Tumble detection improvement

[tobbeanton]

The tumble detection is really good to avoid unnecessary damage to the Crazyflie when landing up-side down. However if a user don't know about this functionality it is confusing since the crazyflie needs to be restarted to fly again.

Suggestions:

• When tumble detection triggers show this with e.g. blinking the LEDs
• Print to cfclient console with useful information
• Make an automatic recovery when the crazyflie is turned back again

[whoenig]

I don't like the idea of an automatic recovery - that would be very dangerous if a user picks up the tumbled CF. Reset via a parameter (similar to resetting the EKF) would be nice, though.

[AsiaShi]

Thank you for your suggestions, I have increased the time to detect the tumble state, about 2s; Therefore, when I perform 360 ° flip operation, the UAV will not stop in an emergency, but when the tumbling time exceeds 2s, an emergency stop will be triggered. This is a better method I can think of at present. I look forward to your better improvement.

[knmcguire]

This issue might not be necessary anymore due to all the supervisor implementation lately.

#1272

[knmcguire]

So many things have changed here due to the supervisor implementation... so we will close this issue and consider it solved.