This property may take on many values while executing
commands. Depending on this value, the user is able to
monitor the current action that wodAppUpdate is performing.
Usually new commands are executed only when wodAppUpdate is
in state StateNotConnected, because
wodAppUpdate in that state is waiting for commands. All
other states inform the user that wodAppUpdate is busy at
that particular moment.
Each time state changes, StateChange
event is fired.
List of all states can be found here.