Ulog streaming script doesnt work

PX4 Autopilot
1

Hello all, I’ve been working on a ulog file transfer to selected location from pixhawk via usb port. for this purpose, I try the mavlink_ulog_stream.py example under the Firmware/Tool but the script does not return any response. and also there is no error message. How should I try the sample script? where is the step I did wrong? I’m connected to pixhawk via usb port.

2

Hi

Do you want to download logs or to stream logs in realtime?
How do you execute the script?

3

Hi,
With this example script, i want to stream logs in realtime witout using qgorundcontrol. I have tried this script a little while ago in hitl mode. I connected to pixhawk via usb cable and pixhawk connected to frsky radio transmitter. I gave arm command via frsky in this time script has working. There was no output from script. When i unplugged usb connection from pixhawk, I got output below :

Output file name: ./2020-01-13_10-25-20.ulg
Using port /dev/serial/by-id/usb-3D_Robotics_PX4_FMU_v5.x_0-if00
/dev/serial/by-id/usb-3D_Robotics_PX4_FMU_v5.x_0-if00
Connecting to MAVLINK...
Starting log...
Logging started. Waiting for Header...
Header received in 0.74s
Data Rate: 32.5 KB/s  Drops: 0 Traceback (most recent call last):
  File "***/site-packages/serial/serialposix.py", line 501, in read
    'device reports readiness to read but returned no data '

How can i get the log file? Should i send disarm command to reach ulg file?

4

You should already have the file:

The way to stop logging is just to stop the script (via Ctrl-C).

5

Sorry for late response, Solved problem.

Thanks!