I've been doing some tests with Ekos using a raspberry Pi camera, but the exposure parameter is being ignored when capturing.
I configured the camera as a CCD V4L2 device and set the autoexposure parameter off, but when I click the capture button in the guiding tab for calibration it just captures the image ignoting the exposure time I set. In my case I tried with 2, 3, 4 and more seconds, but no difference.