BMI270 - Extension: Arms
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Product detailed description
➕ Cave Slimes BMI – Extension: Arms (Wi-Fi)
Already own the Cave Slimes BMI Standard core set and want an affordable way to add upper body tracking? This extension pack adds two standalone wireless Wi-Fi trackers with arm mounting straps. They connect directly over your home Wi-Fi network to the SlimeVR Server, delivering authentic tracking of elbows, forearms, and natural arm gestures without relying on inverse kinematics guesswork.
- ✅ Affordable Budget Option: Standalone wireless units at a great price point for upper body tracking expansion.
- ✅ Arm Straps: Comfortable and secure elastic straps for mounting on biceps or forearms.
- ✅ Instant Tap to Reset: Realign your tracking position in just a second by double-tapping your chest tracker.
📦 Package Contents
Compact pack with everything needed for immediate arm mounting:
- ✅ Included: 2× standalone wireless Cave Slimes BMI Wi-Fi unit.
- ✅ Included: 2× comfortable elastic arm mounting strap.
- ✅ Included: 2× plastic tracker holder.
- 🏷️ Integrated Labeling: Left and right arm placements are 3D printed directly on the tracker lids for instant identification.
🎯 Bosch BMI270 Sensor: What to Expect?
The trackers are powered by proven 6-axis IMU Bosch Sensortec BMI270 sensors, featuring ultra-low power consumption and responsive tracking. As a budget sensor, expect a recalibration (reset) interval of approximately every 15 to 20 minutes.
- ⚡ One-Second Reset: Recalibrate instantly in-game via Tap to Reset or by binding a controller button.
- 🔋 Energy Efficient: Low power draw preserves battery life for extended VR sessions.
- 🛠️ Dynamic Calibration: I carefully test and calibrate each tracker individually before shipping.
🎮 Compatibility & Use Cases
The arm extension integrates seamlessly alongside your existing setup in the SlimeVR ecosystem:
- 🌐 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 VR headsets (via SteamVR, Virtual Desktop, or Link).
- 💃 Why Add Arm Trackers: Provides realistic upper-body motion and prevents unnatural avatar elbow bending.
⚙️ Setup, Comfort & Maker Support
I ensure that wearing and using the arm trackers is simple and comfortable:
- 🖥️ SlimeVR Server: Adding the trackers to your existing setup in the app takes just moments.
- 🧵 Ergonomics & Straps: Elastic straps securely hold the trackers on your arms without pinching.
- 🛠️ Maker Support: I print and assemble everything in-house. I provide direct support, repair services, and replacement parts.
❓ Frequently Asked Questions (FAQ)
With the BMI270 sensor, the typical interval for a quick reset is approximately every 15–20 minutes. Resetting takes only a second—stand straight and double-tap your chest tracker (Tap to Reset feature), or bind the reset action to a VR controller button.
Trackers are typically placed above the elbows on the upper arms (biceps) or on the forearms depending on your preferred SlimeVR configuration.
The trackers operate exclusively on the 2.4 GHz Wi-Fi band (5 GHz networks are not supported). Your network name (SSID) and password must not contain special characters, spaces, diacritics, or be excessively long.
📊 Technical Specifications
Tracker enclosures are 3D printed with custom color options available upon request.
| Motion Sensor | Energy-efficient 6-axis IMU Bosch Sensortec BMI270 sensor (2 units included). |
| Typical Reset Interval | Approx. 15–20 minutes (quick 1-second recalibration via Tap to Reset). |
| Connectivity | Wi-Fi 2.4 GHz (2.4 GHz only, direct connection to SlimeVR Server). |
| Charging | Modern USB-C port. |
| Supported Software | SlimeVR Server, SteamVR, VRChat, Resonite, ChilloutVR, VMC. |
| Manufacturing | Custom 3D printing (color customization available on request). |
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