About monitoring principles

1. The sensor uses infrared background radiation as the inspection principle

2. When installing, it is necessary to avoid direct sunlight and other heat sources as they may interfere with inspection results.

3. It can only check changes in background radiation and cannot monitor movement of background radiation

4. In order to avoid false alarms, we have made logical judgments internally:

-- A. If the previous state is "no state", when someone is detected, immediately report an alarm and set the state to "Human Status". At the same time, activate the 30-second "Human Status" countdown and do not check again until the countdown ends.

-- B. If the "Human Status" countdown stops, if someone is still present, restart the "Human Status" countdown for 30 seconds.

-- C. If the "Human Status" countdown stops, if there is no one left for 10 seconds, the sensor sets the status to "no state" and reports the information.

Therefore, it is incorrect to immediately test by waving arms once the setup is complete.

The correct testing method should be to leave the sensor completely for at least 40 seconds before reappearing in the sensor's detection range.