Search found 2275 matches

by arnaud
Mon Feb 03, 2020 11:08 am
Forum: External positioning systems
Topic: Lighthouse Question about Coordinate Difference- Set-up Without HMD
Replies: 2
Views: 974

Re: Lighthouse Question about Coordinate Difference- Set-up Without HMD

The coordinate are 'out of sync' because the openVR space has its origin in one of the base station and the Crazyflie space will have its origin where the controller was placed. So there will be an offset between the positions estimated in steamVR and in Crazylfie. This will not be a problem as long...
by arnaud
Thu Jan 30, 2020 8:10 am
Forum: Quadcopters
Topic: External Antenna
Replies: 1
Views: 2454

Re: External Antenna

Hi, Yes you can use the radio to change the radio firmware, there is a bootloader in both CPU containted in the Crazyflie that is enabled by pressing the ON switch until the back left blue LED blinks when starting the Crazyflie. If both blue LEDs blinks, Crazyflie is in bootloader mode. The bootload...
by arnaud
Mon Jan 27, 2020 3:18 pm
Forum: Off topic
Topic: Going to FOSDEM 2020
Replies: 2
Views: 1393

Going to FOSDEM 2020

Hi all, I am going to FOSDEM 2020 in Brussels, Belgium, this week-end (the 1st and 2nd of February 2020). Fred, the maintainer of the Crazyflie Android client, will also be there. If anyone wants to meet, ping me here and we can meet somewhere at some point :-). I will have a brunch of Crazyflie stu...
by arnaud
Mon Jan 27, 2020 1:31 pm
Forum: Developer Discussions
Topic: [SOLVED] Control of two Crazyflies
Replies: 9
Views: 1739

Re: Control of two Crazyflies

I think the problem comes from 'ZMQ_NOWAIT'. According to https://stackoverflow.com/questions/14370489/what-can-cause-a-resource-temporarily-unavailable-on-sock-send-command this error just means that there was nothing to read when you called the receive function and since you asked it not to wait i...
by arnaud
Mon Jan 20, 2020 1:00 pm
Forum: Bitcraze
Topic: Radio Not Connecting
Replies: 5
Views: 1228

Re: Radio Not Connecting

If both red and green LED lit up upon connection and you see the Crazyradio in the list of VirtualBox device and manage to click it to enable it in virtualbox, then it is very likely that the radio firmware is going well. What you are seeing in the console indicates that the client does not see the ...
by arnaud
Mon Jan 20, 2020 12:57 pm
Forum: Bitcraze
Topic: Flying Crazyflie to a specific position setpoint
Replies: 24
Views: 3152

Re: Flying Crazyflie to a specific position setpoint

Hi, For your first question, yes you should call commanderSetSetpoint() at regular interval. You can see an example of that in the multiranger push demo: https://github.com/ataffanel/crazyflie-push-demo/blob/8b9b2e8/src/push.c#L105-L106. You need to fill up the setpoint structure to set X,Y,Z as abs...
by arnaud
Mon Jan 20, 2020 9:28 am
Forum: Bitcraze
Topic: Multiranger
Replies: 1
Views: 986

Re: Multiranger

Hi, The Crazyflie has no collision avoidance algorithms so you will have to implement this part. One way to go is to send high-level-commander goto set-points using the function cf.high_level_commander.go_to() (you can see it used in this example: https://github.com/bitcraze/crazyflie-lib-python/blo...
by arnaud
Mon Jan 20, 2020 8:58 am
Forum: Developer Discussions
Topic: [SOLVED] GUI doesn't display absolutely on ubuntu
Replies: 5
Views: 1391

Re: GUI doesn't display absolutely on ubuntu

You GUI looks correct to me, what function are you missing?

If you are talking about the missing tabs, you can enable them with the menu "view->tabs".
by arnaud
Mon Jan 20, 2020 8:57 am
Forum: Developer Discussions
Topic: stm32 chip of our drone
Replies: 1
Views: 1273

Re: stm32 chip of our drone

Hi,
I do not understand your question, could you maybe add a bit of context?
by arnaud
Wed Jan 15, 2020 9:09 am
Forum: Developer Discussions
Topic: Timer configuration (Interrupt service routine)
Replies: 2
Views: 1230

Re: Timer configuration (Interrupt service routine)

Do you actually need a hardware timer? If not, you can run something at 1 KHz in two ways using the RTOS: 1. Setup a FreeRTOS timer at 1KHz. Timers are running at quite low priority and you are not allowed to keep your function running for long (same as with an interrupt ...), so you might get some ...