You dont need to set up three...just two...
in the global schedule set profile to to be active during the hours you dont want the second camera to record.
Now in the camera properties for the camera that is always recording, from the dropdown menu in the motion tab select profile 2 and then uncheck group..
To understand profiles you need to understand this: The dropdown menu in the motion tab that lets you select profiles (and for that matter in the record tab and alert tabs etc) is not a selection you are making (you are not choosing profile 1 or 2 for that cam) but rather you are choosing what settings in that tab should apply when profile 1 or two is active...So you can set for example that during profile 1 (which is set in the global schedule) the group trigger is checked but in profile 2 its not.
Well I'll be.. This worked just like you instructed. I was cautious about experimenting with this solution because we were leaving on a short vacation, but once we returned I put this in place. I'm still not 100% understanding how the cameras "group together" and record during the day, but are "ungrouped" so that only "camera one" is recording in the evening. I am going to state what I think is happening, in hopes you will correct my understanding.
Problem: I had two cameras set in a group covering a large area. One camera faces forward and is set up for night images as well, the second camera is closer to the road and is tuned to capture license plates (only during the day and is not set up for night IR capture). This works fine during the day, but once night time comes, there was no need to capture images from the second camera (LPR - license plate reader) because the image is completely black (night time IR is turned off).
Solution: Use profiles to stop the recording of the second camera (LPR) at night, but still continue capturing video/images from camera one.
Approach: Set the global profile to have both cameras in a group. This allows one camera's motion detection to trigger both cameras and therefore record as much of the event as possible, even fast moving cars.
Create a second profile (called GATE) and have it active only during the night hours. Go into "camera one" settings and select the "motion" tab, pull down profiles and select the newly created (GATE) profile. Make sure that the "trigger camera groups" is not checked on this profile.
Result: The recording will capture the "group" video during the day per the global profile setting. At night, the camera's are no longer reacting to the "group" setting because "camera one" is now following the (GATE) profile, so the recording is only camera one.
