I've been looking at some of the other questions about sensors, but I can't find a solution to my problem.
I have a movement sensor (PIR i presume) that turns on a light when movement is detected.
Annoyingly it turns on without reason; even when noone is in the house.
it is a dome sensor, located in the ceiling, at about 30cm from the light it turns on; I have put some black tape to obscure 50% of the sensor. it's located near 3 doors that are generally closed. There is absolutely no movement near.
what can trigger a PIR sensor aside movement?
Can I somehow fix this?