unable to contact ROS master at [http://{10.0.0.xxx}:11311] The traceback for the exception was written to the log file

[Paulino1956]

got this message:" unable to contact ROS (running on Melodic) master at [http://{10.0.0.xxx}:11311] The traceback for the exception was written to the log file" after running on shell 1 pi@raspberrypi:~ $ roslaunch turtlebot3_bringup turtlebot3_robot.launch

while open shell 2 (master) running $roscore

at screen:

NODES

auto-starting new master process[master]: started with pid [14369] ROS_MASTER_URI=http://10.0.0.xxx:11311/

setting /run_id to 6972849e-6bd0-11eb-9cce-d8c0a6261e0f process[rosout-1]: started with pid [14380] started core service [/rosout] (STOPPED HERE)

Thanks in advance for you help !

[ROBOTIS-David]

@Paulino1956

Hi, Paulino1956

Thank you for opening the issue on here.

1. Are you using Raspbian ? If so, the suggested OS for the SBC is the Ubuntu 18.04.3 Preinstalled Server ARM64 for Raspberry Pi3.

2. Make sure that the Remote PC and SBC (TurtleBot3) are working under the same wifi address. See Network Configuration to set the network. Note that, you need to select the proper ROS version in the e-Manual.

3. You can directly ask your inquiry to the issue section on the TurtleBot3's github section. One of engineer will address your issue as soon as possible.