Search found 321 matches

by whoenig
Wed Feb 20, 2019 5:42 pm
Forum: Loco Positioning System
Topic: cmd_vel in crazyflie_controller_bridge.py
Replies: 5
Views: 887

Re: cmd_vel in crazyflie_controller_bridge.py

Unfortunately, this particular one is not in crazyflie_cpp, yet. I added an issue for it https://github.com/whoenig/crazyflie_cpp/issues/8. Once it is there, I can also add it to crazyflie_ros using a new ROS topic.
by whoenig
Thu Feb 14, 2019 9:45 pm
Forum: Bitcraze
Topic: `what(): LIBUSB_ERROR_TIMEOUT ` Error on Roadrunner (Only on USB)
Replies: 2
Views: 685

Re: `what(): LIBUSB_ERROR_TIMEOUT ` Error on Roadrunner (Only on USB)

Feel free to open an issue in github for crazyflie_ros or crazyflie_cpp. I have seen this issue before with USB and a regular Crazyflie. Here is a change that reduces the probability of issues occurring, but does not entirely fix the problem: https://github.com/whoenig/crazyflie_cpp/commit/2d3557ee8...
by whoenig
Wed Feb 13, 2019 5:52 pm
Forum: Loco Positioning System
Topic: cmd_vel in crazyflie_controller_bridge.py
Replies: 5
Views: 887

Re: cmd_vel in crazyflie_controller_bridge.py

For new setups I think it is best to use the TDoA 3 mode. Then, you shouldn't need lps-ros at all. Instead, all the sensor fusion/state estimation is done on-board the CFs EKF. You can use crazyflie_ros or the crazyswarm with the PID or mellinger controller for velocity control. The controller in cr...
by whoenig
Wed Jan 30, 2019 11:35 pm
Forum: Support
Topic: Flow deck + high level control under ROS
Replies: 1
Views: 432

Re: Flow deck + high level control under ROS

test_high_level.py was only tested together with https://github.com/whoenig/crazyflie_ros/blob/master/crazyflie_demo/launch/external_position_vicon.launch, which in turn runs https://github.com/whoenig/crazyflie_ros/blob/master/crazyflie_demo/scripts/publish_external_position_vicon.py#L14-L23. Since...
by whoenig
Fri Jan 18, 2019 11:08 pm
Forum: Support
Topic: [SOLVED] Crazyflie ROS Stack "cmake failure"
Replies: 2
Views: 881

Re: Crazyflie ROS Stack "cmake failure"

Hi,

The book chapter is a bit outdated. You will need to initialize and update the git submodules, see https://github.com/whoenig/crazyflie_ros#installation for the updated instructions.

For crazyflie_ros related problems, it is best to open an issue on github to get help.
by whoenig
Wed Jan 09, 2019 7:45 pm
Forum: Bitcraze
Topic: Real Time Control of Crazyflie with ROS
Replies: 4
Views: 1730

Re: Real Time Control of Crazyflie with ROS

Hi, The article "Flying Multiple UAVs Using ROS" was originally written in 2016 and does not contain information about cmd_hover/cmd_position or goTo because those were developed afterwards. Unfortunately, there is no newer documentation right now. cmd_position sets the current setpoint of the CF to...
by whoenig
Fri Dec 14, 2018 5:56 am
Forum: General discussions
Topic: data export by windows PC client
Replies: 5
Views: 813

Re: data export by windows PC client

If you don't need the data in realtime, I suggest using the uSD deck, which already supports synchronous logging at a much higher data rate than what you can get over the radio, see https://wiki.bitcraze.io/projects:crazyflie2:expansionboards:microsd#data_logging. It is even possible to get this dat...
by whoenig
Fri Dec 14, 2018 5:50 am
Forum: Developer Discussions
Topic: PID data conversion
Replies: 1
Views: 457

Re: PID data conversion

The conversion to PWM happens in the power distribution module: https://github.com/bitcraze/crazyflie-firmware/blob/master/src/modules/src/power_distribution_stock.c#L76-L107. There are several controller options in the firmware - which one are you referring to? The "newest" is a nonlinear controlle...
by whoenig
Thu Nov 08, 2018 2:48 am
Forum: Autonomous flight
Topic: Using Mellinger Controller in crazyflie_ros
Replies: 1
Views: 778

Re: Using Mellinger Controller in crazyflie_ros

You can set the parameter "stabilizer.controller" to 2, which enables the mellinger controller on newer firmwares. To test it with crazyflie_ros, take a look at https://github.com/whoenig/crazyflie_ros/issues/112.
by whoenig
Tue Nov 06, 2018 5:17 am
Forum: Support
Topic: Reproducing YouTube Video (Swarming CrazyFlies)
Replies: 10
Views: 2636

Re: Reproducing YouTube Video (Swarming CrazyFlies)

(Discussed via PM).