Compass 3 not found

I am pretty noob in copter, but for the second my build I am suffering with the same issue: compass 3 not found.
The problem is that I don’t have 3rd compass at all. I am running Chinese pixhawk 2.4.8 with internal compass + external M8N GNSS module with i2c compass. Here is the screen from QCG on my phone:

I tried to set compass_prio3_id to zero and it fixed the problem for a while. But then it returns:

Also, I don’t have any SPI connections.
What should I do to disable 3rd compass forever?

In Mission Planner’s compass setup tab, there’s an option to remove missing compasses.

I don’t know if QGC offers the same option.

Whether or not you prefer QGC for normal operations, Mission Planner is better suited for initial setup.


You can set COMPASS_USE2 = 0 (Disabled)

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Thank you, I will try MP. I am Linux user for last ~10 years, so thought that QGC is better for me :man_shrugging:

Thank you, I did it and it works! No new compasses for a couple of flights!