@iforce2d wrote:
I built a plane recently that maintains “3D Fix” status nicely with about 9-11 satellites (indoors near a window). However as soon as I switch on my radio the status becomes “No GPS”, and the fix never comes back until the flight controller is rebooted. This behaviour is 100% repeatable.
Every component is the exact same thing as about 6 other planes I have that work perfectly fine. Omnibus F4 pro, BN220 GPS module, FlySky 2.4GHz radio, plane 3.9.8. I have also tested with three different GPS modules and two different cables between FC and GPS, with the same results.
Note that this is not about the radio swamping the GPS sensitivity by being too close, because the same problem occurs when the radio is far away. Also when GPS reception is interfered with the status will be “No Fix”, not “No GPS” which means there is no GPS connected at all. When the radio is off and I put the plane in the worst part of my house for GPS reception, I get the expected “No Fix” status.
Any ideas what could be causing this?
EDIT: The receiver is an x6b, and the problem occurs with both PPM and SBUS output. It does not occur when the receiver is not connected to the flight controller. The settings for serial protocols are exactly the same as another plane which I copied them from, which is working fine.
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