Arlo Pro motion notification inconsistent. Notifies on some vehicles but not all vehicles.

[asuirish]

I repositioned my camera so I could get a better view of front porch (for packages) while also getting our parking area. Curious if anyone knows what I get notifications for vehicles on the road (greenish looking truck) but the silver van pulling into my parking does not trigger. I also seem to get notified of people in the walking path and around the road but not in the parking area or the area near the mailbox. Just trying to troubleshoot. I have activity zones set for the porch and the parking area. Still not helping. Motion Settings set to 70%. See photo for reference

[jguerdat]

Given the distance, it would appear to be due to the difference in the IR signature from each vehicle. Perhaps the van hadn't been running long and/or the cooling is more effective than the truck. ALso, the dark color may have absorbed more heat from the engine and possibly the sun.

[asuirish]

It just seems odd that no vehicle that pulls into our parking area, registers yet the vehicles on the road do. It was also a rainy day and we had zero visible sun. I am starting to wonder if it is due to the model of the camera and would the Arlo Pro 2 or 3 fix the situation. I like the position of the camera since it has a lot more coverage than where I had it before. 

[jguerdat]

PIR sensors all work the same. A newer model (theoretically) wouldn't make any difference.