Brick ML in datacollection / data logging usecase

Hi

About to use those devices in a project. Looking forward to that.

Was wondering if it can empower data collection / logging activites without online studio connection?
Potentially triggered via ble characteristic / mobile app? ( happy to do custom integration on mobile side in case such possibilities are actually available ).

Is there any detailed information about what is possible with the device / apis? eg a usermanual in the context of Brick ML + EI?

I found this one but it is very HW centric: https://www.reloc.it/download/products/RD-BML/R22P04P1XDT00_BrickML-Box_UserManual_r11.pdf