Dragonfly - Set: Standard

📡 Cave Slime Dragonfly – FBT Set with USB Receiver

The new generation of Cave Slime trackers in the Dragonfly edition features a direct connection via a dedicated USB receiver instead of Wi-Fi. Full compatibility with the SlimeVR ecosystem remains, offering lightning-fast response times, higher stability without signal drops, and instant setup without complex network configuration.

• ✅ PCVR & Standalone: Works with PC, standalone headsets, or mobile phones (when plugging the dongle directly via a USB-A ➔ USB-C adapter).
• ✅ USB Receiver (Dongle): Direct communication without interference or overloading your home Wi-Fi.
• ✅ Plug & Play: Just plug in the receiver and you are ready for action.

📦 Package Contents

Complete set designed for full lower body and torso motion tracking in VRChat and motion capture. The package includes everything needed for immediate use:

• ✅ Included: 5× main Cave Slime Dragonfly unit.
• ✅ Included: 1× dedicated USB receiver (Holyiot nRF52840 dongle).
• ✅ Included: 5× comfortable strap, 5× plastic holder, and 1× USB-C to USB-C connecting cable.
• 🏷️ Sticker Sheet: Included sticker sheet for easy labeling and identification of units by body part (chest, thighs, ankles).

🎯 ICM-45686 Sensor: Surgical Precision

In the Dragonfly units, I utilize the latest ICM-45686 sensor from TDK InvenSense, representing the cutting edge in motion tracking precision. It provides minimal unwanted drift, extremely low noise, and excellent stability even during fast movements or dancing.

• 🎯 Surgical Precision: Minimal drift even during long sessions.
• 🛠️ 6-Axis Factory Calibration: I carefully test and calibrate each unit on 6 axes before shipping.
• 🔋 Energy Efficient: Low sensor power consumption combined with radio transmission saves battery life.

🧲 Optional Magnetometer Wiring

As part of custom manufacturing, I offer the option to have the magnetometer circuit physically connected or disconnected. Before choosing the upgrade, please consider the essential differences:

• 🟢 Disconnected (standard mode, recommended): Maximum battery life per charge (~50 hours). The trackers perform reliably with standard motion sensors and are entirely immune to magnetic interference in your room. I recommend this option for the vast majority of users.
• ⚙️ Connected (requires tuning, half battery life): Hardware-activated magnetometer support offers yaw drift compensation, but comes with strict limitations:

• 🧭 Effective only in magnetically clean environments: The magnetometer assists with rotation drift using Earth's magnetic field. However, it is beneficial only in a completely magnetically clean environment. In an everyday play area with magnetic interference (speakers, subwoofers, nearby power banks, wireless chargers, bundled power cords, or motorized desks), tracking can actually become unstable and perform worse than without it.
• 🔋 Permanently reduced battery life: Physical circuit wiring reduces battery life by approximately 50% (~30 hours of operation), even if you subsequently disable the magnetometer in the software or console.
• 🛠️ Requires precise calibration: Proper operation requires thorough calibration in an interference-free space and manual fine-tuning in software.

⚠️ Connecting the magnetometer is strictly recommended for experienced users and enthusiasts who have an interference-free room, enjoy fine-tuning their setup, and accept the reduced battery life.

🎮 Compatibility & Use Cases

Dragonfly trackers are engineered for maximum versatility across VR applications and headsets without requiring external base stations:

• 🌐 Apps & Games: VRChat, Resonite, ChilloutVR, Dance Dash, NeosVR, Virtual Motion Capture (VMC), and VTubing software.
• 🥽 Supported Headsets: Meta Quest 2 / 3 / Pro, Pico 4, Valve Index, HTC Vive, and other PCVR and standalone headsets (via SteamVR, Virtual Desktop, or Link).
• 💃 Target Audience: Ideal for VR dancers, VTuber creators, streamers, and gamers seeking ultra-lightweight and stable full-body tracking.

⚙️ Setup, Comfort & Maker Support

I ensure that using these trackers is effortless right out of the box through long VR sessions:

• 🖥️ SlimeVR Server: Instant setup without Wi-Fi configuration – plug in the USB receiver, turn on the trackers, and play.
• 🧵 Ergonomics & Straps: Adjustable elastic straps provide a snug fit without pinching. The tracker itself weighs only 17 g, making it barely noticeable during gameplay.
• 🛠️ Durable Build & Support: Tough PETG enclosures stand up to intense motion. As a maker, I offer direct customer support, repair services, and replacement parts.

❓ Frequently Asked Questions (FAQ)

📊 Technical Specifications

I manufacture the tracker enclosures myself using 3D printing with high-grade PETG material. Custom color options are available upon request.