Software gets stuck if run before the scanner is ready about sick_scan2 HOT 6 CLOSED

@Kaju-Bubanja

Does the driver really get stuck?
It is normal for the initiation process to finish with the output:

[sick_scan2]: Starting scan data ....

The driver then runs normally and only error or warning messages are displayed on the console.

Have you checked with RVIZ whether Pointcloud messages are visible?

otherwise you can use check on which topics data is sent by using

ros topic list

the topics used by this driver are/cloud or /laser

ros topic echo /cloud

shows the messages on the console.

from sick_scan2.

ros2 topic list shows no topics being published also usually when everything starts correctly it finishes with something like 1/6 something, 2/6 something until 6/6 something and then Software is now ready.... I'm not at work right now and I will send you the log of a correct boot up on Monday. Thank you for the quick reply.

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@michael1309 Including the name, in case you don't get a notification for closed issues
So I just reran the script and even after the sensor fully started the driver stays stuck at the last line from above output script. And ros2 topic list outputs:

/parameter_events
/rosout

Restarting the driver then additionally outputs this to the log:

[sick_generic_caller-1] 
[sick_generic_caller-1] [INFO] [1635151768.576498645] [sick_scan2]: 1 / 6 Packet dropped Software PLL not yet locked.
[sick_generic_caller-1] [INFO] [1635151768.590367272] [sick_scan2]: 2 / 6 Packet dropped Software PLL not yet locked.
[sick_generic_caller-1] [INFO] [1635151768.602938920] [sick_scan2]: 3 / 6 Packet dropped Software PLL not yet locked.
[sick_generic_caller-1] [INFO] [1635151768.616360408] [sick_scan2]: 4 / 6 Packet dropped Software PLL not yet locked.
[sick_generic_caller-1] [INFO] [1635151768.630392536] [sick_scan2]: 5 / 6 Packet dropped Software PLL not yet locked.
[sick_generic_caller-1] [INFO] [1635151768.642977645] [sick_scan2]: 6 / 6 Packet dropped Software PLL not yet locked.
[sick_generic_caller-1] [INFO] [1635151768.643035572] [sick_scan2]: Software PLL is expected to be ready now!

with ros2 topic list outputting \cloud the topic name I chose.

from sick_scan2.

What was the resolution of this issue? I am in a similar situation with MRS1000. I was able to run it a few days ago, so I know what output to expect when it is successfully connected and started. Currently, there is no output after Starting scan data .... even after waiting for a few minutes.

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how to do fix this

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@Loctangba We recommend to use https://github.com/SICKAG/sick_scan_xd for all lidars supported (see https://github.com/SICKAG/sick_scan_xd#supported-hardware). Please don't hesitate to report issues there in case of problems.

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