How to know what log file topics are equal to Mavlink commands? HIGHRES_IMU and LOCAL_POSITION_NED

PX4 Autopilot
1

Hi there,

I am trying to get to know what values from my .ULG log file from my pixhawk 4 mini match the same values that appear on my pymavlink script when I print:

HIGHRES_IMU x,y,z gyro values
HIGHRES_IMU x y z acceleration values
LOCAL_POSITION_NED vx vy vz values.

Can someone confirm that in the case of the HIGHRES_IMU the gyro values are the ones in the angular_velocity topic, then the acceleration values are the ones in the vehicle_acceleration topic, and the vx vy vz values are the ones in the vehicle_local_position topic?

I am asking this as I don´t know how to ensure that both my script commands and the .ULG file topic are showing the same values.

Thank you!

2

Hi!

The way to check what data is used, is to look into what is copied into the messages, here:

e.g. for HIGHRES_IMU: PX4-Autopilot/HIGHRES_IMU.hpp at 89bb4622eff78d061b076c9f49dd97d0f4dbb689 · PX4/PX4-Autopilot · GitHub

3

Is there a way to check this in python? I have zero experience with C++. What kind of output is that code giving? I just want to know what is the topic in the .ulg containing the same things as I am trying to print.

Thank you for the answer!

4

Calling for help! @JulianOes :thinking::thinking:

5

No, the translation happens in C++, Python just forward MAVLink but doesn’t translate uORB, so nothing I can do about that.