Robot arms

NexArm

An ESP32 and AT32 robot arm for embodied AI, with K230 vision and large AI models from the Advanced Kit.

ESP32
Arduino
Suggested for secondary
Suggested for university

NexArm is an open-source robot arm for embodied AI and VLA (vision-language-action) learning, built on an ESP32 and AT32 dual-chip design with magnetic encoder bus servos. It comes in Starter, Standard, Advanced and Ultimate kits. Every kit covers coordinate control, trajectory planning, control from the app or PC software, and wireless control of several arms. The Advanced and Ultimate kits add the K230 AI vision module, for vision recognition, grasping and sorting and for large AI model applications. The Ultimate Kit adds a leader arm, for leader-follower teleoperation and imitation learning with Hugging Face LeRobot. A mecanum chassis, a sliding rail and a conveyor belt are offered as add-ons.

Zeta42 is an authorised Hiwonder partner in the Middle East.

Configurations

Choose how it ships.

Model: Starter Kit · Standard Kit · Advanced Kit · Ultimate Kit
Accessory: No Extra Accessories · + NexArm (Leader Arm) · +Suspension Mecanum Chassis · +Sliding Rail · +Conveyor Belt

What it does

Built for.

Magnetic encoder bus servos
Each joint uses a dual-output-shaft magnetic encoder servo with all-metal gears, and real-time feedback keeps the movement precise and stable.
Coordinates and inverse kinematics
Every kit supports coordinate control and trajectory planning. With the vision module, NexArm locates a target, works out its position and angle, and adjusts each joint through inverse kinematics to grasp it.
K230 vision (Advanced and Ultimate Kit)
The K230 module has 6 TOPS of computing power and more than 30 AI vision functions, including YOLO: colour, face and gesture recognition, and waste card sorting with deep learning.
Large AI models (Advanced and Ultimate Kit)
With a large vision model, NexArm tracks any object in view, breaks a complex spoken command into handling tasks, answers questions about the scene and sorts items on instruction.
Leader-follower and LeRobot (Ultimate Kit)
The Ultimate Kit adds a leader arm, cameras and a camera mount: drag the leader by hand and the follower reproduces the motion. The system works with the Hugging Face LeRobot framework, from data collection to imitation learning and deployment. The leader arm is also offered as an add-on.
Control and add-ons
Drive NexArm from the app or PC software, or with a PS3 wireless controller (included in the Ultimate Kit), and link several arms wirelessly. It also works with a suspension mecanum chassis, a sliding rail and a conveyor belt.

Where it is used

Applications.

Upper secondary and university courses in embodied AI
Vision-guided grasping and sorting (Advanced and Ultimate Kit)
Imitation learning with Hugging Face LeRobot (Ultimate Kit)
Model production lines with a chassis, sliding rail or conveyor belt

Videos

See it run.

Specifications

The full sheet.

Material: Metal frame
Follower arm: 111 × 111 × 614 mm, 1.3 kg
Leader arm (Ultimate Kit or add-on): 111 × 216 × 619 mm, 1.2 kg
Follower arm servos: HX-12H × 2 + HX-30HM × 3 + HX-65HM × 1
Leader arm servos (Ultimate Kit or add-on): HX-10HM × 5 + HX-12H × 1
Controller: NexArm follower arm controller; NexArm leader arm controller (Ultimate Kit or add-on)
Vision module (Advanced and Ultimate Kit): K230, 6 TOPS
Vision module camera and screen (Advanced and Ultimate Kit): 2 MP HD camera, 2.4-inch LCD touchscreen
Power supply: 12V 5A DC (5.5 × 2.5)
Operating system: Windows / Linux / macOS
Control method: USB serial / Bluetooth / Wi-Fi
Programming tool: Arduino IDE
Package size: 345 × 158 × 220 mm (Starter, Standard and Advanced Kit); 487 × 290 × 195 mm (Ultimate Kit)