IMU configuration for Activity AI
The IMU Configuration allows you to define how the device’s inertial sensors are used. It provides two mutually exclusive configuration modes:
IMU settings - Configure raw IMU sensor behavior and sampling parameters.
Free Fall detection - Configure free fall detection parameters.
Both switches are disabled by default when creating a new configuration. Only one mode can be active at a time. Enabling one automatically disables the other.
IMU Settings
Enabling IMU Settings activates manual configuration of the device’s inertial sensors. When enabled, the following default IMU setting values are applied:
Parameter | Default | Available Options |
|---|---|---|
Sample Rate | 104000 | 12500, 26000, 52000, 104000 |
Accelerometer | Enabled | Enabled / Disabled |
Gyroscope | Enabled | Enabled / Disabled |
Accelerometer Full Scale | 16G | 2G, 4G, 8G, 16G |
Gyroscope Full Scale | 2000 DPS | 125, 250, 500, 1000, 2000 DPS |
These values are considered the recommended configuration for features relying on IMU sensor data, For ActivityAI, please leave the configuration at the default values.
MAI Exclusive Options
For MAI only, the following additional sensors can be enabled:
Enable Magnetometer.
Enable Barometer.
Reliability Warning
A warning message is displayed if:
Any IMU parameter deviates from the default IMU setting values.
The Enable Accelerometer, Gyroscope option is disabled.
The warning informs the user that changing these values may cause reliability issues for features that depend on IMU sensor data. Free fall parameter changes do not trigger this warning.
Free Fall Detection
Enabling Free Fall Detection automatically disables the IMU Settings mode. This mode allows configuration of fall detection behavior using predefined thresholds.
Parameter | Default | Available Options |
|---|---|---|
Free Fall Force | ~0.3 gravity | ~0.2, ~0.3, ~0.5 gravity |
Pause Between Fall Events | 0.25 s | 0 s, 0.25 s, 0.5 s |
Minimal Detected Height | 1 m | 0.5 m, 1 m, 1.5 m, 2 m |
Changing free fall parameters does not trigger a reliability warning.