GPS issue since 4.1

Hi there,

My quadcopter ran very well up last week I upgraded its fw from 3.x to 4.1

I’m getting an issue regarding my M8N : prearm GPS 1 not healthy. I never had this before

hdop value is less than 1 so quit good but “not healthy” appears and then disappears about every 10 sec

So, I made a log WeTransfer - Send Large Files & Share Photos Online - Up to 2GB Free, can somebody help me to make a diagnostic ?

Thanks a lot in advance

Typically this is not a new issue.
The 3.x did less tests, hence did not complain about the problem. But the problem was typically already there.

The solution is to fix the EMI issues by repositioning the antenna.


I understand why now. It’s finally a necessary evil to improve the behaviour of my uav, in fact before I found it not so accurate in term of position stability. Thanks for your precious advice, I know what I have to do.