Brightness follow sun

[yangminglong]

The brightness of the lights can be automatically adjusted according to the sunrise-suntop-sunset

[DedeHai]

thanks for contributing.
what is the difference of using this instead of sunrise/sunset prest or playlist?

[yangminglong]

thanks for contributing. what is the difference of using this instead of sunrise/sunset prest or playlist?

This UserMod can set brightness by mapping [minimum-maximum-minimum] from [sunrise-suntop-sunset], I use this UserMod to adjust the brightness of my plant growth light (pwm led), and I think it will make my plants happy.

Usermod Settings :

Enable - Active the Usermode
Update Interval Sec - update interval for change brightness
Min Brightness - set brightness by map of min-max-min : sunrise-suntop-sunset
Max Brightness - as up
Relax Hour - before sunrise and after sunset, maintain the min brightness for several hours

[DedeHai]

and using presets/playlists and transition times to do that will not work?

[yangminglong]

and using presets/playlists and transition times to do that will not work?
Yes, I think so. According to the Playlists Doc, it is not possible to implement this feature of Usermod.

[DedeHai]

what limits the implementation using the scheduler and presets/playlists?

[yangminglong]

presets/playlists

My needs are:
Linear adjustment of brightness starting from sunrise, ending at sunset, and reaching maximum brightness at the zenith of the sun. It is best to maintain low brightness for a period of time before sunrise and after sunset.
I don't know how to achieve such a requirement using presets/paylists. If possible, please let me know. Thank you.

[DedeHai]

I checked, its difficult to do that with presets and playlists.
Any reason you are doing linear instead of a more realistic sinusoidal curve?
I have a few minor tweaks (like avoid floats if possible) but apart from that it seems ok to me.
A bit more details in the readme on what it's intended use are and and an example description of settings you use and what those result to would be helpful.

[yangminglong]

I checked, its difficult to do that with presets and playlists. Any reason you are doing linear instead of a more realistic sinusoidal curve? I have a few minor tweaks (like avoid floats if possible) but apart from that it seems ok to me. A bit more details in the readme on what it's intended use are and and an example description of settings you use and what those result to would be helpful.

more realistic sinusoidal curve ? I haven't considered that much，'linear' seems enough for me.
I checked The existing 'float' in the code is necessary.

[DedeHai]

floats are not necessary at all, you can use fixed point math, but for just the calculation you do its ok to use floats.
I think if your mod is called "brightness follow sun" it should follow the sun's brightness correctly. at least think about it.

[DedeHai]

you really need to update that readme, it is not clear what each parameter does and what the outcome is, also how much is "several hours" or how much is the increase step? you would not want to have to experiment and wait 5 hours to see the result, then change parameters and wait again.

[yangminglong]

Change the brightness calculation algorithm from linear to sin