WSAL22414 – ST3215 Servo/en

Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

Summary

The ST3215 is a programmable serial bus servo with a 360° magnetic encoder, two-way feedback and switchable operating modes. It suits robotics applications requiring closed-loop control.

Related products at JW Tech

WSAL22414 – ST3215 Series Serial Bus Servo, High precision and torque, 360 Degrees Magnetic Encoder, Two-way Feedback, Servo/Motor Mode Switchable, Options For 30kg.cm@12V / 19.5kg.cm@7.4V Torque
WSAL33014 – ST3215 Series Serial Bus Servo, High precision and torque, 360 Degrees Magnetic Encoder, Two-way Feedback, Servo/Motor Mode Switchable, Options For 30kg.cm@12V / 19.5kg.cm@7.4V Torque

Technical overview

Input voltage: 6–12.6 V; 12 V via the DC port (5.5 × 2.1 mm) is recommended.
Servo mode allows 360° absolute angle control; motor mode enables continuous rotation.
Position sensor resolution: 360°/4096 steps; serial interface baud rate: 1 Mbps.
Up to 253 servos can be connected on the same bus; each servo reports position, load, speed and input-voltage feedback.
ID range: 0–253; factory default ID is 1. Each ID must be unique per bus to avoid conflicts.
Torque options: up to 30 kg·cm @ 12 V or 19.5 kg·cm @ 7.4 V depending on variant.
Connector: 5264/2.54 3P; communication is half-duplex.
High-resolution magnetic encoder provides precise absolute angle measurement without mechanical end stops.

Notes and version constraints

When changing a servo ID, the EPROM area must be unlocked before saving; otherwise changes are lost after power cycling.
Oversized mounting screws that contact the servo housing increase current draw significantly and can burn out the servo.
Multiple servos on the same driver board must have unique IDs; the factory default (all ID 1) causes bus conflicts.
The stated life figure (>100,000 cycles) comes from reliability testing; specific warranty or certification details are not provided in the source.
The 7.4 V figure for the lower-torque variant should be verified against the datasheet before deployment.

Source and revision record

ST3215 Servo - Waveshare Wiki
Source revision: 111151
Captured: 2026-09-03T03:59:24+00:00
SHA-256: 57c4f9e2c8b661650f57dab6c4b09f60ea63905ca12908145d3f137dbfa69043