@Crady wrote:
I have a Pixhawk (from 3DR) and I know both it and AC support dual GPS, but I can't seem to find any explanation as to whether the two units must be identical in order to work correctly (to be specific, I have two Neo-M8N GPS units from different manufacturers and while they share the same u-blox modules I suspect they have different compasses.) The reason I ask is when I use dual GPS I get errors during compass calibration (the secondary GPS always fails regardless of which unit is used as the secondary.)
When working as a pair, both units show up in AC 3.4 and both units appear to be healthy and see roughly the same number of satellites. However, it takes several attempts at the compass calibration routine before the results are accepted, and even then the secondary unit always has errors. If I just use one GPS unit at a time there are no errors.
Does anyone know if matched units will resolve this?
Thanks!
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