Waveshare 5 + 1 DOF High-Torque Serial Bus Servo Dual Robotic Arm AI Kit

€449,95

incl. VAT

SKU: Waveshare-31268

Pre-order

Type: M3-S

M3-S M3-Pro

Product variants

Quantity

Guarantee & Return Policy

Effective Date: December 10, 2025

At OpenELAB, we are committed to providing accurate product descriptions and high-quality electronics. The following policy outlines your rights and obligations, designed to be fair to both our customers and our business operations globally.

1. Warranty Policy

A. Standard Limited Warranty (Global & US)

For customers in the United States, Asia, and other non-EU regions:

Warranty Period: OpenELAB provides a 12-month warranty from the date of delivery.
Coverage: This warranty covers defects in material and workmanship under normal use.
Resolution: We will repair or replace defective units at no charge.

B. Statutory Rights for EU/UK Customers (EU Compliance)

If you are a consumer residing in the European Union or the UK purchasing from our global site:

Statutory Guarantee: You are entitled to a 24-month statutory guarantee for conformity defects present at the time of delivery, in accordance with EU consumer protection laws.
Relation: The Standard Limited Warranty (Section 1.A) applies in addition to, and does not replace, your statutory rights.

C. Warranty Exclusions (Applies to ALL Regions)

Warranty coverage is VOID if the damage is caused by:

Misuse: Incorrect installation, reverse polarity, or exceeding voltage limits.
Unauthorized Modification: This explicitly includes soldering, cutting pins, modifying the PCB, or flashing unauthorized/beta firmware that "bricks" the device.
Physical Damage: Drops, moisture/water damage, or electrical surges (lightning).
Normal Wear & Tear: Consumable parts (e.g., batteries), unless defective upon arrival.

Note: For non-warranty repairs (e.g., customer-induced damage), we may offer repair services for a fee. Shipping and diagnostic costs will be borne by the customer.

2. Return & Refund Policy

A. Return Window

Standard: You may request a return within 30 days of receiving your order.
EU Customers: You have the statutory right to withdraw from the contract within 14 days of receipt without giving a reason.

B. Refund Conditions & Restocking Fees

To protect against policy abuse, the refund amount is strictly determined by the condition of the returned item.

1. Full Refund (100%)

The item is Brand New, Unopened, and Unused.
The original packaging is intact and sealed.
All accessories are present.

2. Partial Refund (Restocking Fee / Value Depreciation)
If the item is returned in a condition that prevents it from being sold as new, OpenELAB reserves the right to deduct a Restocking Fee (or "Compensation for Loss of Value" for EU customers) from the refund.
Deductions apply if:

Signs of Use: Visible scratches, mounting marks on screw holes, or fingerprints.
Damaged Packaging: Original box is torn, written on, or missing.
Technical Modification: The device has been powered on, programmed/flashed, or soldered.
Broken Seals: Anti-static bags or security seals have been opened.

Depending on the severity of the usage/damage, the deduction may range from 15% to 50% of the product price. Items damaged beyond repair due to misuse will not be refunded.

C. Shipping Costs

Defective / Wrong Item: OpenELAB covers the return shipping cost.
Customer Remorse (Changed Mind / Ordered Wrong Item): The customer is responsible for all return shipping costs to our designated return center (located in the US, Germany, or China, depending on your region). Original shipping fees are non-refundable unless required by local law.

3. Return Process (RMA)

To ensure a smooth return process, please follow these steps:

Authorization: Contact us at info@openelab.io before returning any item. Returns without prior authorization will not be accepted.
RMA Number: We will provide you with a Return Merchandise Authorization (RMA) number and the correct return address.
Packing: Ship the item back in its original packaging with the RMA number clearly marked on the shipping label (not on the product box).
Tracking: We strongly recommend using a trackable shipping method. OpenELAB is not responsible for returns lost in transit.

- Pre-Ordering: If an item is unavailable, you can pre-order it. We'll dispatch once stock is replenished. For specific delivery times, please feel free to contact us for inquiries.

- Express Shipping: Need it faster? Contact us via email or through our live chat support, and we'll arrange expedited delivery for you.

Waveshare 5 + 1 DOF High-Torque Serial Bus Servo Dual Robotic Arm AI Kit

The RoArm-M3 is a 5 + 1 DOF high-torque serial bus servo dual robotic arm AI kit, supporting the Hugging Face LeRobot AI Robotic Project. Based on ESP32, it features a 2-DOF wrist joint, flexible expansion capabilities, secondary development support, and wireless control.

Kit Selection Guide

Version	RoArm-M3-S/Pro-AI-Kit	RoArm-M3-S/Pro-ORIN-AI-Kit
Kit model	RoArm-M3-S-AI-Kit RoArm-M3-Pro-AI-Kit	RoArm-M3-S-ORIN-NANO-AI-Kit RoArm-M3-Pro-ORIN-NANO-AI-Kit RoArm-M3-S-ORIN-NX-AI-Kit RoArm-M3-Pro-ORIN-NX-AI-Kit
Main control board	NOT included	Options for Jetson Orin Nano Super / Jetson Orin NX Super development board (Waveshare 8GB Kit)
Controlled Connection	Connect to a PC or your own main control board via USB port / WI-FI	Directly connect to the built-in Jetson Orin development board
Suitable for	For users who already have a Jetson Orin series development board or PC	For users who need an all-in-one solution and high-efficiency AI inference
Kit accessories	Leader robotic arm × 1, Follower robotic arm × 1, USB hub × 1, USB camera (with holder) × 2, grasping target (foam block) × 2

Model Selection Guide

Need stronger AI inference performance? Choose the ORIN-AI-Kit Series:

Options for Jetson Orin Nano Super or Jetson Orin NX Super (Waveshare 8GB kit) to achieve low-latency, high-throughput AI computing.
The Orin platform offers rich interfaces and powerful computing capabilities, enabling robotic arms to perform better in visual recognition, path planning, and real-time feedback, significantly enhancing the overall scalability and intelligence of the system.

Or choose the RoArm-M3-S/Pro-AI-Kit Version if you have a Jetson Orin development board or PC:

More flexible to use with your own controller: The kit includes all necessary accessories except the main control board, allowing direct use with your PC or existing Jetson Orin development board.
More cost-effective: Retains full functionality while reducing entry costs for robotic arm applications, making development easier and more flexible.

RoArm-M3-S / RoArm-M3-Pro robotic arm options. Choose Pro version for higher stability and precision:

The RoArm-M3-Pro features a more robust mechanical structure and higher joint precision compared to the RoArm-M3-S version, making it suitable for industrial or research scenarios with repeatability and strict requirements of anti-interference capabilities.

5 + 1 DOF High-Torque Serial Bus Servo Robotic Arm Kit, version options

Parameter Comparison

Not including the weight of the table edge fixing clamp (290±10g).

RoArm-M3-AI-Kit: 5 + 1 DOF Robotic Arm AI Kit

Supports the popular Hugging Face LeRobot AI robotics project, comes with stable and regularly updated demos, suitable for use with Jetson Orin Nano Super / Jetson Orin NX Super or a PC.

RoArm-M3-S-AI-Kit, RoArm-M3-AI-Kit six-axis robotic arm

Product Introduction

The RoArm-M3-AI-Kit series supports the popular AI robotic arm project LeRobot, integrating its pretrained models and datasets with demonstrations, providing strong support for research directions such as Imitation Learning and Reinforcement Learning. By utilizing the demos and algorithm libraries of LeRobot, developers can quickly deploy intelligent algorithms onto the RoArm-M3, further expanding the possibilities for innovative applications.

RoArm-M3-S/Pro in the kit is a 5 + 1 DOF smart robotic arm designed for innovative applications. It adopts a lightweight structure design with an effective payload of 0.2kg@0.5m. It can be flexibly mounted on various mobile platforms. It adopts a 360° omnidirectional base combined with five flexible joints to create a workspace with 1-meter diameter.

The joint direct-drive design enhances repositioning precision and also improves structural reliability, with innovative dual-drive technology doubling the shoulder joint torque. The onboard ESP32 MCU main control module supports multiple wireless control modes and provides control interfaces and rich communication protocols for easily connecting to various devices.

It provides a user-friendly and cross-platform WEB application that integrates a simple and visualized coordinate control mode, making it easier to get started. It comes with rich graphic and video tutorials to help you learn and use it quickly. Compatible with ROS2 and various host computers, it supports various wireless and wired communication modes. It comes with expansion plates, supporting customizing the EoAT (End of Arm Tooling) to meet innovative application requirements.

The RoArm-M3-AI-Kit series achieves an excellent balance between lightweight, user-friendliness, expandability, and open innovation. It is a multi-functional robotic arm that integrates intelligent control, human-machine interaction, and customizable development. Ideal for applications that require a combination of flexibility, expandability, and user-friendliness.

Compatible with the popular AI robotic arm project - LeRobot

The RoArm-M3 robotic arm series supports the open-source LeRobot framework on Hugging Face, providing core resources such as pretrained models, datasets with human collected demonstrations, and simulation environments. When combined with the N-VIDIA Jetson Orin Nano Super / Jetson Orin NX Super motherboard or a PC with an N-VIDIA discrete GPU, users can experience the complete process of Imitation Learning and Reinforcement Learning projects.

LeRobot RoArm-M3 Robotic Arm Kit

Adopts a Leader-Follower robotic arm solution to collect data and build datasets for subsequent model training in imitation learning and reinforcement learning.

Flexible Joints and Omnidirectional Space

Adopts a 360° rotation base and flexible joints to create an omnidirectional operating space with a 1-meter diameter, allowing the Robotic Arm to move freely in all directions.

RoArm-M3-S-AI-Kit, supports omnidirectional operating space with a 1-meter diameter

2 DOF Wrist Joint + EoAT for More Flexible Clamping

Equipped with a 2 DOF wrist joint with pitch + horizontal rotation support, enabling seamless coordination with the EoAT for multi-dimensional clamping and operation.

RoArm-M3-S-AI-Kit, with 2 DOF wrist joint

Easy to Control via Cross-platform Web Application

No App installation required; access after entering the address. Allows users to connect and control RoArm-M3 via mobile phones, tablets, and computers by clicking the buttons on the Web App. Supports secondary development of this open-source Web App to customize the user interface and add new functions.

RoArm-M3-S-AI-Kit, supports controlling via Web Application

Completely Open Source for Secondary Development

Completely open source for the control codes and communication interface documents of the RoArm-M3 series, supporting multiple languages and devices for secondary development. Provides modularized demos and tutorials for zero-based users, making it easy to get started.

RoArm-M3-S-AI-Kit, open source for secondary development

Joint Direct-Drive Design: Feedback Precision Up to 0.088°

The joint angle feedback can be obtained directly via the 12-bit high-precision magnetic encoder without any reduction groups, which is more accurate. The actual position of the current target point can be calculated based on the joint angle feedback.

RoArm-M3-S-AI-Kit, with 12-bit high-precision magnetic encoder

Innovative Dual-Drive Technology Doubles Shoulder Joint Torque

We have developed a dual-drive control algorithm that allows the two servos at the shoulder joint to coordinate their output torque effectively, significantly enhancing the power and the overall load capacity of the RoArm-M3 Series.

RoArm-M3-S-AI-Kit, adopts innovative dual-drive technology

Direct-Drive Clamp Enables Precise Force Control

The direct-drive clamp design allows precise control of the clamping force in the program, suitable for clamping delicate objects without applying excessive force.

RoArm-M3-S-AI-Kit, adopts direct-drive clamp

Dynamic External Force Adaptive Control

After enabling this function, you can limit the maximum torque for each joint. When the external force applied to the joint exceeds the torque threshold (configurable), the robotic arm will rotate in response to the external force and will return to the specified position when the external force decreases below the torque threshold.

One-Click Automatic Recording: Easy to Create Actions

RoArm-M3 can save JSON instructions for robot control as task files. These task files can be saved in the Flash of ESP32, which will not be lost in case of power loss. The robotic arm can perform complex and repetitive operations by calling these task files.

RoArm-M3-S-AI-Kit, can save JSON instructions for robot control

Accurately Reach the Target by Entering the Coordinates

Open source for the inverse kinematics control algorithm in the three-dimensional Cartesian coordinate system. After entering the target position, the robot arm can accurately reach the target point by using the inverse kinematics function to calculate the rotation angle of each joint.

RoArm-M3-S-AI-Kit, inverse kinematics control algorithm demo

Curve Velocity Control for Smoother Movement

We use the curve velocity control algorithm to make the robotic arm move smoother and more naturally, without oscillations during start and stop.

RoArm-M3-S-AI-Kit, supports curve velocity control algorithm

ESP-NOW Wireless Control: Low-Delay Remote Collaboration

ESP-NOW is a low-delay ad hoc wireless communication protocol that doesn't require network infrastructures. You can use one robotic arm to wirelessly control other robotic arms, and the control methods can be set as broadcast control, group control, and one-to-one control.

RoArm-M3-S-AI-Kit, supports ESP-NOW wireless control

Note: The broadcast control has no limitation for the number of controlled devices, while the group control allows up to 20 devices. Please refer to the WIKI for more details.

Supports Leading-Following Control Mode Based on ESP-NOW

In the Leading-following control mode, the Leader robotic arm will send its joint angle information to other robotic arms via ESP-NOW communication. The other robotic arms which are in ESP-NOW Follower mode will imitate the same actions as the Leader in real time.

RoArm-M3-S-AI-Kit, Leading-following control mode demo

Multiple Control Interfaces, Devices, and Languages Support

The RoArm-M3 series can be controlled not only by the WEB application but also supports using other controllers to send JSON commands via HTTP protocol network requests, serial communication, or USB communication for controlling and obtaining feedback.

RoArm-M3-S-AI-Kit, with multiple Control interfaces

Multiple Installation Methods for Integrating into Your Application

Provides multiple installation schemes and related secondary development resources, suitable for different usage scenarios and can be flexibly integrated into your projects and applications.

RoArm-M3-S-AI-Kit, supports multiple installation methods

Easy to Install Different Peripherals

The main structure of the upper arm adopts two 1020 European standard aluminum rails, supporting the installation of additional peripherals via boat nuts to meet different needs. It comes with boat nuts and corresponding M4 screws for easy installation.

Supports Installing a Camera to Extend Visual Applications

Comes with a camera holder and open source for the related drawings. You can directly install a camera with the corresponding size or other cameras with an adapter.

RoArm-M3-S-AI-Kit, supports installing a camera

For reference only; only the LED light is included.

Onboard ESP32 Main Control Board

Adopts the powerful ESP32 main control MCU, supporting multiple wireless communication protocols, with a large amount of open source resources to help secondary development of innovative applications.

Compatible with ROS2, Provides Model Establishment File and Supports Multi-Device Cooperation

Provides communication nodes of ROS2, URDF model description file, and a zero-based tutorial for ROS2.

Rich Tutorial Resources for Secondary Development

We provide complete unit tutorials and cases, including various functions and common application scenarios, to help users get started quickly for secondary development.

RoArm-M3-S-AI-Kit, lerobot framework control demo

RoArm-M3-S-AI-Kit, provides rich tutorial resources

General Driver Board for Robots

Onboard rich interfaces and resources for innovative development and functional expansion.

RoArm-M3-S-AI-Kit, General Driver Board onboard components

ESP32-WROOM-32 controller module
Can be developed using Arduino IDE
IPEX 1 WIFI connector
For connecting WIFI antenna to increase the wireless communication distance
LIDAR interface
Integrated LIDAR adapter function
I2C peripheral expansion interface
For connecting with OLED screen or other I2C sensors
Reset Button
Press and release to reboot the ESP32
Download button
Press when powering on to enter download mode
DC-DC 5V voltage regulator circuit
Provides power supply for host computers such as Raspberry Pi or Jetson nano
Type-C port (LADAR)
LIDAR data transmission
Type-C port (USB)
ESP32 communication interface, for uploading programs to ESP32
XH2.54 power port
Support DC 7~13V input, can directly power the serial bus servos and motors
INA219
voltage/current monitoring chip
Power ON/OFF
External power supply ON/OFF
ST series serial bus servo interface
For connecting with ST3215 / ST3235 serial bus servo
Motor interface PH2.0 6P
Group B interface for motor with encoder

Motor interface PH2.0 6P
Group A interface for motor with encoder
Motor interface PH2.0 2P
Group A interface for motor without encoder
Motor interface PH2.0 2P
Group B interface for motor without encoder
AK09918C
3-axis electronic compass
QMI8658C
6-axis motion sensor
TB6612FNG
Motor Control Chip
Serial bus servo control circuit
for controlling multiple ST3215 serial bus servos and obtaining servo feedback
TF card slot
Can be used to store logs or WIFI configurations
40PIN GPIO header
For connecting with Raspberry Pi or other host boards
40PIN extended header
Easy to use the GPIO pins of Raspberry Pi or other host boards
CP-2102
UART to USB, for LIDAR data transmission
CP-2102
UART to USB, for ESP32 communication
Automatic download circuit
For Uploading programs to the ESP32 without pressing the EN and BOOT buttons

Diversified Onboard Resources Supports Function Expansion

Integrated with INA219 battery voltage monitoring and 9-axis IMU sensor, supporting function expansion and innovation.

RoArm-M3-S-AI-Kit, with INA219 battery voltage Monitoring and 9-axis IMU sensor

RoArm-M3-S-AI-Kit, with OLED screen and LED light

Mouse Drag-and-Drop Interaction

Provides Web applications and desktop software (open-source programs developed by Python), supporting setting action instructions when the mouse is pressed and released to control the robotic arm flexibly.

RoArm-M3-S-AI-Kit, mouse drag-and-drop demo

Specifications

DOF	5 + 1
Work space	Horizontal diameter: 1120mm (Max, 360° omnidirectional), Vertical: 798mm (Max)
Operating voltage	12V 5A power supply, supports 3S Lithium batteries (NOT included)
Load capacity	0.2kg@0.5m
Repositioning precision	~ 5mm
Servo rotation speed	40rpm (no-load, no torque limit)
Operating range	BASE-360°, SHOULDER-180°, ELBOW-180°, WRIST-180°, ROLL-360°, HAND-135°
Drive type	TTL Serial bus servo, direct-drive joint
Servo numbers	7
Joint angle sensor	12-bit 360° magnetic encoder
Servo torque	30KG.CM @12V, 20KG·CM @ 12V (EoAT)
Joint feedback information	servo status, joint angle, rotation speed, joint load, servo voltage, servo current, servo temperature and servo working mode
Main control	ESP32-WROOM-32
Main control module features	WiFi, BT, Dual Core, 240MHz
Wireless control mode	2.4G-WiFi, ESP-NOW
Wired control mode	USB, UART
Manual operation mode	WEB control interface
Host operation mode	UART / USB / WEB commands in JSON data format
Host support	USB connection devices such as Raspberry Pi, Jetson Orin Nano, and PC.
EoAT function	clamp function by default, can be changed as an additional degree of freedom
LED power	≤1.5W
OLED screen size	0.91inch
Other functions	2-ch 12V power supply switch, 9-DOF IMU
Robotic arm weight	RoArm-M3-S: 973.5±15g RoArm-M3-Pro: 1020.8g±15g (Not including the weight of the table edge fixing clamp)
Table edge fixing clamp weight	290±10g
Supported table edge thickness of the clamp	72mm
Demo	3D Cartesian coordinate system control (inverse kinematics control); Dynamic external force adaptive control; Joint angle control; Operating information feedback; FLASH files system operation; Steps recording and replaying; ESP-NOW control; Leading-Following mode (Hand guiding control); LED control; 12V power supply ON/OFF control; WiFi function settings; Set startup tasks; Serial bus servo settings; Feedback mode setting, etc. (Note: Please refer to the WIKI for more details)

Product & Packaging Show

Dimensions

1. General Shipping Information

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🚀 Need Faster Shipping?

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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:

Åland Islands, Andorra, Austria, Belgium, Bosnia & Herzegovina, Bulgaria, Croatia, Czechia, Denmark, Estonia, Faroe Islands, Finland, France, Gibraltar, Greece, Guernsey, Hungary, Ireland, Isle of Man, Italy, Jersey, Latvia, Lithuania, Luxembourg, Malta, Moldova, Monaco, Montenegro, Netherlands, North Macedonia, Poland, Portugal, Romania, San Marino, Serbia, Slovakia, Slovenia, Spain, Svalbard & Jan Mayen, Sweden.*

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	€4.95	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
Non-Continental U.S. (AK, HI, PR, etc.)	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

Important Notice:

Inventory Status: Please check the inventory status on the product page. Our system displays real-time stock for our Munich and Long Beach warehouses. If an item is out of stock in these locations, it will be marked as "Pre-order". You can still place an order for these items.
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Split Shipments: If your order contains both in-stock and Pre-order items, we will prioritize shipping the in-stock items from the local warehouse immediately. The remaining Pre-order items will be sent to you in a separate shipment once they are ready.

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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.

Important Exception for Non-EU Countries (e.g., Switzerland, Norway):
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