Problems with cmdVel(roll, pitch, yawrate, thrust).

[Wallat1]

Hi.

I have used the commands takeoff and land and I have not had problems, but when using the cmdVel(0, 20, 0, 90), the crazyflie make nothing, for this reason I would like to know if is it necessary to make use of other commands? or if do you have an example of how to use it?.

I would appreciate your help.

Regards.

[whoenig]

The firmware has a safeguard that first requires you to send (0,0,0,0) a few times. Other than that, you can simply use low- and high-level commands. Just switching from low- back to high-level is a bit more tricky.

[whoenig]

Not needed in that case.

[Wallat1]

Hi.

I have tried to replicate the program ramp.py of crazyflie-lib-python, but it does not work, I attach code

I do not know that it could be wrong with the code.

I would appreciate your help.

Regards.

[whoenig]

Could you specify in which way it doesn't work?

[Wallat1]

Hi.

When I run the program ramp.py the motors turn on, but in this case the crazyflie does nothing, just the led blinks when executing the program.

I hope you can help me.

Regards.

[whoenig]

Your code looks fine. Is the CF connected properly? Are there any relevant logging messages?

[Wallat1]

Hi.

Yes, the CF is connected properly and I do not get any message, for that I do not understand what can be wrong with the code.

Regards.

[knmcguire]

Do you have a controller by any chance? Technically the standard launch file hover_swarm.launch enables connecting an controller and that is able to use the same cmd_vel as well.

Also could you try to add a sleep to the while loop too?

[Wallat1]

Hi.

Yes, I have a ps4 controller, but I don't know what file I have to modify to use cmdVel() , could you tell me what I should modify please?. On the other hand I know that the controller is working because when I press the R2 button the CF takes off and with L2 it lands.

Regards.