Manual exposure time control in Solar / Scenery

[LeoDelizy]

To transform the seestar into a powerful photographic tool, all we need is a way to set the exposure time manually in solar/sccenery mode and save FITs or Raw Video files ! There are two ways to approach this :

• in solar/scenery mode, simply change the exposure time via a request, allowing to bypass the 200ms limit set in the app.
• in stargazing mode, start a capture forcing the seestar not to platesolve or track, and save the FITs files !

[smart-underworld]

I dug into this, and discovered that Seestar firmware limits the maximum exposure time to 200ms, so the limit is not only enforced in the software level, but the underlying firmware.

More promising approach is to use stargazing mode. Captured raw fits from 2s exposures. Will test out ways to bypass platesolve and tracking.