UART Bus Servo · Serial Motion Control

Compare UART bus servo motors with 360° continuous rotation, position feedback and status monitoring. Filter models by voltage, torque, motor type and dimensions, then review pricing, availability and development resources.

7.4V and 12V models1.18–9.80 N·mBrushless · Coreless · Cored
Compare UART ModelsView UART Documentation
RX18-U100H-M UART servo100 kg class
HX8-U45H-M UART servo45 kg class
RX6-U12H-M compact UART servo12 kg class
Core Features

UART Bus Servo Control for Compact Robotics

The official UART documentation covers serial commands, ID configuration, control modes, feedback data, SDKs and code examples.

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UART Serial Control

Use documented UART protocol commands instead of a simple PWM control signal.

ID

ID Configuration

Configure addressed servos using the ID resources provided in the UART Wiki.

360°

Continuous Rotation

The Store collection highlights 360° continuous rotation across the UART range.

↺

Position Control

Use the documented control modes for servo positioning and motion workflows.

DATA

Feedback & Status

Review feedback data and status-monitoring resources in the official documentation.

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SDKs & Examples

Access SDKs, code examples, APIs and software resources for development.

UART Model Range

UART Bus Servo Models from 12 kg to 100 kg

The official Wiki organizes the current UART range into nine documented torque and motor groups. Use the Store to compare voltage, torque, configuration, price and availability.

12 kgBrushless

Compact 12 kg

33.5 × 21 × 23.4 mm35 g

RX6-U12H-M · 12V · 1.18 N·m

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15 kgCoreless

Lightweight 15 kg

31.5 × 21 × 27.6 mm42 g

HP6-U15H-M · RP6-U15H-M
12V · 1.47 N·m

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25 kgCored

Full-Metal Gear 25 kg

40 × 20 × 40 mm65 g

HA8 / RA8-U25-M & U25H-M
7.4V / 12V · 2.45 N·m

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26 kgBrushless

Stainless Gear 26 kg

40 × 20 × 40 mm78 g

HX8-U26H-M · RX8-U26H-M
12V · 2.55 N·m

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28 kgBrushless

All-Metal 28 kg

40 × 20 × 40 mm86 g

HX8 / RX8-U28H-M & U29H-M
12V · 2.74 N·m

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35 kgCored

Aluminum Gear 35 kg

40 × 20 × 40 mm55 g

HA8 / RA8-U35-M & U35H-M
7.4V / 12V · 3.43 N·m

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45 kgBrushless

Stainless Gear 45 kg

40 × 20 × 40 mm78 g

HX8-U45H-M · RX8-U45H-M
12V · 4.41 N·m

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50 kgBrushless

All-Metal 50 kg

40 × 20 × 40 mm86 g

HX8 / RX8-U50H-M & U51H-M

View Datasheets
100 kgBrushless

High-Torque 100 kg

63 × 34 × 47 mm230 / 260 g

RX18-U100H-M · RX18-U101H-M
12V · up to 9.80 N·m

View Model
Compare All UART Models
Protocol Comparison

When Should You Choose a UART Bus Servo?

Compare UART with RS-485, CAN Bus and PWM by development path, wiring scenario, network use and feedback.

Selection factorUARTRS-485CANPWM
Control signal / busUART serial; UC-01 converts TX/RX to one half-duplex S signalRS-485 differential A/B pairCAN bus; CANBUS and UAVCANStandard PWM pulse-width signal (20 ms period)
Wiring approachShared signal line plus power; short-distance integrationShared A/B differential pair plus power; suited to longer runsShared CAN bus plus power; distributed nodesOne PWM control signal per servo plus power
Feedback & controlAngle, temperature, voltage, current, power and status feedback; closed-loop controlAngle, temperature, voltage, current, power and status feedback; closed-loop controlAngle, temperature, voltage, current, power and status feedbackNo data feedback; no closed-loop control
Built-in control functionsSingle-/multi-turn position, damping, synchronous and asynchronous commandsSingle-/multi-turn position, damping, synchronous and asynchronous commandsReal-time CAN control and status communicationPosition command by pulse width; protection parameters configurable
Communication strengthsSimple development and compact wiringStrong noise immunity and long-distance differential communicationHigh real-time performance, robust interference resistance and multi-node networkingSimple, familiar controller interface
Best-fit applicationsEducation, research, robot joints and short-distance systems needing monitoringIndustrial, medical and research systems needing long-distance, noise-resistant controlUAVs, AGVs, autonomous platforms and reliable mobile robotsEducation, RC models, vehicles/boats and cost-sensitive applications without feedback

Choose UART when you want documented serial commands, ID configuration, feedback data and a direct development path for compact robotics.

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Applications / Solutions

UART Servo Applications for Robotics Development

Application categories already published on the UART page, presented with the shared Bus Servo Hub visual system.

UART robotic arm application
Robotic Arm

Robotic Arms

Position-control and feedback workflows for articulated mechanisms.

UART humanoid robot application
Humanoid

Humanoid Robots

Multi-servo motion for compact humanoid development.

UART robotic hand application
Dexterous Hand

Robotic Hands

Compact actuator options for articulated hand prototypes.

UART education application
Education

STEM Education

Serial-control learning with supported development platforms.

UART prototype application
Prototype

Rapid Prototyping

SDKs and code examples for robotics development workflows.

UART compact automation application
Compact Automation

Compact Automation

Addressed serial control for small machines and multi-axis learning rigs.

SDK & Platform Support

Develop with the Platforms You Already Use

Use the shared Fashion Star development ecosystem, with UART-specific wiring, commands and examples in the official Wiki.

Arduino
STM32
ESP32
Raspberry Pi
Python
ROS / ROS2
Jetson
C++ / MATLAB

Find SDKs, code examples, APIs and software resources through the Fashion Star Wiki.

Resources

Documentation and Engineering Resources

Open UART wiring guides, protocol commands, ID configuration, feedback data, SDKs and mechanical resources.

📘

User Manual

Read UART wiring, setup and model documentation.

💻

SDK

Access SDKs and development examples.

🔌

API

Review protocol commands and feedback data.

📐

CAD Files

Open CAD and 3D model resources.

🧰

PC Software

Access software and configuration tools.

❓

Wiki / FAQ

Browse UART documentation and troubleshooting resources.

Choose, Buy and Integrate UART Servos

Compare current UART models in the Store, then use the official Wiki for wiring, IDs, commands, feedback and SDK resources.

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FAQ

UART Bus Servo FAQ

Answers are limited to information published in the UART Store collection and official UART Wiki.

What is a UART bus servo?

A UART bus servo uses serial protocol commands and supports documented ID configuration, control modes and feedback data instead of relying only on a simple PWM command.

What voltage and torque options are available?

The Store currently provides 6.0–8.4V and 9.0–12.6V filter ranges. Listed models span 7.4V and 12V classes, while the official Wiki documents groups from 12 kg through 100 kg.

What motor types are available?

The current UART collection provides Brushless, Coreless and Cored motor filters. The official Wiki identifies the motor type for each documented product group.

Does the UART range support feedback?

The Store highlights position feedback and status monitoring, while the official Wiki provides feedback data and command references for implementation.

Where can I find IDs, commands and control modes?

Use the official UART Wiki for wiring guides, protocol commands, ID configuration, control modes, SDKs and code examples.

Where can I compare current UART servo models?

The UART Store collection provides model voltage, torque, weight, motor type, dimensions, price and availability across its product pages.

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