Betabot: Improving page with detailed specifications, history, features, and references

2026-01-08T03:12:26Z

Improving page with detailed specifications, history, features, and references

New page

{{Device Infobox
|name = SlimeVR Full-Body Tracker
|image =
|VR/AR = [[Virtual Reality]]
|Type = [[Body Tracking System]]
|Subtype = [[IMU Tracking]], [[DIY VR]]
|Platform = Windows, Linux, macOS, Android, iOS
|Creator = [[SlimeVR]]
|Developer = [[SlimeVR]] (Open Source Community)
|Manufacturer = [[SlimeVR]] / DIY
|Announcement Date = 2021
|Release Date = 2022 (Crowd Supply)
|Price = $80-$200 (DIY), Official kits available
|Website = https://slimevr.dev/
|Versions = SlimeVR Official, SlimeVR DIY
|Requires = VR headset (as reference), Wi-Fi network
|Predecessor = None
|Successor = SlimeVR v1.2 (ICM-45686 IMU)
|Operating System = Windows, Linux, macOS, Android, iOS
|Chipset = ESP8266/ESP32 microcontroller
|CPU = ESP8266 or ESP32
|GPU = N/A
|HPU =
|Storage = N/A
|Memory = N/A
|SD Card Slot = No
|Display = N/A (tracking device)
|Subpixel Layout = N/A
|Peak Brightness = N/A
|Resolution = N/A
|Pixel Density = N/A
|Refresh Rate = 100Hz tracking
|Persistence = N/A
|Field of View = N/A
|Horizontal FoV = N/A
|Vertical FoV = N/A
|Average Pixel Density = N/A
|Peak Pixel Density = N/A
|Foveated Rendering = N/A
|Optics = N/A
|Ocularity = N/A
|IPD Range = N/A
|Adjustable Diopter = N/A
|Passthrough = N/A
|Tracking = Inertial (IMU-based)
|Tracking Frequency = 100Hz
|Base Stations = None required
|Eye Tracking = N/A
|Face Tracking = N/A
|Hand Tracking = N/A
|Body Tracking = Yes (primary function)
|Rotational Tracking = Yes (absolute)
|Positional Tracking = Derived from headset
|Update Rate = 100Hz
|Tracking Volume = Any (no base stations)
|Play Space = Any environment
|Latency = Low latency Wi-Fi
|Audio = N/A
|Microphone = N/A
|3.5mm Audio Jack = N/A
|Camera = None
|Connectivity = Wi-Fi (2.4GHz)
|Ports = USB Type-C (charging)
|Wired Video = N/A
|Wireless Video = N/A
|WiFi = Yes (2.4GHz)
|Bluetooth = N/A
|Power = 3.7V LiPo battery
|Battery Capacity = 1,000-1,200mAh typical
|Battery Life = 10-15 hours
|Charge Time = USB Type-C
|Dimensions = Compact DIY design
|Weight = ~40g each
|Material = 3D printed/custom enclosure
|Headstrap = N/A (straps available)
|Haptics = N/A
|Color = Various (DIY)
|Sensors = IMU (BNO085, ICM-45686, or similar)
|Input = Body position tracking
|Compliance = Open source hardware
}}

'''SlimeVR''' is an open-source [[full-body tracking]] system that uses wireless IMU (Inertial Measurement Unit) sensors to track body movement for [[virtual reality]], VTubing, and motion capture applications. Unlike SteamVR-based trackers that require expensive base stations, SlimeVR trackers communicate via Wi-Fi to a server application running on PC or smartphone, using the VR headset as a spatial reference point to calculate body positions—requiring no cameras, base stations, or line-of-sight. Each tracker tracks its absolute rotation using an IMU, with a minimum of five trackers (chest, both thighs, both ankles) enabling accurate full-body tracking. Available as official pre-built units through Crowd Supply or as DIY kits for approximately $80-$200, SlimeVR uses ESP8266 or ESP32 microcontrollers paired with IMU sensors like the BNO085 (v1.0/v1.1) or ICM-45686 (v1.2). The trackers operate at 100Hz refresh rate with 10-15+ hours of battery life from standard 3.7V LiPo batteries, charged via USB Type-C. SlimeVR Server software is compatible with Windows, Linux, macOS, Android, and iOS, with direct integration to SteamVR and support for standalone Quest headsets. The open-source nature enables extensive community customization, with detailed documentation for DIY builds. While IMU-based tracking experiences gradual rotational drift (correctable with a double-tap reset), SlimeVR provides an affordable, accessible full-body tracking solution that works anywhere—indoors, outdoors, or in small spaces—with a 2-year manufacturer warranty on official units.

== History and Development ==

=== Open Source Origins ===
Community project:
* Open hardware design
* Open source software
* Community-driven
* Collaborative development

=== Crowd Supply Campaign ===
Official launch:
* 2022 Crowd Supply
* Official hardware
* Manufacturing scale
* Global availability

=== Version Evolution ===
Hardware iterations:
* v1.0/v1.1: BNO085 IMU
* v1.2: ICM-45686 + QMC6309
* Continuous improvement
* IMU optimization

=== Community Growth ===
Ecosystem:
* DIY community
* Discord server
* Documentation wiki
* Shared designs

== Design Philosophy ==

=== No Base Stations ===
Accessibility:
* IMU-based tracking
* No external hardware
* Any environment
* Space-independent

=== Affordable Tracking ===
Cost priority:
* $80-$200 DIY
* Official kits available
* Fraction of SteamVR cost
* Democratized access

=== Open Source ===
Transparency:
* Open hardware designs
* Open software
* Community contributions
* Modifiable

=== DIY Friendly ===
Builder support:
* Component guides
* Build documentation
* Community help
* Customization

== How It Works ==

=== IMU Tracking ===
Core technology:
* Each tracker tracks absolute rotation
* 9-DOF IMU sensors
* Accelerometer + gyroscope + magnetometer
* Sensor fusion algorithms

=== Headset Reference ===
Position calculation:
* VR headset as spatial anchor
* Body proportions input
* Position derived from rotation
* Full body reconstruction

=== Wi-Fi Communication ===
Data transmission:
* 2.4GHz Wi-Fi to server
* SlimeVR Server application
* Real-time streaming
* Low latency

=== Body Reconstruction ===
Tracking computation:
* Combined tracker data
* User body proportions
* Inverse kinematics
* Avatar driving

== Tracker Hardware ==

=== Microcontroller ===
Processing:
* '''Primary''': ESP8266 (Wemos D1 Mini)
* '''Alternative''': ESP32
* Wi-Fi integrated
* Low cost

=== IMU Options ===
Sensor selection:
* '''Best''': BNO085 (recommended)
* '''v1.2''': ICM-45686 + QMC6309
* '''Budget''': BMI160
* '''Avoid''': MPU6050 (poor quality)

=== Battery ===
Power source:
* '''Type''': 3.7V LiPo
* '''Capacity''': 1,000-1,200mAh typical
* '''Life''': 10-15 hours
* '''Rule''': 100mAh ≈ 1 hour

=== Charging ===
Power management:
* USB Type-C
* TP4056 charging module (DIY)
* Battery protection
* Standard charging

== Tracker Configuration ==

=== Minimum Setup ===
5-tracker config:
* 1× Chest
* 2× Thighs
* 2× Ankles
* Basic full-body

=== Enhanced Setup ===
7-tracker config:
* 5× basic set
* + 2× Feet
* Improved foot tracking
* Better accuracy

=== Extended Setup ===
Additional trackers:
* Knees (optional)
* Elbows (optional)
* Hip (optional)
* Maximum fidelity

== Software ==

=== SlimeVR Server ===
Core application:
* Tracker management
* Calibration
* SteamVR integration
* Cross-platform

=== Platform Support ===
Operating systems:
* '''Windows''': 8, 8.1, 10, 11
* '''Linux''': Supported
* '''macOS''': Supported
* '''Android''': Supported
* '''iOS''': Supported

=== VR Integration ===
Headset support:
* SteamVR headsets
* Meta Quest (standalone)
* Pico headsets
* Most VR platforms

== Drift and Calibration ==

=== Drift Behavior ===
IMU characteristic:
* Gradual rotation drift
* 20-60 minutes between resets
* Activity dependent
* Normal IMU behavior

=== Reset Methods ===
Correction:
* Double-tap tracker
* Controller button press
* Quick recalibration
* Continuous use

=== Magnetometer ===
Drift reduction:
* Compass sensor
* Drift correction
* Environment dependent
* Magnetic interference sensitive

== DIY Build ==

=== Cost ===
Budget options:
* '''Complete set''': $80-$100 (DIY)
* '''Component sourcing''': AliExpress
* '''Quality IMUs''': Higher cost
* Significant savings

=== Official DIY Kit ===
Partial kit:
* Boards + extensions + cables
* No enclosures/straps/batteries
* Minimal soldering
* Tested boards

=== Full DIY ===
Complete build:
* Source all components
* 3D print enclosures
* Solder assembly
* Maximum customization

== Official vs DIY ==

=== Official SlimeVR ===
Pre-built option:
* Manufactured quality
* 2-year warranty
* Tested components
* Ready to use

=== DIY SlimeVR ===
Builder option:
* Lower cost
* Full customization
* Learning experience
* Community supported

== Comparison with Body Tracking ==

{| class="wikitable"
|-
! Feature !! SlimeVR !! Vive Tracker 3.0 !! Tundra Tracker !! Perception Neuron
|-
| Type || IMU-based || SteamVR optical || SteamVR optical || IMU mocap
|-
| Base Stations || No || Yes || Yes || No
|-
| Battery Life || 10-15 hours || 7.5 hours || 7 hours || 6+ hours
|-
| Drift || Yes (correctable) || No || No || Yes
|-
| Accuracy || Good || Sub-millimeter || Sub-millimeter || Professional
|-
| Environment || Any || Tracked space || Tracked space || Any
|-
| DIY Option || Yes || No || No || No
|-
| Price (5+) || ~$200 || ~$650+ || ~$500+ || ~$1,500+
|}

== Strengths and Limitations ==

=== Strengths ===
* No base stations required
* $80-$200 affordable (DIY)
* 10-15+ hours battery life
* Works anywhere (indoor/outdoor)
* Open source hardware/software
* Cross-platform (Windows/Linux/macOS/Android/iOS)
* SteamVR + Quest standalone support
* 100Hz tracking refresh rate
* 2-year warranty (official)
* Active community support
* DIY customization possible

=== Limitations ===
* IMU drift (requires periodic reset)
* Positional tracking derived (not absolute)
* Magnetic interference sensitivity
* DIY build complexity
* IMU quality varies by component choice
* Not as accurate as optical tracking
* Calibration learning curve
* Wi-Fi network required
* Headset required as reference

== Technical Specifications Summary ==

{| class="wikitable"
|-
! Specification !! Details
|-
| Type || IMU-based body tracking
|-
| Base Stations || Not required
|-
| Microcontroller || ESP8266/ESP32
|-
| IMU || BNO085, ICM-45686, or similar
|-
| Refresh Rate || 100Hz
|-
| Battery Life || 10-15+ hours
|-
| Battery Type || 3.7V LiPo (1,000-1,200mAh)
|-
| Connectivity || Wi-Fi 2.4GHz
|-
| Platforms || Windows, Linux, macOS, Android, iOS
|-
| Min Trackers || 5 (chest, thighs, ankles)
|-
| Price || $80-$200 (DIY), Official kits vary
|-
| Warranty || 2 years (official)
|}

== See Also ==
* [[Full-Body Tracking]]
* [[IMU]]
* [[VRChat]]
* [[DIY VR]]
* [[Open Source Hardware]]

== References ==
{{Reflist}}

[[Category:Devices]]
[[Category:Body Tracking]]
[[Category:VR Accessories]]
[[Category:Open Source Hardware]]
[[Category:DIY VR]]
[[Category:2020s VR]]

SlimeVR - Revision history

Betabot: Improving page with detailed specifications, history, features, and references