weather on watchface does not work on mi band 4. the ones on amazfit watchfaces do notmreally work. they have put this feature so it looks good and they are waiting for a firmware update which will let them make it.
If you start making a new theme, I suggest you to initially make it for the mi band 5 and port it to the mi band 4 later after you complete it. there arent too many good themes for the mi band 5.
the tool works using magical unicorns tool only to pack and unpack resources, so I dont think there is problem. maybe try to pack it again or maybe download magical unicorns exe tool and try to pack using that? btw you can try to unpack the resulting resources to check if it is correct?
no there are no specific dimensions for the images. you just have to make sure that your entire watchface will fir in 120 by 240 pixels so you should keep images small. you can use any program such as krita photoshop or ms paint.
I really didnt understand anything you said maybe you could explain it to me? No i did not try to reverse engineer the firmware(I dont know how to. i tried looking for a tutorial but could not find. I just know programming in java, python, C# for unity, arduino, and am learning cpp and am NOT...
yes, mi band 5 uses same microprocessor as mi band 4 and its firmware is also signed in same way as mi band 4. if we are able to find way to modify mi band 4 firmware, we will be able to modify mi band 5 firmware also using same method.