True. It does not. You’d need to experiment with the optimial position of the sensor. Maybe put it under an eave where it won’t see car motion from the street, tilt it downward, etc. In general, though, if you’re using it outdoors, you’re going to get a lot of false positives. That’s just the nature of PIR sensors. And you should also be aware that it’s not weatherproof, so use it outdoors at your own risk.
If a person walks by and triggers the sensor, and the person appears on the recording, you should still get a person notification. But the detection is still happening on the camera, not the sensor. If your sensor is far away from the camera and a person triggers the sensor while no person appears on camera, for example, you would NOT get a person notification. Does that make sense? It’s analyzing the video. It isn’t analyzing any data from the motion sensor.
Wyze Cam doesn’t have a motion sensor, per se. It just detects differences in the pixels from the camera itself. You can use it either way. You can use only the camera’s detection. You can use only the motion sensor. Or you can use them both, and an event will be triggered when either of them detects motion.
As for why someone would use it with the camera – it may be more accurate in an indoor setting, particularly in the dark. You could also place a PIR sensor somewhere ahead of the camera, so that motion gets triggered earlier (If someone is walking up, for example) It’s really up to you, how you use it. Different people will use it in different ways. Some people use it to trigger Wyze Bulbs.
For me personally, I don’t really use it except when I’m out of town, just so that if someone is moving in my house unexpectedly, I’ll get a phone alert. I don’t use it in conjunction with my camera.