Very often I get an EKF Internal Checks Error → not arming I figured out that the magnetic canopy mount has to be closed immediately after the battery is connected for reducing the magnetic field to the value which mag cal was done. But closing the canopy adds vibration into the start procedure. Mo…

[image] taileron: I figured out that the magnetic canopy mount has to be closed immediately after the battery is connected for reducing the magnetic field to the value which mag cal was done. To me this sounds like that the magnetic canopy is interfering with your mag. My opinion is that you …

I know all this … and it works if I close the canopy fast enough without causing too much vibration … there are more FC and 2 GPS rec built into that airframe so there is not enough space to put all to places that are not magnetic at all … so is there a possibility to delay the startup a few second…

I see. Well you can add a sleep 10 in the startup script, e.g. here: PX4/Firmware/blob/1d5684823d65fefdb57f56164dd0f2a40e4c8757/ROMFS/px4fmu_common/init.d/rcS#L86 # Print full system version. # ver all # # Start the ORB (first app to start) # tone_alarm and tune_control # is dependent. # …

1000 thanks, that works up to 12 seconds, above QGC displays a time out error cause mavlink seems to start earlier … flight tests will follow later (still enough time to place the plane with closed canopy into a vibration free space …)

I don’t think MAVLink starts earlier but maybe you have another MAVLink component that you’re receiving?

tested with a spare PixRacer connected via USB and 12 sec works perfect without any errors. Would it not be nice to add a start delay into the parameters to increase the delay eg in case of a cold start with very low temperatures. And lower the delay for warm start or higher temperatures. It woul…

Thanks for the note. I was just told log upload should be fixed.

It seems that the arming procedure requires as well that the plane doesn´t move at all in this moment. here´s a log: https://review.px4.io/plot_app?log=2998bcc2-07c2-4af6-821c-627187f0d79c

Hi Julian, Up to V1.11 I was able to use this delay of 3…5 sec at the end to successfully avoid e.g. high accelerometer bias and various other errors on different boards (some without sd slot). Unfortunately, in V1.12 I can no longer find a good place where a delay of more than 2 seconds does not p…

PX4 delayed startup?

PX4 Autopilot

taileron June 6, 2019, 8:45am 8

since the 12 s startup delay I had no errors anymore, I could share the log (review.px4.io) but currently the log upload ends up with “HTTP Error 500” whereby viewing old logs still works

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PX4 delayed startup?

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