Feature

【Note】

From China warehouse to the United States, choose "US Direct Group Shipping" to enjoy duty-free！

6 Degree-of- Freedom(DOF) Arm — Six STS3215 magnetic-encoder bus servos deliver 30 kg·cm torque per joint with 12-bit absolute position feedback for smooth, quiet, and repeatable motion
Hugging Face LeRobot Native Support — Works out of the box with the LeRobot framework for imitation learning; collect teleoperation data and train ACT/Diffusion models with community-shared pipelines.
Affordable & Flexible Kit Options — Low‑cost 3D‑printable robotic arm with flexible kit options. Select full‑assembly, servo‑only pack or unassembled parts to match your budget and project needs.
Fully Open-Source — All hardware designs, BOM, firmware, and software are publicly available; modify, extend, and share freely

One‑Stop Guided Setup & Cloud‑Powered Robot AI Training

SenseCraft Robotics is an in‑house developed, exclusive platform from Seeed Studio. It delivers an all‑in‑one robot‑AI workflow featuring guided setup, cloud training and lightweight local validation. It lets you finish essential pre‑training steps — device pairing, serial binding, camera binding, calibration check and teleoperation check — all in one place, greatly streamlining your setup for education labs, R&D PoCs and early‑stage robot validation projects.

Specification

Arm Type	SO-ARM101
	Leader Arm	Follower Arm
Motor Configuration	1 × 7.4 V motor, 1:345 gear ratio — Joint 2	12x (12V) 1:345 gear ratio motors for all joints
	2 × 7.4 V motors, 1:191 gear ratio — Joints 1 & 3
	3 × 7.4 V motors, 1:147 gear ratio — Joints 4 & 5 & Gripper
Power Supply	DC 5V3A	DC 12V2A
DoF	5+1
Payload	500g
Angle sensor	12-bit magnetic encoder
Operating Temperature Range	0℃～40℃
Communication Method	UART
Control Method	PC

What’s inside each kit?

Which Kit Is Right For You?

	SO-ARM101 Pro Servo Motor Kit	SO-ARM101 Pro Unassembled Bundle	SO-ARM101 Pro Kit
Price	$189.00	$295.00	$299.00
Assembly	Structural parts to be 3D‑printed by user	Assembly from cratch	Pre-assembled
USB Camera	Excluded	Excluded	Included
Best For	Users with existing 3D-printed frames or custom enclosures	Hobbyists who enjoy the build process and want a complete kit. Select accessories as you like.	Researchers, educators, and teams who want to skip the build and focus on AI
Time to First Experiment	8+ hours	2-3 hours	Under 30 minutes

Disclaimer

Seeed Studio only provides the hardware required for LeRobot.

For SO-ARM10x hardware , please refer to: TheRoboStudio for synchronized updates.

For software and tutorials, please follow: Huggingface/Lerobot.

Please promptly report the issue to the LeRobot platform or the LeRobot Discord channel.

Application

Leader‑Follower Teleoperation

Collect robot demonstration data easily via leader‑follower teleoperation, ready for imitation‑learning model training.

Imitation Learning & Reinforcement Learning

Teach your robot household‑style skills like folding clothes with human demos. Gather data via leader‑follower teleoperation, train imitation‑learning policies on LeRobot, and watch your robot reproduce tricky real‑world manipulation tasks.

SO-ARM101 works seamlessly with LeRobot for data collection, simulation, training, and deployment. Train and deploy custom grasp-and-place policies quickly on NVIDIA Jetson edge devices.

Explore the tutorial: LeRobot on NVIDIA Jetson AI Lab

Community Inspiration

Follow Nikodem Bartnik’s hands‑on SO‑ARM101 workflow: hardware assembly, servo control, custom policy training and real‑time block‑picking inference. Walk through key steps, fix typical issues and explore the open‑source arm’s potential.

Our monthly project call is now open! Share your project demos for a chance to win prizes and discount coupons.

Quick Start Developer Resources

Jumpstart your project with official tutorials, open-source repositories, and community support:

Start building your first Physical AI Project in 30 mins with SenseCraft
Step-by-Step Guide: SO-ARM 101 Quick Start
Open-Source Code: Access PyTorch models, simulation tools, and datasets on the Hugging Face LeRobot GitHub Repository
Community & Support: Join discussions, share models, and get real-time help on the Seeed Discord Channel & FaceBook. Join our Facebook Group to claim exclusive coupons worth up to $100 USD.

FAQ

What if I want to modify the hardware design?

The SO-ARM101 is fully open-source. All 3D-printable structural files, the bill of materials, circuit schematics, and firmware are publicly available. You are free to modify, extend, and redistribute your changes.

Is the SO-ARM101 compatible with ROS?

LeRobot is the primary software stack and the recommended starting point. ROS integration is community-driven — several community members have built ROS 2 bridges for the STS3215 servos, but these are not officially maintained.

How is the SO-ARM101 different from the SO-ARM100?

The SO-ARM101 features improved internal cable routing (preventing the common joint-3 disconnection issue), redesigned bearing mounts that reduce backlash, and optimized leader arm motors with three different gear ratios for a more natural manual guidance feel. The SO-ARM100 is now considered deprecated in the official LeRobot documentation.

Can I deploy trained models without a laptop?

Yes. The LeRobot library runs on NVIDIA Jetson boards with JetPack + Ubuntu. Running inference on a Jetson allows autonomous, untethered operation — ideal for demos, deployments, and mobile setups.

Do I need two robotic arms for teleoperation?

Yes. The leader-follower teleoperation workflow requires two arms: one configured as the leader (moved by hand) and one as the follower (mirrors and records motion). A single kit is sufficient for scripted motion programming and servo debugging only.

Does the SO-ARM101 Pro Kit include a camera?

The pre-assembled version comes with a camera, while you need to add the camera as a separate selection for the DIY kit. The camera is not included and must be sourced separately. Any 720p or higher USB webcam is compatible with the official LeRobot tutorials. For dual-camera configurations, please use two cameras from different manufacturers, as identical models may trigger USB path reassignment issues and crash the data recorder.

What computer do I need to run LeRobot?

Any laptop or desktop running Ubuntu, macOS, or Windows with Python 3.10+. An NVIDIA GPU significantly accelerates model training — a 52M-parameter ACT model trains in approximately 4 hours on a 12GB RTX 3080. CPU-only training is possible for smaller datasets but considerably slower.

SO-101 Servo Motor Kit – LeRobot Compatible 6DOF Robotic Arm

Name: SO-101 LeRobot 6-DOF arm Servo Motor Kit| Open-Source Robotics Kit for DIY Projects
SKU: 114993667
Rating: 4.48 (19 reviews)

SKU 114993667

Build your own imitation learning robotic arm with the optimized SO-101! Designed for LeRobot and Hugging Face, this open-source, low-cost, and DIY-friendly kit includes servo motors, an adapter board, and cables—perfect for robotics enthusiasts and developers. The motor-only version cuts costs dramatically and is ideal for makers who plan to 3D-print structural parts on their own.

Note: The Motor Kit does not include 3D-printed parts and camera.

SO-ARM101 Assembled Arm SO-ARM101 3D Printed Parts SO-ARM101 Unassembled Bundle SO-ARM101 Imitation Learning Kit SO-ARM101 Sim-to-Real Learning Kit SO-ARM101 Bimanual Robot Arm Kit

USD$249.90

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1 on 1 Support | 12-Month Warranty | 30-Day Return Policy

HSCODE	8501109990
USHSCODE	8501106080
UPC
EUHSCODE	8501109390
COO	CHINA

7.4v STS3215 Servo Motor 1:345 gear rate	x1
7.4v STS3215 Servo Motor 1:191 gear rate	x2
7.4v STS3215 Servo Motor 1:147 gear rate	x3
12v STS3215 Servo Motor 1:345 gear rate	x6
Servo Driver Board for LeRobot	x2
Stud	x8
Screw	x8
5V Power Supply Cable (Multiple head)	x1
12V Power Supply Cable (Multiple head)	x1
USB-C Cable	x2
DC Power Pigtail Cable	x2
Fixing clip	x4