12-13-2018, 01:00 PM
We plan to support the camera eventually, but right now we do not support any camera at all. The light meter actually is a dedicated sensor, which is usually placed next to the camera (sometimes it is hard to see behind some glass that is not transparent in the visible spectrum). Maybe some phones use the selfie-cam as a light meter and just emulate the real sensor, but I would not expect this as it would drain the battery much more than just a cheap light sensor. Even on the iPhone X (and similar) there is a dedicated sensor in the notch space next to the camer (https://www.eetimes.com/document.asp?doc_id=1332274).
So, we will support light metering through both cams at some point, but it is not yet available in phyphox.
BTW: I think that in the video, the main reason to suggest an app that uses the camera instead of the light sensor, is that it is more widely supported. iPhones do also have a dedicated light sensor next to the camera, but there is no interface for apps to use it, so at the moment there is no support for light metering with phyphox on iPhones at all until we implemented the cameras.
So, we will support light metering through both cams at some point, but it is not yet available in phyphox.
BTW: I think that in the video, the main reason to suggest an app that uses the camera instead of the light sensor, is that it is more widely supported. iPhones do also have a dedicated light sensor next to the camera, but there is no interface for apps to use it, so at the moment there is no support for light metering with phyphox on iPhones at all until we implemented the cameras.