ST3020 Serial Bus Servo (25kg)

WaveshareSKU: WAV-24703
Sale price £19
incl. VAT
excl. VAT
Only 4 units left

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This dual-axis serial bus servo offers high torque and has a 360° high-precision magnetic encoder for accurate angle control within a 360° range, providing an angle resolution of up to 0.088°. Programmable control allows setting any angle as the servo's middle position, and it can be toggled to continuous rotation mode, functioning as a motor or stepper motor.

Each servo is equipped with two interfaces for series connection, allowing the control of up to 253 bus servos simultaneously. Servos relay information on a current angle, load, voltage, mode, and other parameters. This servo is ideal for robotics projects requiring closed-loop control, including robotic arms, hexapod robots, humanoid robots, and wheeled robots.


  • Wide-range voltage input, support 6-14V DC current input, and can be directly powered by 2S or 3S Lithium batteries.
  • Large torque, up to`
  • Can be used in series to control up to 253 servos simultaneously (sufficient power is required) and get feedback from each servo.
  • 360° magnetic encoder with wider angle control range.
  • High precision, the angle control precision is up to 360°/4096.
  • The middle position can be set at any angle, facilitating assembly.
  • The acceleration and deceleration functions provide smoother motion effects.
  • The compact structural design enhances the product's aesthetics.
  • The working mode can be programmatically set to either servo mode for angle control or motor mode for continuous rotation


Rotation Angle 360° (0~4095)
Position Sensor Resolution 0.088° (360°/4096)
Mechanism Limit Angle No Limit
Working Voltage 6 ~ 14 V (typ. 12V)
Gear High-precision metal gear
No-Load Speed 0.167sec/60° (60RPM) @12V
Encoder Type 12 Bits magnetic encoder
ID Range 1 ~ 253
Baudrate 38400bps ~ 1Mbps (1Mbps by default)
Feedback Position, Load, Speed, Input Voltage, Current, Temperature
No-Load Current 200mA@12V
Locked-Rotor Current 2.7A@12V


Package Contents

  • 1x 25kg Serial Bus Servo
  • Screws
  • Aluminium Servo Wheels
  • Servo Cable
  • 3-pin Cable

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