by timhendriks93·Workflow
Images © timhendriks93. Used for product review; image policy.
Servo Animation earns its place in the blender_extensions library by bridging armature-based animation and physical servo control, from file export to a real-time live mode over Serial or Web socket. Version 2.1.1 fixed a recursion error when changing position min/max and neutral angle.
Servo Animation connects Blender's animation tools to physical servo hardware. It represents servos through armature bones and lets you configure individual Servo Settings per bone, then exports an animation as servo position values. Those values can be used with an Arduino-compatible microcontroller to move PWM-driven servos according to your animation.
Beyond file export, the add-on includes a live mode that sends position values in real-time over a connection. It supports Serial (UART/USB) and Web socket (TCP), and works with Inverse Kinematics (IK) rigs.
When you click somewhere in the timeline and jump to a different frame, the add-on first calculates all position value differences. If a difference exceeds the Threshold value of the respective servos, those servos are moved slowly to their new target position by sending multiple position values in small increments, with a progress indicator shown in the interface during the process.
Servo Animation is best for blender users driving PWM servos from armature-based animation through an Arduino-compatible microcontroller.
Servo Animation is completely free to download and use.
Servo Animation is compatible with Blender 4.2 LTS and newer, so recent long-term-support releases and later builds are covered. The current version is 2.1.1, published in January 2025. You can add it by dragging the downloaded archive into Blender or by using Install from Disk in the extension preferences. Because it targets the extensions system, Blender releases below 4.2 are not listed as supported, so plan to run a 4.2 LTS or newer build before installing it.
Servo Animation can send servo position values to hardware through a live mode connection that operates in real-time. It supports two connection types: Serial (UART/USB) and Web socket (TCP). The exported position values are meant for use with an Arduino-compatible microcontroller, which drives PWM servos according to your animation. When you jump to a different frame in the timeline, the add-on calculates position value differences and, where a difference exceeds a servo's Threshold, moves that servo gradually in small increments while showing a progress indicator.
Servo Animation is released under the GNU General Public License v3.0 or later, and its source code is hosted on the developer's GitHub repository. It is listed as free in this catalog; for current licensing terms, check the developer's page. The extension also notes that it does not require any special permissions within Blender. If you run into a problem, the developer maintains an issues tracker on the same GitHub project where you can report it.
Servo Animation can be added to Blender by dragging the downloaded add-on archive directly into the application, or by using the Install from Disk option in Blender's extension preferences. It targets Blender 4.2 LTS and newer, so confirm you are running a compatible build first. The download is a compact archive of around 157 KB. Once installed, you set up servos through armature bones and individual Servo Settings before exporting values or using live mode.
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