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XAICHB — Hard Braking Threshold

Configures the deceleration threshold used to detect hard braking events (signal F41). The threshold is the X-axis deceleration magnitude in milli-g (mg) that must be exceeded to raise the event.

Format​

  • Query: >QXAICHB<
  • Set: >SXAICHB{VALUE}<
  • Reset to default: >SXAICHB<
FieldDescription
VALUEThreshold magnitude in mg (unsigned integer)

Response​

>RXAICHB{VALUE}<

Examples​

>QXAICHB<       →  >RXAICHB260<
>SXAICHB350<    →  >RXAICHB350<
>SXAICHB<       →  >RXAICHB260<  (reset to default)
  • F41 — Hard braking (alignment gated)

Notes​

  • A lower value increases sensitivity (events trigger sooner); a higher value reduces false positives.
  • All driving-behaviour signals require IMU axis alignment to be complete (see XAICAR).
  • Sending >SXAICHB< without a value resets the threshold to its factory default.
  • Out-of-range values are rejected.
  • The threshold is persisted across reboots.

Defaults and Limits​

  • Default value: 260 mg.
  • Valid range: 10 to 2000 mg.