2021-05-06 01:19:47 usfmel

Hello,

I am trying to set up a Turtlerobot 3 robot with ubuntu 18.04 and ROS Melodic. Everithing seems ok except for the installation of ubuntu 18.04 on the Raspberry Pi 3. I tried to follow the guidelines in

https://emanual.robotis.com/docs/en/platform/turtlebot3/sbc_setup/#sbc-setup

...so I burned Ubuntu 18.04.4 server image into the SD card, as recommended. I was able to start up the robot and to remotely visualize maps built with the lidar, so everithing seemed to work correctly... until the robot went irresponsive after a few minutes. As the same problem reappeared every time I tried to use the robot, I connected the monitor to it and discovered that the SBC crashed; I attach two files with pictures of the trace. By searching with google I found a similar issue (now closed):

https://github.com/ROBOTIS-GIT/turtlebot3/issues/580

    This issue was reported to be solved by replacing 18.04.4 with 18.04.3 (against the recomendation in emanual), so I did that, and managed to start up the SBC with Ubuntu 18.04.3 server. However, after I upgraded the OS (sudo apt-get upgrade) the wifi interface failed to work. After some research I found that the driver did not load properly with the upgrade because a seemingly non-trivial problem. Obviously the robot is useless without the wifi.

          Now I wonder which way to take to set up the SBC.  Should I try to use 18.04.3 by fixing the wifi problem somehow?   May be there is a hardware problem that causes the hang-up in 18.04.4?   Should 18.04.4 work in turtlebot 3?

          Thanks in advance.

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