Hello all. Is there a way to have a fixed shutter speed on the P2V+'s camera to override the auto shutter speed? For example, set it at 1/800 second.

You can set the ISO manually in the app. Your choices are 100, 200, 400. ISO is the film speed. This is from the old days of actually using film. You can also change exposure. Of course all these changes will affect the picture but in your editor program, you can readjust the picture.

No- it is a fixed aperture camera with auto shutter speed . You can fix the ISO only.  The best you could do is use a lightmeter if you have one- then determine the exposure at f2.8 and set the iso accordingly. You will still get fluctuation but it is the only chance you have of predetermining the exposure.Cheers!
Rod