Using R or Python to directly manage pixhawk flight logs?

🧪 Flight Testing & Log Analysis
1

Hello,

I am new here, please forgive me if this is not the right place to ask this question.

I have a fleet of 6 hexacopters that have 10+ log files from test flights and operations. I have downloaded the flight logs via mavlink onto my computer, and have 6 folders (one for the flight logs of each copter).

I’m wondering if there is a method to manipulate these data to generate a report that shows the history of motor performance (average RPM for each motor for each flight), or battery voltage draw (average V draw per minute), or even average waypoint error for each flight. Essentially, I’d like to have full access to plot these data to generate a graph that had waypoint error on the y axis and # of satellites on the x.

I come from a statistics and environmental datascience background, R is my preferred language. Is python better suited to this task? I’d be grateful for any suggestions or links to existing resources.

Thank you for your help.

2

I would think Python is the easier choice just because there is already some tooling for it (e.g. https://github.com/PX4/pyulog. https://github.com/PX4/flight_review).

However, you can always just export to csv using pyulog and then import it into R to do whatever :slight_smile:.

3

Hi Julian,

Thank you for your response.

I was able to install the pyulab (after updating the my outdated pip) and tried to run this line in the command prompt.

C:\Users\bears>ulog2csv “C:\Users\bears\Desktop\example_log.log”

I got an error, it seems that the pyulog is intended to read a Ulog file.

Upon further searching, I have found pymavlink and mavexplorer. I’m not sure if these may be useful.

I realize I should have specified in the first message- I have very many .log files from using mission planner and pixhawks.

Thank you for your help

4

Ok, so you’re actually using ArduPilot and will probably find more info there:


https://ardupilot.org/copter/docs/common-downloading-and-analyzing-data-logs-in-mission-planner.html