I ended up buying the motion sensor. I installed it outside, in my backyard. However, the sensor is sensing motion all day, every 3 minutes. But there are no humans or animals around, and this only happens during the day, not at night. Right under my sensor there are plants and there may be bees sometimes, but not all day. Also, the plants stay there, day and night.
For example: there are not many motion notifications around 2 am, but there are a lot after 8:56 am.
Could the bees or the plants be the source of so many motion notifications? Or does the sensor doesn’t work correctly when it is under the sun light?