Search found 630 matches

by kristoffer
Mon Apr 06, 2020 6:28 am
Forum: Developer Discussions
Topic: Using Optitrack MoCap, but no ROS
Replies: 3
Views: 2563

Re: Using Optitrack MoCap, but no ROS

Great! Please consider sharing a simple example script if you get it to work. No, the flow deck is not required. Flow together with absolute positioning may even confuse the kalman estimator, it is better to not use them at the same time. You can either force the Kalman estimator to be used, or use ...
by kristoffer
Mon Apr 06, 2020 6:18 am
Forum: General discussions
Topic: usage of Node like range estimator
Replies: 1
Views: 1679

Re: usage of Node like range estimator

Yes you can. If you use a LPS Anchor, the two way ranging mode will almost work out of the box for what you want to do. All you need to do is to modify the code here https://github.com/bitcraze/crazyflie-firmware/blob/2020.02/src/deck/drivers/src/lpsTwrTag.c#L253-L262 This is where the range has bee...
by kristoffer
Thu Apr 02, 2020 6:11 am
Forum: Developer Discussions
Topic: Using Optitrack MoCap, but no ROS
Replies: 3
Views: 2563

Re: Using Optitrack MoCap, but no ROS

Hi! I have never used an Optitrack system but I have done it with a Qualisys system and assume the process will be similar. The easiest way is to do it in python. First step is to find a python connection for the Optitrack system where you get the position of the Crazyflie. Second step is to feed th...
by kristoffer
Wed Apr 01, 2020 8:51 am
Forum: External positioning systems
Topic: Lighthouse deck and USB serial port communication
Replies: 7
Views: 16593

Re: Lighthouse deck and USB serial port communication

I must admit that I'm not completely sure how the bootloader works (it is probably documented in the lighthouse-bootloader repo), but what is working for me is to flash it while booting. The first time with a new binary I get (running from the lighthouse-fpga repo file tree) lighthouse-fpga kristoff...
by kristoffer
Tue Mar 31, 2020 6:28 am
Forum: Loco Positioning System
Topic: tcxo crystal should be improve the accuracy
Replies: 7
Views: 3846

Re: tcxo crystal should be improve the accuracy

my doubt is tdoa 3 send a packet about random 30ms, the packet record the tx timestamp, and other anhcor receive and record the rx timestamp, badly, if the two packet time interval is 30ms, when you calc the distance diff with two anchor, I think the clock correction error is large From what I have...
by kristoffer
Mon Mar 30, 2020 11:56 am
Forum: External positioning systems
Topic: Lighthouse deck and USB serial port communication
Replies: 7
Views: 16593

Re: Lighthouse deck and USB serial port communication

Are you sure USB-to-UART is working on your machine?
Which OS are you on? I'm on OSX and I had to install a driver (https://www.silabs.com/products/develop ... cp-drivers), it is apparently not supported out of the box.
by kristoffer
Mon Mar 30, 2020 11:51 am
Forum: Developer Discussions
Topic: [solved] crazyflie firmware and c++
Replies: 4
Views: 2187

Re: crazyflie firmware and c++

Hi! I know Arnaud looked at C++ at some point, but as far as I remember he ran into some kind of problem, not sure what though. We did not have the app layer at that time, it might be possible to get that to work? I found this thread that might help you? https://www.freertos.org/FreeRTOS_Support_For...
by kristoffer
Fri Mar 27, 2020 10:40 am
Forum: External positioning systems
Topic: Lighthouse deck and USB serial port communication
Replies: 7
Views: 16593

Re: Lighthouse deck and USB serial port communication

Hi! I think the problem might be that we are working on the lighthouse-fpga project to add Lighthouse V2 support, and that the code has changed recently. If your deck has the stock binary it is not compatible with master as the protocol has changed. You should probably look at the scripts in the V2 ...
by kristoffer
Thu Mar 26, 2020 9:15 am
Forum: Support
Topic: Software issue
Replies: 11
Views: 5639

Re: Software issue

I mean do you use Windows, MacOS or Linux on your computer? I read the post, though I don't know how to do that: "In the mean time, could you also downgrade the cflib to one from 2017 ? (I think you can do it as pip/pip3 install --upgrade cflib==0.1.3)" To clarify. In a terminal window, ru...
by kristoffer
Thu Mar 26, 2020 9:07 am
Forum: External positioning systems
Topic: Light House Deck Damaged?
Replies: 3
Views: 11438

Re: Light House Deck Damaged?

It looks like something is not working as expected with one of your decks. Could you please contact us on support@bitcraze.io, we will handle it there.
Thanks!