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Re: Flow deck issue

Posted: Tue Dec 03, 2019 9:12 am
by arnaud
Your tests matches what I have experienced when running LPS and flow together: there is something that is sometime happening that makes the Crazyflie just 'snap' and crash. I suspect this comes from the EKF getting confused with conflicting information from both the flow and the LPS but I cannot be sure of it.

One thing to try could be to increase the standard deviation of the flow sensor ( ... .c#L94-L95) and/or of the down-facing ranging sensor ( ... .c#L47-L50). If the problem comes from conflicting data between LPS and Flow, increasing the flow standard deviation should help.

Re: Flow deck issue

Posted: Wed Dec 04, 2019 10:38 am
by faria
Thanks Arnaud.

I realized several tests.

Increase standard deviation from 0.25 to 0.35 and 0.7: The problem maintain.

I have different hardware version of drones 2.0 and 2.1.
With drones 2.0 the issues are not critical. For drone 2.1 are very criticil (4 flights i have 3 crash).

I will modifies some things on the code. When I will have a good results I will share.

Re: Flow deck issue

Posted: Sun Dec 08, 2019 11:58 pm
by estrategico
I had problems using LPS and zranger and flowdeck (flow disabled) with TDOA2, have you tried TDOA3?

I also had problems connecting z ranger ver2 because the deck didn't assemble properly.

Re: Flow deck issue

Posted: Mon Dec 09, 2019 2:10 pm
by kristoffer
I have added an github issue for this problem ... issues/523