Question:
$ roslaunch turtlebot3_bringup turtlebot3_core.launch
[ERROR] [1638088954.672047]: Tried to publish before configured, topic id 125
[ERROR] [1638088954.678352]: Creation of publisher failed: Checksum does not match: 7250c1dc0b61c4190e78f528f599285f,427f77f85da38bc1aa3f65ffb673c94c
Answer:
update opencr board ros program.
$ export OPENCR_PORT=/dev/ttyACM0 $ export OPENCR_MODEL=burger $ rm -rf ./opencr_update.tar.bz2 $ wget https://github.com/ROBOTIS-GIT/OpenCR-Binaries/raw/master/turtlebot3/ROS1/latest/opencr_update.tar.bz2 $ tar -xvf opencr_update.tar.bz2 $ cd ./opencr_update $ ./update.sh $OPENCR_PORT $OPENCR_MODEL.opencr
