I succeeded in reading IMU from RS2, but we have to make our own programs to fetch the data. Currently there is no support yet in the emlid-software, so keep in mind there is not support from Emlid at the moment.
Biggest issue for now is that we cannot start this software at boot of the device 
For more details/history/forks of software which have support for the IMU-chip, see Success with IMU data! - #22 by abertier
(previous, and following posts also contain lot’s of usefull information, but that’s the post where I started to get things working)