I couldn't find any reference to customizing the app to bracket the camera exposure by ISO instead of the usual aperture or shutter speed. Is this currently possible in dslrdashboard? If not, I would like to propose it as a feature request. This is useful in the studio with the camera locked down and external studio strobes for HDR captures where you don't want to vary aperture (slight focus shift) and shutter speed has no effect on the flash exposure. That leaves ISO as the workable variable.
This feature would also need the ability to manually set the interval between the shots in the bracket to match the recycle time of different strobes.
Thanks!
John