features a 0.66-inch OLED display on the reverse side for real-time status monitoring 📺, along with an RGB indicator and function button for seamless human-machine interaction 🎛️.
Its top and base include LEGO-compatible mounting holes and M3 screw ports, enabling easy assembly and modular integration 🧩. Both hardware and software are fully open-source, supporting motion control and parameter tuning via bus communication 🔄.
For developers, it offers SWD and SWO debugging interfaces, providing greater flexibility during prototyping and customization 🛠️. Ideal for machine joints, motion control systems, industrial automation, and visual demonstration projects 🚀.
Arduino
Features
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🌀 Brushless DC Motor Control – Smooth, efficient motion with minimal noise and wear
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🔗 CAN & I2C Communication – Dual protocol support for flexible integration
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📺 Integrated OLED Display – Real-time status monitoring at a glance
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🌈 RGB Indicator Light – Visual feedback for system states and alerts
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🔁 FOC Closed-Loop Drive System – Precision control over current, speed, and position
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🔄 Slip Ring Support
Package Includes
- 1x RollerCAN Unit
- 1x PwrCAN Cable (10cm)
- 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 inner hex socket cap screws M3x14mm
- 4x inner hex countersunk screws M3x14mm
- 4x inner hex countersunk screws M3x12mm
- 1x single-head terminal cable 5P debugging cable 1.25mm pitch, 100mm length
Product Comparison

Applications
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🔩 Precision Robotic Joint Control – Seamless integration into articulated systems
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🏭 Smart Manufacturing Equipment – Optimized for industrial automation and intelligent workflows
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🎥 Visual Demonstration Projects – Perfect for educational setups, exhibitions, and prototyping showcases
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 Interface | 2x CAN (XT30 interface) @ XT30 (2+2) PW-M 2x I2C (0x64) |
| Display | 0.66-inch OLED display, resolution: 64*48, SPI communication |
| RGB LEDs | 2x WS2812-2020 |
| Motor Power Supply | CAN (XT30 interface) @ 6-16V power supply 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 CAN (XT30 interface) power supply DC16V @ 32mA |
| Output Torque | Grove port DC5V power supply: 0.021N.m / 0.2kgf.cm @ 350mA current CAN (XT30 interface) DC16V power supply: 0.065N.m / 0.66kgf.cm @ 927mA current |
| Slip Ring (Grove port) Output Capacity | DC5V / 300mA |
| Noise Level | 48dB |
| Operating Temperature | 0-40°C |
| Product Dimensions | 40*40*40mm |
| Package Dimensions | 170*75*52mm |
| Product Weight | 84.4g |
| Package Weight | 157.7g |
Schematics

PinMap
Unit RollerCAN
| HY2.0-4P | Black | Red | Yellow | White |
|---|---|---|---|---|
| PORT.A | GND | 5V | SDA | SCL |
I2C, CAN, RGB, Button
| STM32G431CBU6 | PA15 | PB7 | PA11 | PA12 | PB4 | PB5 | PC6 |
|---|---|---|---|---|---|---|---|
| I2C | SYS_I2C_SCL | SYS_I2C_SDA | |||||
| CAN | FDCAN_RX | FDCAN_TX | CAN_STB | ||||
| 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

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2. Shipping Rates & Options
Our shipping rates are calculated based on the order value and destination. Please refer to the tables below for details.
2.1 Germany (Domestic)
| Shipping Method | Order Value | Cost | Est. Delivery |
|---|---|---|---|
| Deutsche Post | €0 - €50.00 | €4.95 | 2-4 Business Days |
| Deutsche Post | Over €50.00 | Free | 2-4 Business Days |
|
DHL Paket (Faster Delivery) |
€0 - €50.00 | €6.95 | 1-3 Business Days |
|
DHL Paket (Faster Delivery) |
€50.00 - €100.00 | €2.00 | 1-3 Business Days |
|
DHL Paket (Faster Delivery) |
Over €100.00 | Free | 1-3 Business Days |
2.2 European Union (EU)*
*Including:
| Shipping Method | Order Value | Cost | Est. Delivery |
|---|---|---|---|
| Deutsche Post | €0 - €100.00 | €7.95 | 5-9 Business Days |
| Deutsche Post | Over €100.00 | Free | 5-9 Business Days |
|
DHL Paket (Faster Delivery) |
€0 - €100.00 | €15.95 | 3-7 Business Days |
|
DHL Paket (Faster Delivery) |
€100.00 - €250.00 | €7.95 | 3-7 Business Days |
|
DHL Paket (Faster Delivery) |
Over €250.00 | Free | 3-7 Business Days |
2.3 United States
| Region | Shipping Method | Order Value | Cost | Est. Delivery |
|---|---|---|---|---|
|
Continental U.S. (50 States) |
USPS Ground Advantage | €0 - €45.00 | €5.95 | 3-7 Business Days |
| USPS Ground Advantage | Over €45.00 | Free | 3-7 Business Days | |
| USPS Priority Mail | €0 - €45.00 | €16.95 | 1-4 Business Days | |
| USPS Priority Mail | Over €45.00 | €14.95 | 1-4 Business Days | |
|
Non-Continental U.S. (AK, HI, PR, etc.) |
USPS Ground Advantage | €0 - €60.00 | €6.95 | 5-9 Business Days |
| USPS Ground Advantage | Over €60.00 | Free | 5-9 Business Days |
* The regions in the Non-Continental U.S. include: Alaska, American Samoa, Guam, Hawaii, the Marshall Islands, the Northern Mariana Islands, Palau, Puerto Rico, the U.S. Virgin Islands, and all U.S. Armed Forces addresses. The shipping and delivery to these areas are subject to the Non-Continental U.S. shipping rules.
2.4 International (Outside EU)
For specific international destinations, including Switzerland, United Kingdom, and Norway.
| Order Amount | Shipping Cost |
|---|---|
| €0 - €300.00 | €19.95 |
| Over €300.00 | Free |
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Our products are stored in our Munich, Long Beach, and Shenzhen warehouses to provide more flexible logistics solutions tailored to different regions and customer needs. On each product's description page, we indicate the specific warehouse location to help you better plan your purchase and delivery schedule.
3.1 German Warehouse
For products stored in our warehouse in Munich, we use either Deutsche Post or DHL for shipping, depending on the size of the package. Logistics within Germany are very efficient, with an estimated delivery time of 2-4 business days, ensuring you receive your order quickly and conveniently. For Western EU countries, the estimated delivery time is 4-6 business days. For Eastern EU countries, the estimated delivery time is 6-8 business days.
3.2 US Warehouse
For products stored in our warehouse in Long Beach, we use either USPS or UPS for shipping, depending on the size of the package. Logistics within U.S. are very efficient, with an estimated delivery time of 3-7 business days, ensuring you receive your order quickly and conveniently.
3.3 Chinese Warehouse
For Pre-order items or orders fulfilled directly from our Shenzhen warehouse, we utilize YunExpress for reliable international shipping. Given the complexities of international shipping, the estimated delivery time for these packages is around 10 business days, though this may vary slightly due to customs processes or other uncontrollable factors. Otherwise, products will be restocked to our Munich or US warehouses before final delivery, as detailed in the "Important Notice" above.
4. Customs and Taxes
4.1 How are customs handled by OpenELAB for import or export?
For EU Member States: Whether shipped from Germany or China, we cover all import duties and taxes (DDP), ensuring that you receive your package without any additional costs or hassle with customs.
For countries outside of the European Union, such as Switzerland and Norway, you may be subject to import duties, taxes, and/or customs fees charged upon delivery. These fees vary from country to country and are the sole responsibility of the recipient.
⚠️ Refusal of Delivery: If you refuse to pay these fees upon delivery and the package is returned to us, the refund amount will be calculated after deducting the original shipping costs, return shipping costs, and any applicable customs or storage fees.
4.2 How is VAT charged when the Customer places an order from OpenELAB?
In accordance with the newest VAT e-commerce rules in the EU, OpenELAB shall have the right to charge the amount of VAT at checkout. The standard rate of actual VAT applied is subject to the destination country's regulations. No additional VAT will be charged upon delivery for these orders.












