I am trying to use the Zubax GNSS 2 with ArduCopter (v.3.5.0). GPS and Magnetometer are working fine. I enabled the barometer on the Zubax with 50 Hz. I used an oscillloscope to confirm, that the zubax sends the barometer message. I set the GND_PRIMARY value in MissionPlanner to 1. But still the Pixhawk uses his internal barometer values. Am I missing something in the configuration?