from: Garadget Settings and Alerts
- Sensor Threshold - The minimum reflection rate to be interpreted as closed door. If the controller generates false negatives (i.e. reporting the door as open/opening when it is in fact closed) then threshold should be reduced to about half of the lowest reflection value. If the condition continues, consider re-positioning the unit and/or shielding it from the source of bright ambient light. The value can be increased in case of false positives (i.e. door intermittently reported as closed when it is in fact open or opening). False positives may be caused by the highly reflective surfaces in the path of the laser when door is in motion.