Security and Tamper
Glasscalibur has an on‑board accelerometer that can act as an anti‑tamper alarm — useful if you want to know when a mounted unit has been moved, tilted, or pried off the window.
When armed, the device learns its resting orientation (a "baseline"). While the cover is idle, it compares the live accelerometer reading to that baseline once a second. If the device is moved or tilted past the Tamper Threshold, it:
- enters the TAMPERED state (shown in the State entity),
- latches Tamper Detected, and
- sounds the buzzer for about 60 seconds.
The check only runs while idle, so normal motor motion can't trip it.
In the Security / Tamper group of the web UI:
- Mount the device in its final position and let it sit still.
- Turn on Tamper Detection. This automatically captures the current orientation as the baseline, so you don't normally need anything else.
If you ever reposition the device, press Set Tamper Baseline while it's at rest to re‑learn the new resting orientation.
Tamper Threshold is the amount of movement (in g) that trips the alarm. The default is 0.30 g (≈ a 17° tilt or a moderate bump).
- Lower it for a more sensitive alarm.
- Raise it if you get false alarms (e.g. from a drafty/rattly window).
Any of these silences the buzzer and clears the TAMPERED state:
- Button 1 on the device — a single click.
- Clear Tamper Alert button in the web UI.
- Set Tamper Baseline button (also re‑captures the baseline).
The alert is latched — a device that's bumped and then put back won't silently un‑flag itself; you have to acknowledge it.
The Tamper Trips counter in Diagnostics records how many times tamper has been detected over the life of the device, with a reset button. Handy for spotting tamper attempts that happened while you weren't watching.
Tamper Detection ships disabled by default — it's opt‑in.