Hi TaTranky and welcome Here,
I would first try to get the above examples (post#3)to compile and run successfully. then see what power saving you can implement and what tradeoffs you can except.
I will indeed throw you a bone however and save you some time, in the sense of the embed 2.9.1 is the BSP to use in any effort of combinational usage of the sensors and BLE. it works.
You may also want to give these a read up,
Youtube video…
post anything you need help with , lots of smart folks willing to help here.
HTH
GL 
PJ