diff options
Diffstat (limited to 'src/sensors/qirproximitysensor.cpp')
| -rw-r--r-- | src/sensors/qirproximitysensor.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/sensors/qirproximitysensor.cpp b/src/sensors/qirproximitysensor.cpp index 4b7eeec3..6197bb96 100644 --- a/src/sensors/qirproximitysensor.cpp +++ b/src/sensors/qirproximitysensor.cpp @@ -63,6 +63,12 @@ IMPLEMENT_READING(QIRProximityReading) The sensor reports reflectance as a decimal fraction in the range of 0 - 1. That is, 0 indicates nothing was detected within the range of the sensor and 1 indicates the infra-red signal returned at the full power level that it was sent at. + + With some IR sensors, it is quite uncommon to reach the top and the bottom of the + value range, and some parts of the range ends might not be obtainable at all. This is due to the + behavior of the sensor hardware. With these sensors, the absolute value of reflectance should never + be used directly. Instead, applications should react to the relative change of the reading values. Use + QProximitySensor if it is only necessary to check if something is close to the device or not. */ /*! |