How FallGuard works

From the moment of a fall to a caretaker's alert in under three seconds — here is the full flow.

1. The accelerometer measures movement

   A 3-axis accelerometer on the wearable device samples acceleration along the X, Y, and Z axes many times per second, capturing every motion of the wearer.

2. The ESP32-C6 computes total acceleration

   The ESP32-C6 microcontroller combines the three axes into a single total-acceleration magnitude, giving one clear signal that represents overall movement intensity.

3. It detects an impact

   The firmware watches for the signature of a fall — a sharp spike in total acceleration followed by sudden stillness — and distinguishes it from normal daily activity.

4. It alerts the caretaker app in under 3 seconds

   When a fall is confirmed, the device sends a notification over Wi-Fi or Bluetooth so the caretaker's phone is alerted in under three seconds, with the time and device clearly shown.

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