Last night we were woken twice by the alarm of our C120 installed outside. This camera has two types of detection enabled: ‘people’ and ‘line crossing’, and the recorded video clip did not show any people entering the detection frame nor crossing the line.

However, I did notice in the video clip that there was a fly flying in front of the camera.

Since this camera has never given false alarms with only the ‘people’ type of detection enabled, is it possible that it was indeed a fly that, right in front of the camera lens, triggered the alarms by ‘crossing’ the line?

My understanding is that all available detection types are processed with the "OR" operator, right? If this is the case, wouldn't the "AND" type of operator solve this type of issue? For example, detect all peolple entering the detection frame AND crossing the line.