I'm creating a sensor that is not meant to return an explicit result on every run, and the state of the sensor should stay the same as before unless a different result is returned explicitly. I take it from the PRTG manual that this is exactly what the state "None" in value lookups is for, as the manual says: '"None" will not trigger a status change'. However, a status change is triggered nonetheless when the sensor switches from 'Error' to 'None': The channel meter shows state 'None', the corresponding channel show state 'None', but the head bar of the sensor turns green and says "OK". What to do to have the 'None' state not change the sensors status when being returned?
Value lookup state "None" triggers status change