Hello,
I’m working with a fixed-wing UAV running PX4 and experiencing an issue where the aircraft does not enter Mission (Auto) mode, despite all primary preconditions appearing to be satisfied.
What I’ve Checked So Far:
- All sensors and system calibrations are completed successfully.
- After calibrating and before arming, I get the error “compass inconsistent by 136 degress”. When I change the angle of the plane, I arm when this error is corrected.
- The aircraft arms without any issue.
- GPS has 3D Fix with acceptable HDOP.
- Telemetry connection to QGroundControl is solid.
- A full mission is planned and uploaded, including a TAKEOFF command as the first waypoint.
- The vehicle is in stabilized flight and can be switched into other modes, but does not accept Mission mode.
Error Messages / Critical Warnings Observed:
critical: preflight fail: compasses 171 degree Inconsistent
→ There appears to be a compass inconsistency warning (possibly between internal and external compasses).Error: Mission rejected: the landing glide slope is steeper than the vehicle setting of 5.0 degrees
→ Mission is rejected due to an excessively steep landing profile.Error: Reduce the glide slope, lower the entrance altitude 33 meters, or increase the landing approach distance 449 meters
→ PX4 suggests modifying the landing profile (altitude or horizontal distance).
/// Additional notes
- using pixhawk 2.4.8 and gps M8N module
- Using QGroundControl (latest stable).
- Autopilot hardware: [e.g., Pixhawk px4 v 1.15.4].
What do I need to do to fly autonomously?
Thanks in advance for any insight.
