IMU Not behaving correctly.

[mgrouch]

IMU would know where magnetic north is and where
gravitational force is directed.
What it doesn’t know how you installed it
and oriented relative to boat body.
So you need to do calibration type ‘boat is leveled’
and you need to enter offset for heading
using regular compass (IMU doesn’t know where your bow is)

The way pypilot is written after doing it
you need to wait (was it couple minutes)
before restarting pypilot or pi
because pypilot saves calibration that infrequently.

You also need to check permissions on file system
that PyPilot actually can save calibration file and that it’s
not read-only for it.