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unable to contact ROS master at

asked 2020-01-28 09:58:07 -0600

xinxinxin gravatar image

updated 2020-01-28 11:37:43 -0600

gvdhoorn gravatar image

Hi, This is a simple question but troubled me hours.

I am following the turtlebot3 tutorial. Setting up the bashrc of host-pc with PC IP address 192.168.48.132 :

export ROS_MASTER_URI=http://**192.168.48.132**:11311
export ROS_HOSTNAME=**192.168.48.132**

Setting up the bashrc of turtlebot3 with its own IP 192.168.137.192 :

export ROS_MASTER_URI=http://**192.168.48.132**:11311
export ROS_HOSTNAME=**192.168.137.192**

Then, run the roscore on remote PC with the printout like this:

Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://192.168.48.132:38089/
ros_comm version 1.12.14

SUMMARY

PARAMETERS
 * /rosdistro: kinetic
 * /rosversion: 1.12.14

NODES

auto-starting new master
process[master]: started with pid [2167]
ROS_MASTER_URI=http://192.168.48.132:11311/

setting /run_id to ee0e1f5e-41df-11ea-8d67-000c29f89067
process[rosout-1]: started with pid [2180]
started core service [/rosout]

then run

roslaunch turtlebot3_bringup turtlebot3_robot.launch on turtlebot3

get 'unable to contact ROS master at [http://192.168.48.132:11311/]'

the bashrc setting ip is the same but why the turtlebot cannot find the ros master?

Thank you

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2 Answers

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answered 2020-01-28 10:27:41 -0600

xinxinxin gravatar image

solved. It is because I am using Virtual Machine. The virtual ubuntu's ip address is 192.168.48.132 which is not the real wireless router address which starts with 192.168.137.xx

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So How did you solve this problem? Can the virtual machine connect to ROSMASTER?

Siemen gravatar image Siemen  ( 2021-04-01 07:49:27 -0600 )edit
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answered 2021-05-22 15:39:07 -0600

ike29 gravatar image

I am having the same issue. Can i get some assistance with it? pi@raspberrypi:~ $ ping hgos ping: hgos: Temporary failure in name resolution pi@raspberrypi:~ $ roslaunch turtlebot3_bringup turtlebot3_robot.launch ... logging to /home/pi/.ros/log/1bcb02d8-bb3b-11eb-bb5a-b827eb2ac6f9/roslaunch-raspberrypi-2210.log Checking log directory for disk usage. This may take awhile. Press Ctrl-C to interrupt Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://192.168.1.3:45445/

SUMMARY

PARAMETERS * /rosdistro: kinetic * /rosversion: 1.12.14 * /turtlebot3_core/baud: 115200 * /turtlebot3_core/port: /dev/ttyACM0 * /turtlebot3_core/tf_prefix: * /turtlebot3_lds/frame_id: base_scan * /turtlebot3_lds/port: /dev/ttyUSB0

NODES / turtlebot3_core (rosserial_python/serial_node.py) turtlebot3_diagnostics (turtlebot3_bringup/turtlebot3_diagnostics) turtlebot3_lds (hls_lfcd_lds_driver/hlds_laser_publisher)

ERROR: unable to contact ROS master at [http://192.168.1.2:11311] The traceback for the exception was written to the log file

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Asked: 2020-01-28 09:58:07 -0600

Seen: 762 times

Last updated: Jan 28 '20