Yes, after adding some foam, The UAV now are stable than a bit. Do you think the battery should be problem? Our 3S battery are quite old.

Thank for answer, I've checked the test data above. Here is the list of the /etc/snav# diectory and i checked the calibration.downward.xml and calibration.stereo.xml but both of them are similar as the test data from you.

• For the camera matrix i've checked in the ~/.ros/root/camera_info folder and they also non change
  

Hi @Chad-Sweet here is the serial number.

if you have more advices, please tell us.
Best regard.

Thank for reply,
I'll try it in the tomorrow. We're in middle of night (GMT +7).

Also,

• We never try to flight in the manual mode, only use the position and offboard mode.
• I don't think the external material was the reason for this issue because we had attached the component in the bottom of the frame closed as much as possible.
  Thank you.

Thank for reply,
@Chad-Sweet when the first time our test flight with M500 everything is work properly. you can take a look in this link by the video named before reset.
here

• But after I reset the drone into the factory set up. It's seem the VIO is work with many vibrations, some time it be acceptable.
• In the link above I was captured 3 videos and log file of each, for testing manual with VIO.
• Do I needed to recalibration the camera? I see the data from VIO is quite good when we move the UAV by hand.
• We were revert the UAV to the original state after that but the result is same.

actually the test frame is only attach in left and right side of UAV. The purpose of test frame is limits UAV in an area so we can avoid the damage when UAV loss control.
@modaltb do you have any idea?

and here.

@modaltb