* Change default port to Serial4 and improve status outputs.

* Reduce stack size.

- replay was not working without these values as only range measurements
were given to the filter which were between the min/max value

Signed-off-by: Roman <bapstroman@gmail.com>

Same as for the df_hmc5883_wrapper.

The calibration values need to be applied after the rotation, otherwise
the offsets and scale can be applied to the wrong axes.