Use the same `wait_for_event` in all tests that doesn't hold a reference to
the event data tuple and handles repeat events.
Also fix a few misc reliability issues around timeouts and sequencing.
Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
A read-only memoryview object is a better representation of the data, which
is owned by the ubluetooth module and may change between calls to the
user's irq callback function.
Signed-off-by: Damien George <damien@micropython.org>
Jim Mussared