What is BI‑Vital?

The BI‑Vital is a lightweight, chest‑mounted body‑sensor node developed by the
Cognitronics & Sensor Systems Group, Bielefeld University.
It records rich physiological, kinematic and environmental data in real time while consuming only ≈ 35 mW.

🛠️ Multi‑sensor stack

1‑lead ECG, 9‑axis IMU, environmental sensor & microphone

📏 Form factor

31 × 61 mm, 17 g inclusive 150mAh battery
3‑D‑printed enclosure, dual buttons, RGB LED & vibration feedback

⚡ Edge TinyML

Ultra‑low‑power STM32L476 MCU with on‑device models for:
ECG validity • step counter • activity classification

📶 Logging & radio

BLE (nRF51) streaming + 128 MB NAND flash ➜ record and stream wireless and in parallel

🧰 Ecosystem tools

Cross‑platform Python library, web serial/DFU tools, Android / iOS / desktop BLE apps

This site collects all documentation, firmware and tooling around the BI‑Vital ecosystem.