IBIS Tracker Overview

The IBIS tracker (currently shipping as Ibis 2.0, 2026 revision with a physical button) is VYRO VR’s SlimeVR-compatible full-body tracker. This page is a quick reference; deeper instructions live under the section pages.

Specs

Weight	~11 g
Height	< 8 mm
Battery	120 mAh lithium-polymer (401230 cell)
Battery life	30–50 hours with constant movement; 50+ typical for social play; up to ~70 hours possible
IMU	ST LSM6DSV
Microcontroller	Nordic nRF52833
Wireless	2.4 GHz nRF (“Smol Slime” protocol) via the included USB receiver; range roughly 10 m / your playspace
Charging	USB-C, 5 V; via the 10-port charging dock or any USB-C cable
Auto-sleep	After ~15 minutes without movement
Drift / reset interval	Around an hour when walking and socialising; every ~10 minutes when dancing hard
Firmware	SlimeVR nRF tracker firmware (open source)

Controls

There is one button on the tracker — the small oval on the top face, which also carries the LED. Different press counts do different things.

Action	Result
1 press	Power on (when off) / reset (when already on)
2 presses	Side calibration — IMU calibration on a flat surface, see below
3 presses	Enter pairing mode (LED flashes blue once per second)
4–5 presses	Enter DFU (firmware-update) mode — avoid unless intentional
Hold	Power off

Caution

The button behavior above matches VYRO VR’s current shipping firmware. Generic Smol Slime firmware maps the button differently (hold for pairing, 4 presses for DFU), so if you flashed a non-VYRO build the counts may not match. Check the Discord if in doubt — and let us know so we can update this page.

Side calibration (2 presses)

Side calibration zeroes the gyroscope bias, which is the main source of slow drift. It is not mounting calibration — it doesn’t care where the tracker is on your body.

1. Take the tracker off and press the button twice.
2. Set it down on a flat, still surface within a couple of seconds.
3. The LED cycles through rainbow colours while it calibrates and stops when it’s done (older firmware: one flash → solid → 4 rapid flashes).
4. Pick it up and carry on.

Do this if one tracker drifts noticeably faster than the rest. Trackers ship calibrated, so most people never need it.

LED at a glance

LED behavior	Meaning
Comes on after a single press	Powered on
Short purple flash	Reset sent (single press while on)
Flashing blue once per second	Pairing mode (3 presses)
Rainbow cycling	Side calibration running
Solid then fades out (or just fades out) when you hold the button	Powering off (which one you see depends on firmware)
Slow fade / pulse plus a USB drive appearing on your PC	DFU mode

Full reference: LED Codes.

Where to go next

• First-time setup → Quick Start
• Pair / re-pair a tracker → Pairing
• Power and sleep behavior → Powering On & Off
• Full LED reference → LED Codes