@knro:

I have no way to access the INDI Control Panel in EKOS. In the settings there seems to be only options for a local INDI instance.
As my INDI server runs on a headless RasPi and EKOS/KStars on my laptop, I'll have to enter a remote connection, as I do in the EKOS-Settings.

For ISO capability of the v4l2 driver:
You can change the ISO from the RasPi commandline:

v4l2-ctl --set-ctrl=iso_sensitivity_auto=0,iso_sensitivity=XX

with XX being a valid value for the device. check valid values with:
v4l2-ctl --all |grep iso
(each increase in value doubles the ISO)

I changed mine to 4 (which should be 800 or 1600, documentation is unclear about if 0 or 1 is ISO100) and took daytime images.
The higher ISO resulted in a grainier picture (so far so good), but overall it didn't seem to be any brighter (As it is with a "normal" digital camera, when you increase the ISO). Maybe some internal driver foo reduced exposure time or such.

I have no clue about the internals of the indi_v4l2_ccd driver, if or how requests like "change iso" or "change exposure time" are handled. If there is an API documentation, I haven't found it yet.

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