Light warmth automatic adjustment, set time light stays at Max. warmth

[jlynton]

• KOReader version:
• Device:

Issue

Steps to reproduce

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[jlynton]

I am using a Kobo Clara HD, but imagine this could be done for all readers with adjustable warmth fronlights.

When I set the frontlight's warmth to 'Auto', I can set the time at which it reaches the maximum warmth. After that time (23:00) the light starts to get whiter again and reaches maximum whiteness around 02:00. What I would really like is to be able to set the time when it reaches maximum warmth, AND set how many hours it will stay at maximum warmth, after which the light will progressively get cooler.

Would it be possible to add this in to KoReader?

[Frenzie]

Could you also include a link to the MR discussion?

[jlynton]

Certainly, here it is, thanks!

https://www.mobileread.com/forums/showthread.php?t=322783

[Frenzie]

Looks like these lines:

koreader/frontend/device/kobo/powerd.lua

Lines 269 to 270 in 840d05b

	-- Between 2-4h after bedtime, return to zero.
	self.fl_warmth = math.max(100 - 50 * (22 - diff_time), 0)

[jlynton]

i am no coder, but it looks like it would be simple to set it to stay at max warmth for longer (personally I would like 6-8 hours), but ideally there would be a user setting in the 'Frontlight' dialogue.

[Frenzie]

I think 22 is just 24 – 2, where 2 is the number of hours to keep the max value.

This function currently looks to be at risk of being tripled, see #5331. It should migrate to BasePowerD.

[pazos]

I think we have some time to migrate common code before merging #5331.

[Frenzie]

Volunteering? :-D

[AlanSP1]

Just to add my two cents, it would be really nice option to have (i.e. option how many hours it stays at maximum). Also, there could be option how many hours it takes to "fade in/out" from min to max.

If there's none I mean. Because, I don't mess with light temperature myself, but I imagine that it would be pretty nice to have these two options:

1. Time to stay at max value
2. Time to reach or loose max value.

[gerhaher]

3. Define max value (for those who don't like it to go to 100%)

[pazos]

Volunteering? :-D

For the refactor yeah! For this PR nope!. I will give it a look tomorrow

[AlanSP1]

3. Define max value (for those who don't like it to go to 100%)

Well, there can be also this one:

4. Define min (i.e. starting) value.

I think these 4 options would cover all. :D

[zwim]

I think we might close this (and mark as solved), as we have the AutoWamth plugin right now.

I was so free to add a new label (please update the description as you feel).