ArduPilot/pymavlink

zzaurak

@zzaurak

@amilcarlucas okay thanks for the clarification! It's a little hard to find the information, that the PyPi version of pymavlink is built around the ardupilot mavlink fork. Especially since the pymavlink is officially the python binding implementation for mavlink.io - I wanted to implement a simple mavlink camera with python (which by the way is not marked WIP anymore) but the messages i want to use are not yet included in ardupilot/mavlink definitions .... (MAV_CMD_REQUEST_VIDEO_STREAM_INFORMATION etc)

It would be really great if there were either an option for the PyPi package to use the official mavlink message definitions or to just use them by default - or rename the package to pymavlink-ardupilot and have the official release under pymavlink ... that would be waaaay less confusing

i understand that the diversion was way less in the past, hence there weren't many problems, but that simply seems to not be the case anymore

abirdh

@abirdh

Hi, I want to use "SET_POSITION_TARGET_LOCAL_NED" in my python code. What the currect way to write it in the code?

This is simple code I tried but i got AtributeError "module 'pymavlink.dialects.v20.ardupilotmega' has no attribute 'POSITION_TARGET_LOCAL_NED'"

autopilot.mav.command_long_send(
autopilot.target_system, # autopilot system id
autopilot.target_component, # autopilot component id
mavutil.mavlink.SET_POSITION_TARGET_LOCAL_NED, # command id,
0, # confirmation
0, #
1,1,MAV_FRAME_BODY_OFFSET_NED,0b0000111111000111,0,0,0,0,0,0,2,2,0,0,0,0 # unused parameters for this command
)

My problem is incorrect syntax? or maybe my installed pymavlink is not in the currect place?

Ali Raza Syed

@sudo-raza

Does anyone have resources on how to work with the hil_actuator_control_send function? I am trying to control a simulated quadrotor in jmavsim, however sending the HIL_ACTUATOR_CONTROL MAVLINK message doesnt apear to make the drone move or anything.

hopekkl123

@hopekkl123

Friends, I want to know that the mav attribute in mavutil.py comes from the classes and methods under that py file. I am a novice and I am troubled by this.

Amilcar Lucas

@amilcarlucas

@hopekkl123 ???

What is your question?

kepugol

@kepugol

Hello together!
I see that the last entry here is very old, but it's worth a try.
We built a drone based on RPi4 and Navio2, added two Arduinos for redundant proximity where one sends the distances of 4 SRF08 (front, right, back, left ) + 1 SRF05 (altitude) and the other the distances of 5 MB1202 (up, front-right, back-right...). We have a DHT11 sensor that is also connected to one of the Arduinos and we want to send the temperature and humidity to the Raspberry Pi, where these values should be written to a database (via python3-script).

Our problem ist that we dont't know how to divide these data from the sensor-/heartbeat-MAVLink-massages.
So our questions are:

Arduino: does it make sense to use Serial.print(hum/temp)? or
Arduino: should it be sent by using Serial.write(hum/temp)?
is it even possible?
how to split/read in our python3 script?
is it possible to insert the values into the MAVLink-message and read it with the python-script?

Thank you in advance and special thanks to patrickpoirier51 whose "Arduino Controler for multiple I2C VL53L0 TOF range finder" (github) helped us understand MAVLink enough to use it!

Amilcar Lucas

@amilcarlucas

development has moved to discord

kepugol

@kepugol

ok, thank you

DanBerge

@DanBerge

I'm not very well versed in Python, but I'm trying to use pymavlink to communicate with a Gimbal that uses Mavlink 2. My issue is that the functions I'm using appear to be using the improper order when they are transmitted to the gimbal. Do I have something set up incorrectly?

For instance, con.mav.param_request_read_encode(0,0,"TEST",-1).format=='<hBB16s' when the format should be <BB16sh> I believe.

hopekkl123

@hopekkl123

@amilcarlucas My purpose is to achieve mission load and let the drone take off normally at the station,
This is my code. When I run # looping to send each waypoint information, I can only send the 0th one, and then it freezes. Javmsim shows the operating timeout display. (My environment is: python3.6 jmavsim simulation system ubuntu)

GRS26

@GRS26

Hello

I just started learning dronekit, and I want to know how to use mavlink inside a script, where should I start?

Amilcar Lucas

@amilcarlucas

@hopekkl123 development has moved to discord

@GRS26 development has moved to discord

@DanBerge development has moved to discord

GRS26

@GRS26

what is the link?

GRS26

@GRS26

@amilcarlucas

Amilcar Lucas

@amilcarlucas

google "discord pymavlink"

Armen Yenokyan

@arare94

hello everyone. How we can check the connection status between pymavlink and radio modem, when I select the radio com port, I cant check the status of connection, when droneside radio is connected well I see the messages, but when I disconnect it, program stops after connecting radio it continues to show. Is there any feature to check connectivity of 2 radios? Thanks

Codaero

@Codaero

hey guys I just have a question, how do you get the message response from the GET_MESSAGE_INTERVAL command. i am trying to print the message interval for a particular message

Canadin Underwater Inspection Services

@CanadianUnderwa_twitter

Hi I keep getting insues

snyde@MSI ~
$ cd ~/ardupilot/ArduCopter

snyde@MSI ~/ardupilot/ArduCopter
$ ../Tools/autotest/sim_vehicle.py --map --console
Traceback (most recent call last):
File "../Tools/autotest/sim_vehicle.py", line 30, in <module>
from pymavlink import mavextra
ModuleNotFoundError: No module named 'pymavlink'

snyde@MSI ~/ardupilot/ArduCopter
$ pip install "pymavlink==2.4.6"
Collecting pymavlink==2.4.6
Downloading pymavlink-2.4.6.tar.gz (3.5 MB)
|████████████████████████████████| 3.5 MB 629 kB/s
Requirement already satisfied: future in /usr/lib/python3.6/site-packages (from pymavlink==2.4.6) (0.18.2)
Requirement already satisfied: lxml in /usr/lib/python3.6/site-packages (from pymavlink==2.4.6) (4.6.2)
Using legacy 'setup.py install' for pymavlink, since package 'wheel' is not installed.
Installing collected packages: pymavlink
Attempting uninstall: pymavlink
Found existing installation: pymavlink 2.4.14
Uninstalling pymavlink-2.4.14:
Successfully uninstalled pymavlink-2.4.14
Running setup.py install for pymavlink ... done
Successfully installed pymavlink-2.4.6

snyde@MSI ~/ardupilot/ArduCopter
$ cd ~/ardupilot/ArduCopter

Winning WIndows 10 and have eveerthing installed on the D: any sudjestions

Amilcar Lucas

@amilcarlucas

@CanadianUnderwa_twitter development has moved to discord

@Codaero development has moved to discord

@arare94 development has moved to discord

Canadin Underwater Inspection Services

@CanadianUnderwa_twitter

what is discord

GRS26

@GRS26

it's like skype, but more like a social media too

Chinmay

@spellftw

Hi guys, I want to launch mavros node so that I can give fcu_url to gazebo simulator. Is this possible? I don't want to use the SITL provided as I am working with my own robot. I want to use ardupilot for my robot and simulate in gazebo. Any help would be appreciated.

kyrlon

@kyrlon

Hello I am very new to anything mavlink. What would be the best route to getting real time data on UAS data such as pitch, roll, and yaw ?

Stavros

@stavros:mozilla.org

[m]

Hello

I'm running a script from the PyMavlink examples to get all the parameters from the board, and it works fine except it stops at STAT_RUNTIME and keeps trying to get it over and over. Why does that happen, and how can I prevent it?

RhinoAus

@RhinoAus

Is there a helper function in pymavlink to turn a message string ie RAW_IMU {time_usec : 8723974014, xacc : 0, yacc : 0, zacc : -1001, xgyro : 4, ygyro : 3, zgyro : 4, xmag : 197, ymag : -33, zmag : -572, id : 0, temperature : 2300} back into a message object?

Buzz

@davidbuzz

https://ardupilot.org/discord

André Kjellstrup

@AndKe

@Buzz It a pity that Discord is such a bad spyware. They have been notified about three years ago, then they added a switch to disable "monitoring for games" - Even with all "monitor games" features disabled, it polls processes at about 100hz and snoops around file system (limited by the snap container.) - anyway ... Discord is very bad spyware, and it is a pity that any Open Source project uses it. The spy-switch does absolutely nothing outside the app. (only affects the visual presentation inside Discord app)
try for yourself :)

Sudhanshu Kumar Singh

@Sksingh97

Hi Everyone i am using pyMavlink to send commands to SITL.
How can a confirm that my previous command execution is complete.

Eg: I want my drone to take off at 10 and once take off completed i can send my dron to certain lat long position.

Problem: If i execute take off and didn't wait it to be completed then my next command will not work.

Thanks in advance. Any help is apprenticed

jinydoggebi

@jinydoggebi

@CanadianUnderwa_twitter

python -m pip install --upgrade pymavlink
Please do a version-specific dependency check.
I had the same problem, but I solved it.
The final version was 2.2.8

....
return installer(requirement)
File "/usr/lib/python3.8/site-packages/setuptools/dist.py", line 732, in fetch_build_egg
return fetch_build_egg(self, req)
File "/usr/lib/python3.8/site-packages/setuptools/installer.py", line 128, in fetch_build_egg
raise DistutilsError(str(e)) from e
distutils.errors.DistutilsError: Command '['/usr/bin/python', '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', '/tmp/tmpxywwrwzf', '--quiet', 'future']' returned non-zero exit status 1.
----------------------------------------
WARNING: Discarding https://files.pythonhosted.org/packages/2e/92/0d7b276851a9d99c26cad7c301fd55dc68d77af7abc557ee4795e62a9c72/pymavlink-2.2.9.tar.gz#sha256=a8b875a9ecfa9aea5588743365a07f732f9c0bb762ecc971a5f91046f00f910b (from https://pypi.org/simple/pymavlink/). Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
Using cached pymavlink-2.2.8.tar.gz (3.0 MB)
Collecting future
Using cached future-0.18.2.tar.gz (829 kB)
Requirement already satisfied: lxml in /usr/local/lib/python3.8/site-packages (from pymavlink) (4.6.3)
Using legacy 'setup.py install' for pymavlink, since package 'wheel' is not installed.
Using legacy 'setup.py install' for future, since package 'wheel' is not installed.
Installing collected packages: future, pymavlink
Running setup.py install for future ... done
Running setup.py install for pymavlink ... done
Successfully installed future-0.18.2 pymavlink-2.2.8

FREE@DESKTOP-5T234S7 ~/ardupilot/ArduCopter

jdslashdj

@jdslashdj:matrix.org

[m]

Hi! I am very new in this programming drone thing, so I will be so happy if someone can help me.
I am learning about 2 weeks constantly everything about MAVLink and ArduPilot.
I need to do the programming part of the drone, where we can be able so send UDP/TCP packets to a wifi-module ESP8266, which is on a ESP-WROOM 02U.
I am doing a good job so far, but I can't find any example of how I actually do the part where I am sending MAVLink messages. I watched every single video on youtube, I read everything and I will be so much happier if someone from here can help me.

yc541

@yc541

@davidsturrock Have you solved this? I'm getting a similar issue when trying to get attitude from a PX4 connected via USB, the attitude data is 15ish seconds late.

Hi everyone, I'm needing help receiving the relative altitude of my simulated drone using pymavlink. I have a script running on a RPi which is connecting to SITL via tcp. My code is as follows:
master = mavutil.mavlink_connection('tcp:IPaddress:5762')
msg = master.recv_match(type="GLOBAL_POSITION_INT",blocking=True)
relative_alt = msg.relative_alt
I successfully get a value back, but have noticed that the altitude is outdated. My script successfully changes the altitude of the drone via RC commands and QGC accurately reflects the changing altitude in real time, but the altitude being received by my Pi lags by tens of seconds. Anyone know what might cause this lag?

Paul

@PRIMETSS

@jdslashdj:matrix.org Yes can be hard to find a complete write up (What language you using?) . But study this, so you know about MAVLink protocol, V2 (typically communication starts as V1 and swaps to V2), Learn about the need to keep track of SEQ #, as each System & Component need to increment this when sending a new message, other wise MP will show errors and quality of data stream will go down (eg 100%->30%), Read about (Routing) SystemID and ComponentID as this is where a message is targeted to.
Some reading below

https://mavlink.io/en/
https://discuss.ardupilot.org/t/mavlink-step-by-step/9629

André Kjellstrup

@AndKe

How can I drop processing packets from GCS? (this RPAS have two GCS's on two telemetry links) Let's say link1 and link2 , the link2 gives me data from the SYSID (RPAS), and 255(GCS on link1)

how can I check which SYSID the recieved packet comes from? The essential code I use is here:

              msg = master.recv_match(blocking=False, timeout=1)
              if not msg:
                  continue
              type = msg.get_type()

djmads08

@djmads08

Hi All, installed everything as per the tutorials. Says I already have satisfied the PyMavLink requirement but get this error when trying to run the sim_vehicle error:

Traceback (most recent call last):
File "sim_vehicle.py", line 30, in <module>
from pymavlink import mavextra
ModuleNotFoundError: No module named 'pymavlink'

Any idea? Really need help with this. I have MavLink installed and runs fine, but just can't get it to initiate this.

OmarTheMostWanted

@OmarTheMostWanted

super new noob here I'm new both to python and mavlink, in mavextra there is a function:
def mag_heading(RAW_IMU, ATTITUDE, declination=None, SENSOR_OFFSETS=None, ofs=None)

I'm not don't know where to get RAW_IMU. I saw it in the mavlink messeges list , but I really don't know much.

can someone please help me? I have been at this for hours and no progress.

my end goal is to get the heading/compass reading (value from 0 to 360)

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The final version was 2.2.8

FREE@DESKTOP-5T234S7 ~/ardupilot/ArduCopter