Open-Source Snake Robot With ROS Control and Seven Dynamixel Joints

A snake robot produces locomotion by coordinating joint angles over time. Each servo contributes one segment of the body curve, and the complete sequence creates lateral waves, turns or posture changes.

With seven degrees of freedom, the project is complex enough to study gait timing and body coordination while remaining small enough for researchers to inspect and modify every joint command.

The repository specifies Robotis Dynamixel MX-28AR actuators. Dynamixel devices integrate a motor, gearbox, controller and communication interface, allowing software to command position and read operating data through a shared bus.

That integration reduces wiring and low-level electronics work compared with building each joint controller from separate components. Mechanical loads, heat and supply quality still determine whether the actuators can sustain a chosen gait.

The software stack uses ROS Kinetic and ROS Control on Ubuntu 16.04. ROS Control separates higher-level controllers from the hardware interface, so joint commands can be generated through established controller patterns rather than custom serial code in every experiment.

The environment is now an older ROS distribution. Reusing the project today may require preserving a compatible machine or porting the interfaces and dependencies to a newer ROS release.

The GitHub project exposes the package structure and hardware assumptions, allowing researchers to study how the joints are addressed and how commands reach the servo chain. This is more reproducible than a video without code.

Open source does not guarantee a complete build guide, current dependency support or identical performance with substitute parts. Builders still need to verify power delivery, mechanical dimensions, bus configuration and safe joint limits.

The associated post presents the machine as working in water, but the repository does not document an ingress-protection rating for the assembled robot. A device can move near or briefly contact water without being designed for sustained submersion.

A true underwater version needs sealed housings, cable glands, pressure-tolerant joints, corrosion-resistant materials and a plan for heat dissipation. Every connector and rotating interface becomes a potential leak path.

Its strongest verified value is the combination of a seven-joint body, addressable smart servos and a ROS Control software path. That supports experiments in gait generation, coordinated motion and modular robot design.

Underwater capability should be tested and documented separately with depth, duration, sealing method and failure inspection. Until that evidence exists, the public code supports the snake-robot claim, not a certified underwater robot claim.