Unstable Heading

does someone know what to do if i have Problems with very unstable Heading? I have a Ardusimple board and tried with v3.0.9 and v4.

It worked for a few hours but now (i don’t know what I changed) it is only stable if I am faster then 10/12 km/h.


If i set Fix to fix distance to 4 m it is better but still some fault. (And it worked before with 1m)

Switch off u-center.


It was not connected to the receiver. But I also tried it with u-center closed.