Can not subscribe any topics from a remote PC w/o modifying /etc/hosts

[robograffitti]

Wi-Fi: ROBOTIS-OP-Share
$ROS_MASTER_URI = http://10.42.0.1:11311
$ROS_IP = 10.42.0.155
$ROS_HOSTNAME = 10.42.0.155

Then, I have to add this line in /etc/hosts:
10.42.0.1 robotis-op3

Without this setting, a remote PC can not communicate with a robot.

[kaym9n]

Thank you for your support.
To solve this problem, user need to add the hostname(robotis-op3) in /etc/hosts of remote pc like the way you said, or modify the script of robotis-op3 as below.

1. Connect to ROBOTIS-OP3

2. Open the script which run automatically the robot in your favorite editor.
   $ sudo xed /usr/sbin/OP3-demo-start

3. Modify like below

• from export ROS_HOSTNAME=$(hostname)
• to export ROS_HOSTNAME=10.42.0.1

[robotpilot]

This issue will be closed since there were no actions for a while. You can reopen this issue to show this issue to the users whenever. Thanks.