I wanted to use stronger noise reduction at night and weaker during the day, but Dahua seems to have made a mess of the profile management. There doesn't seem to be a way to have the camera switch automatically between Day and Night profiles when the camera changes between "Color" and "Black & White" mode. The Profile Management tab has a "Normal" mode which is evidently supposed to do this (IPC/Camera Configuration - Dahua Wiki). But I just tried it. It doesn't do that at all. Choosing "Normal" just makes the camera use a third profile, which is neither "Day" or "Night" but a separate third profile called "Normal", which stores settings independently of the "Day" and "Night" profiles. Dahua engineers must live in a world where it is perfectly acceptable to say: or Now I know why Nayr has his profile management scripted externally, but even that seems to be a mess: Switch Dahua Day/Night Profile via IPC HTTP API Update I've written Windows software to take care of this. GitHub - bp2008/DahuaSunriseSunset: A Windows Service which changes the profile of dahua cameras between Night and Day at each sunset and sunrise.