For the moment, the only action available via the cron_add method in the API is to turn off the lamp (page 16 of https://www.yeelight.com/download/Yeelight_Inter-Operation_Spec.pdf).
It would be great if other actions were available, for example change brightness, set color, set temperature, start flow…
That would make it possible to create a wake up alarm for example.
This is doable with Phillips hue, and it would be great if we could do that with Yeelight as well.
Will we see more cron actions / scheduled actions in the future ? Is YeeLight working on that or willing to do it ?