M5StickC-Plus changes in version 1.1

[bazman]

(I originally posted in General forum but had little response, here is probably more appropriate)

There was an update in December 2021 to M5StickC-Plus that is reported on the C-Plus docs page as:

"Added hibernation and wake-up functions, and changed version to v1.1"
from: https://docs.m5stack.com/en/core/m5stickc_plus

I have the original M5StickC-Plus. Are the changes to v1.1 related to new hardware, new firmware or new libraries? Can these new functions be used with the original M5StickC-Plus through an update? Can you link to the documentation for the changes too?

Thanks

Mark

[bazman]

I ordered another C-Plus today and got the v1.1 revision as expected. There's a difference on the label - Sleep/Wake has been added next to the RTC box, see below. I would like to know what the relevance of this change is.