Sorry for being a bit offline this week *was mainly on the road, taking a break*. Now regarding the project:
- serial communication between Android and BBB is working
- sending files works but at a low speed *512 bytes chunk*, making the size bigger makes the communication instable
- the daemon that will run on the BBB at start has sources at https://github.com/ungureanuvladvictor/BBB-utils ; at this point it receives a single file but in 2 days will be final for reading and writing to eMMC.