Waveshare RoArm-M2-S 4-DOF ESP32 Desktop Robotic Arm

by Waveshare

★ Best for: A wireless desk-top arm for tool or camera work

A light, wireless 4-DOF desktop arm with high-torque bus servos and an ESP32 controller.

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Why we recommend it

RoArm-M2-S is a 4-DOF desktop arm built around high-torque serial bus servos and an onboard ESP32, with wireless control and room for secondary development. The listing quotes an effective payload of 0.5 kg at 0.5 m and a total weight under 850 g — a useful combination for a desk-top arm that has to carry a tool or camera rather than a pen. Four axes position the tool but don't give full orientation control; if your task needs the gripper to approach from arbitrary angles, read our 4-DOF vs 6-DOF guide before choosing.

At a glance

Degrees of freedom	4
Controller	ESP32
Servos	High-torque serial bus servos
Payload	0.5 kg @ 0.5 m (per listing)
Weight	Under 850 g

Waveshare RoArm-M2-S 4-DOF ESP32 Desktop Robotic Arm

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Guides that use this

Parts & hardware

Best Robotic Arm Kits (2026): 12 Kits Compared for Adults, Students & Beginners

12 robotic arm kits compared — DOF, controller, servos and who each suits — from kids' STEM kits to ROS2 and Jetson arms, plus how to choose one by budget and goal.

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Builds by platform

ESP32 Robotic Arm: Wi-Fi Servo Control (Wiring + Code Plan)

Build an ESP32 robotic arm with wireless control. Why the ESP32 suits robot arms, how to wire it to a PCA9685 and servos, power tips, and a web/BLE control plan.

◆ Intermediate Read →

The concepts

4 DOF vs 6 DOF Robotic Arm: Which Build Makes Sense?

4 DOF vs 6 DOF robotic arm compared — the real difference in reach, control, cost and code, and a clear recommendation for which one to build first.

◆ Beginner Read →

The concepts

Robotic Arm Reach & Payload: What the Specs Actually Mean

What robotic arm reach and payload specs mean, how to calculate if an arm is strong enough for your task, and why servo torque ratings are often misleading.

◆ Beginner Read →