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  • Dec 27 2016 20:06

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Hi!, can anyone tell me how to add a camera in default iris gazebo sitl? I want to control it with mavros
Sander Smeets
PX4 has moved to http://slack.px4.io/
Yash Mulgaonkar
Hey Guys, is the FMUv5 hardware specs been released?
Hello , does anyone have used the dronekit to send mocap data to px4? I am a newer, please help ! just a example is very good ! thank you
Anyone familiar with setting up multiple UDP ports to control multiple vehicles in SITL jmavsim?
hi, all. i build firmware of pixhawk with change rcS in init.d folder and upload to pixhawk, but pixhawk can not start up correctly and usb port after 5 secends disconnected, dose anyone can help me please. how can reset pixhawk or other way to upload correct firmware ?
please help
Anyone have issues where certain modules in firmware don't get uploaded to the pixhawk mini?
sander smeets; does pix hawk influence throttle of a flight or it is just used to calibrate the throttle ..also tel if not pix hawk ,does the companion computer can influence throttle during flight ?
anybody can help me with the above question ...
Hello everyone , we customized a program in PIXhawk which is used in quadcopter , and now do we need to re-programme it if we use the same in hexa/octa?
Vasily Evseenko
Hi, I've updated wifibroadcast article to sync with latest release. PX4/Devguide#321
Hi, at the moment, we have a lot of trouble to flash the pixracer out of a Ubuntu virtual machine or from Windows. It doesn't matter, if we use the upload command or QGroundControl. It stops during the upload phase nearly all the time. Only a pure Ubuntu version works. Did anybody have a workaround for that problem?
CAn pix hawk replace PX4 for autonomous drones .?
Sry can pixracer replace px4 ?
Hadi Ahrovani
Multi-Vehicle Simulation
this tutorial say "source your environment" and then enter "roslaunch px4 multi_uav_mavros_sitl.launch":
output is:
roslaunch px4 multi_uav_mavros_sitl.launch
... logging to /home/cv/.ros/log/0dfb88da-e966-11e7-90f0-71f1019dd856/roslaunch-ubuntu-44603.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

Usage: xacro.py [options] <input>

xacro.py: error: expected exactly one input file as argument
while processing /home/cv/src/Firmware/launch/single_vehcile_spawn.launch:
Invalid <param> tag: Cannot load command parameter [iris_1_sdf]: command [/opt/ros/kinetic/share/xacro/xacro.py /home/cv/src/Firmware/Tools/sitl_gazebo/models/rotors_description/urdf/iris_base.xacro rotors_description_dir:=/home/cv/src/Firmware/Tools/sitl_gazebo/models/rotors_description mavlink_udp_port:=14560 > iris_1.urdf ; 'gz sdf -p iris_1.urdf'] returned with code [2]. 

Param xml is <param command="$(arg cmd)" name="$(arg vehicle)_$(arg ID)_sdf"/>
The traceback for the exception was written to the log file
Hello everyone, I need to create a new airframe
But I don't know how to adjust mixer values
for example servo limiting, tail BLDC adjusting etc. if anyone knows please send a message to me
Hi friends,,,, Has anyone worked in Single copter? I am working on pixhawk mini with px4fmu-v2_lpe firmware and finding a bit struggle in PID tuning for that. Will appreciate your all suggestions.
Chenghao Yang
@Ahrovan I found a solution, but I'm not sure.
@Ahrovan PX4/sitl_gazebo#101
I would like to ask if there are equivalent flag from micropilot in Pixhawk. I mean if there is any analogue to
in fly/on ground
Thanks for any help!
hi anybody has the px4fmuv5 hardware schematic?
hello everyone, how to write a mixer file what is the vector and scale factors and offset is it geometrical?

When I compile the PX4 source code of 1.6.2 version, I meet this error. But when I compile the latest version(1.7.3), It can be compiled successfully. Anyone who can help me?

root@ubuntu:~/px4_code/px4_0/xyi_px4# make px4fmu-v2_default
-- CMAKE_MODULE_PATH: /home/yst/px4_code/px4_0/xyi_px4/cmake
-- Nuttx build for px4fmu-v2 on m4 hardware, using nsh with ROMFS on px4fmu_common
-- Build Type: MinSizeRel
Traceback (most recent call last):
File "Tools/tag_to_version.py", line 19, in <module>
minor = res[1]
IndexError: list index out of range
-- PX4 VERSION: 3284b7d
-- CONFIG: nuttx-px4fmu-v2-default
-- The ASM compiler identification is GNU
-- Found assembler: /home/yst/gcc-arm-none-eabi-7-2017-q4-major/bin/arm-none-eabi-gcc
-- Found PythonInterp: /usr/bin/python (found version "2.7.12")
-- Found PY_jinja2: /usr/local/lib/python2.7/dist-packages/jinja2
-- C compiler: arm-none-eabi-gcc (GNU Tools for Arm Embedded Processors 7-2017-q4-major) 7.2.1 20170904 (release) [ARM/embedded-7-branch revision 255204]
-- C++ compiler: arm-none-eabi-g++ (GNU Tools for Arm Embedded Processors 7-2017-q4-major) 7.2.1 20170904 (release) [ARM/embedded-7-branch revision 255204]
-- Adding ROMFS on px4fmu-v2
-- Nuttx build for px4fmu-v2 on m3 hardware, using nsh
-- Configuring done
-- Generating done
-- Build files have been written to: /home/yst/px4_code/px4_0/xyi_px4/build_px4fmu-v2_default
[73/566] Building NuttX for px4io-v2 with nsh
FAILED: cd /home/yst/px4_code/px4_0/xyi_px4/build_px4fmu-v2_default/px4io-v2 && /bin/rm -rf /home/yst/px4_code/px4_0/xyi_px4/build_px4fmu-v2_default/px4io-v2/NuttX/nuttx/nuttx-export && /usr/bin/make --quiet --no-print-directory -C /home/yst/px4_code/px4_0/xyi_px4/build_px4fmu-v2_default/px4io-v2/NuttX/nuttx -r CONFIG_ARCH_BOARD=px4io-v2 export >nuttx_build.log && cmake -E touch /home/yst/px4_code/px4_0/xyi_px4/build_px4fmu-v2_default/px4io-v2/nuttx_export.stamp
stdio/lib_sscanf.c: In function 'vsscanf':
stdio/lib_sscanf.c:419:28: error: this statement may fall through [-Werror=implicit-fallthrough=]
sign = true;
stdio/lib_sscanf.c:420:21: note: here
case 'u':
cc1: all warnings being treated as errors
make[2]: [bin/lib_sscanf.o] Error 1
make[1]: [libc/libc.a] Error 2
[73/566] Building NuttX for px4fmu-v2 with nsh
FAILED: cd /home/yst/px4_code/px4_0/xyi_px4/build_px4fmu-v2_default/px4fmu-v2 && /bin/rm -rf /home/yst/px4_code/px4_0/xyi_px4/build_px4fmu-v2_default/px4fmu-v2/NuttX/nuttx/nuttx-export && /usr/bin/make --quiet --no-print-directory -C /home/yst/px4_code/px4_0/xyi_px4/build_px4fmu-v2_default/px4fmu-v2/NuttX/nuttx -r CONFIG_ARCH_BOARD=px4fmu-v2 export >nuttx_build.log && cmake -E touch /home/yst/px4_code/px4_0/xyi_px4/build_px4fmu-v2_default/px4fmu-v2/nuttx_export.stamp
stdio/lib_sscanf.c: In function 'vsscanf':
stdio/lib_sscanf.c:419:28: error: this statement may fall through [-Werror=implicit-fallthrough=]
sign = true;
stdio/lib_sscanf.c:420:21: note: here
case 'u':
cc1: all warnings being treated as errors
make[2]: [bin/lib_sscanf.o] Error 1
make[1]: [libc/libc.a] Error 2
ninja: build stopped: subcommand failed.
Makefile:164: recipe for target 'px4fmu-v2_default' failed
make: * [px4fmu-v2_default] Error 1


Any one there
@falcon15 are the people on PX4 moving to slack?
Rafael Rodrigues Teixeira
Throne Vault
Anyone using PX4 with Intel Aero RTF ?
@ThroneVault I am but did not play with it much :/
Sean Owens
Yeah, I am right now. Of course you asked that question over a month ago.
Good day, i need info about mag issues on pixracer
where can be found bootloader for pixracer
Why I make px4fmu-v2_default ,it shows error:expected initializer before '_PARAMS' from the
Guys, is there anyone find a method to control the thrust force and torques directly for the drone with PX4?
Vasily Evseenko
Hi, could someone review and apply PX4/Devguide#723 ?
I have the above problem when using STIL, how can I solve it?
My operating system is not ubuntu, but is deepin which is a derivative system of debian
My screenshot appears after typing the following command:
make px4_sitl jmavsim
If I don't do anything, the program will stop at this line:
INFO  [ecl/EKF] EKF commencing GPS fusion
I used to drive the computer for one night and the program still stops here.
Please help me, thank you, I am a newbie.

So I used a stereo camera, a TX2 on top of Pixhawk to achieve fully autonomous drone flight and collision avoidance.

In case someone is also interested, here is how I have done it:https://github.com/generalized-intelligence/GAAS/tree/master/demo/tutorial_1