The BCU runs on the SBC (bananapi M1) and controls the whole backup process in a very fault-tolerant way.

After power-up it basically does the following

• setup schedule and wait for the point of time when the backup shall be made. Or make the backup immediately if the user requested it.
• connect to the data source (via network) and data sink (mechanically)
• invoke rsync to create an incremental backup
• disconnect from data source and sink
• set wakeup timer on SBU
• power down

run pytest test from the base-bcu directory.

• unit hardware independent unit tests
• integration hardware independent tests for features
• system hardware independent tests for the whole flow-chard
• hardware_dependent tests on the actual hardware (does only work on compatible SBCs which is only tha bananapi M1 for now). These tests can be used as end-of-line tests