PX4/PX4Devguide

PX4 Devguide GitBook

Abhishek Aggarwal

@myeabhishek

Hi Guys,
I am using bottle_drop module in PX4 to drop a payload from a moving Multicopter. I am using "bottle_drop drop" command from NSH shell to drop the payload. The problem is that I am not receiving any PWM output on any of the AUX pins required for my release mechanism on issuing this command.

I have enabled and started this module for multicopters as I understand it was intended for fixed wings. Even then it should have no problem in generating a PWM output at the required time when this command is given.

Please help!

Sean D Matthews

@Seanmatthews

can anyone give me a little clarification on SET_POSITION_TARGET_LOCAL_NED— in specifying the type_mask, different bits direct the controller to ignore different dimensions. What does it mean to ignore a particular position/velocity/acceleration dimension?

Al Bee

@abencomo

@Seanmatthews , details here:
https://github.com/PX4/Firmware/blob/master/src/modules/mavlink/mavlink_receiver.cpp#L850-L865
Discussion here:
http://discuss.px4.io/t/offboard-takeoff-land-loiter-via-set-position-target-local-ned/2648

Sean D Matthews

@Seanmatthews

@abencomo yeah, i’ve seen all the pages and discussions on it. My question is more simplistic— that is, by ignoring, say, the X dimension, we’re telling the controller to disregard all commands in the X dim? Or disregard error in the X dim when going to a point? Or ignore X until the vehicle has achieved active dims? Similarly, what does that mean for velocity/acceleration in the X dimension?

Ashfaqur Rahman

@aagontuk

Encountering a silly problem. I have downloaded the latest daily build of QGC(2017-06-17) and from there installed PX4 firmware v1.6.3 into my board. But after rebooting in the summary tab QGC is showing my firmware version as v1.6.1dev. What is the problem? How can I be sure about my firmware version?

eric1221bday

@eric1221bday

@aagontuk my qgroundcontrol(2017-06-12) as well s the latest stable build definitely was able to show the correct firmware version

Are you sure you checked out the correct branch when you cloned the Firmware repo?

virenbajaj

@virenbajaj

Hey guys what is a good software package for the pixhawk that includes SLAM and path planning algorithms? I'm trying to look into path planning algorithms that use machine learning and I so want to get a standard implementation of autonomous planning after which I can modify the path planning algorithms.

Ashfaqur Rahman

@aagontuk

Actually the problem is if I upload the latest stable release from QGC via "firmware -> PX4 Flightstack -> stable release" QGC does all the procedures(download + erase + upload). But when board reboots, somehow it restores previous uploaded version(Or QGC fakes everything). But if I upload the firmware by downloading releases from github and doing "firmware -> PX4 Flightstack -> custom firmware" everything works just fine. Is it a QGC bug?

@eric1221bday

rollysing

@rollysing

@aagontuk

Encountering a silly problem. I have downloaded the latest daily build of QGC(2017-06-17) and from there installed PX4 firmware v1.6.3 into my board. But after rebooting in the summary tab QGC is showing my firmware version as v1.6.1dev. What is the problem? How can I be sure about my firmware version?

@aagontuk

Actually the problem is if I upload the latest stable release from QGC via "firmware -> PX4 Flightstack -> stable release" QGC does all the procedures(download + erase + upload). But when board reboots, somehow it restores previous uploaded version(Or QGC fakes everything). But if I upload the firmware by downloading releases from github and doing "firmware -> PX4 Flightstack -> custom firmware" everything works just fine. Is it a QGC bug?

I concur. Mine was QGroundControl Development HEAD:54c92f75c 2017-06-22 02:20:17 -0300. I decided to try Custom Firmware so I downloaded the Stable Firmware.zip but there are 13 PX4 files in there. Which one is the stable verison for Quad Plane and Quad Ranger? Any assistance or direction is highly appreciated.

MirkoSKat

@MirkoSKat

Hi, I'm working with px4 for NuttX (Pixhawk) and while I'm compiling, all warnings are treated as errors, how can I turn this behaviour off (not for contributing, but for developing by myself)?

Eike

@ecmnet

Hi, just a short question to the experts: Is failsafe mode published via MAVLINK somehow?

Sorry, wrong thread

Deniz Kalaslioglu

@deksprime

Hello everyone, has anyone tried this long Wi-fi Broadcast as instructed on the Dev Guide? Although I have managed to set up the wi-fi antennas as instructed and receiving UDP packets from the TX, I can't seem to display the video on the RX side. Is it possible that the person who have written the page has more info on this topic???

rollysing

@rollysing

Is the Next-Gen MS5525 Airspeed Sensor supported by PX4 Pro? https://store.mrobotics.io/mRo-Next-Gen-MS5525-Airspeed-Sensor-NEW-p/mro-ms5525v2-mr.htm

perceptive558

@perceptive558

The flight plot cannot open ulog files, could someone give some help

semsimsom

@semsimsom

Hi everybody,I have question about read RPM of OS motor in mission planner. For test I connect pwm of rc receiver to AUX 5 and enable RPM1, but I can't read it. Dose anyone work correctly or can help me?

Is the pwm of rc receiver different between rpm sensor?

semsimsom

@semsimsom

I forgot that to tell, I disabled Relay parameter for AUX5

And I have a pixhawk :-) :-)

Vlad Radulescu

@RealityVoid

This message was deleted

FantasyJXF

@FantasyJXF

Does anyone know did the files in Firmware/src/modules/px4iofirmware works or how does it works? Since this folder is not contained in nuttx_px4fmu-v2_default.cmake

pythonmobile

@pythonmobile

Can anyone tell me what could have been wrong with this accident: http://bit.ly/2vfFkM7 - The Octocopter just flipped. ESCs were calibrated. I checked the CW/CCW configuration, seems right. Pixhawk calibration seemed right. Hopefully someone experienced can tell what went wrong?

pythonmobile

@pythonmobile

Seems like that video link does not work: Here is the correct one: http://bit.ly/2w3hvoz

ptit-tom

@ptit-tom

Hi, someone know what is Companion Link in the param SYS_COMPANION, please ? It's enable onboard's mavlink stream but I don't understand what is this... :/

@pythonmobile It's look like propellers are in the wrong way

pythonmobile

@pythonmobile

@ptit-tom indeed there was a cw-ccw problem. It's fixed. Thanks.

naveenT1010

@naveenT1010

Hi!, can anyone tell me how to add a camera in default iris gazebo sitl? I want to control it with mavros

Sander Smeets

@sanderux

PX4 has moved to http://slack.px4.io/

Yash Mulgaonkar

@yashm

Hey Guys, is the FMUv5 hardware specs been released?

lalal321

@lalal321

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

cs147

@cs147

Anyone familiar with setting up multiple UDP ports to control multiple vehicles in SITL jmavsim?

semsimsom

@semsimsom

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 ?

semsimsom

@semsimsom

please help

cs147

@cs147

Anyone have issues where certain modules in firmware don't get uploaded to the pixhawk mini?

adamgilchristk

@adamgilchristk

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 ...

adamgilchristk

@adamgilchristk

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

@svpcom

Hi, I've updated wifibroadcast article to sync with latest release. PX4/Devguide#321

MirkoSKat

@MirkoSKat

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?

adamgilchristk

@adamgilchristk

CAn pix hawk replace PX4 for autonomous drones .?

Sry can pixracer replace px4 ?

Hadi Ahrovani

@Ahrovan

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

mehmetemin5

@mehmetemin5

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

rahulsharma11

@rahulsharma11

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

@YCH188

@Ahrovan I found a solution, but I'm not sure.

@Ahrovan PX4/sitl_gazebo#101

alexx600

@alexx600

Hello!
I would like to ask if there are equivalent flag from micropilot in Pixhawk. I mean if there is any analogue to
PIC/CIC
in fly/on ground
Link
Thanks for any help!

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