web3215

Configure ST3215 servos from your browser.

web3215 talks to ST3215-type robotics servos through a tiny USB adapter built on a Raspberry Pi Pico. Discover what's on the bus, read and edit the control table, and watch live telemetry — no vendor software, no driver install.

Plug in the adapter

A Pico running the rp2 firmware bridges USB to the half-duplex servo bus.

Scan the bus

Discover every servo, its ID, model, and firmware in one pass.

Tune & test

Edit IDs, limits, and PID gains; jog positions; watch load and temperature live.

Use cases

Configure however suits the deployment; run in whatever topology fits the rig.

Three ways to configure

Browser (WebHID)

Open /console, click around. Full control: topology, roles, WiFi, motion sequencer. The browser runs PBKDF2 client-side so the firmware never sees your passphrase.

Soft-AP captive portal

First boot with no WiFi creds? A Pico W hosts its own access point with an embedded HTTP form. Connect, type SSID + password, submit.

USB drive (factory mode)

Enable factory mode and the adapter exposes a tiny FAT12 drive with CONFIG.JSN. Edit, save, reboot — settings applied. No browser, no app, just a text editor.

Three ways to run

USB-CDC servo bridge

Always on. A transparent byte pipe between host and the half-duplex servo bus. Any SDK speaking STS or Dynamixel-1.0 works unchanged.

Local mirror

One Pico, two roles on the same bus: read PRESENT_POSITION from the leader IDs, SYNC_WRITE to the follower IDs. Teleop on a single unit, no network needed.

Networked mirror

Leader publishes joints over a Phoenix channel; followers subscribe and apply. Payloads are self-describing [bus_id, servo_id, position], so devices mix topologies cleanly.

Multi-bus

One Pico drives up to 4 independent servo buses; each shows up as its own USB-CDC port and runs an independent role. The USB descriptor is composed at boot to match the programmed topology.

Open the servo console → Flash adapter firmware View live SBUS

The console, flasher, and SBUS viewer run entirely in your browser (WebSerial / WebUSB, Chromium-only). The control-table editor and live telemetry views are coming. Page views are recorded with a daily-rotating hash in our own database — no third-party trackers, no cookies, your IP is never stored.