Hi @saengphet,
Great to see your reply. Actually, the problem you mentioned, I had faced in ardupilot(rover airframe). I am suspecting the configuration of rover airframe might be somehow different from normal. I haven’t tried rover airframe in px4. I will try and get back to you soon.
Could you specify which parameter correspond to EKF magnetometer? I am not sure I understand the parameter to be adjusted and by how much.
Regards,