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192.168.1.105 is not the IP of your Odroid (any more).

It could have been earlier, but according to your hostname -I output, it is now 192.168.1.225.

You're setting ROS_HOSTNAME=192.168.1.105, which makes roscore try and use that to connect to "its own server". This will obviously fail.

Try to set ROS_HOSTNAME to 192.168.1.225. Save .bashrc, open a new terminal and try again.

192.168.1.105 is not the IP of your Odroid (any more).

It could have been earlier, but according to your hostname -I output, it is now 192.168.1.225.

You're setting ROS_HOSTNAME=192.168.1.105, which makes roscore try and use that to connect to "its own server". This will obviously fail.

Try to set ROS_HOSTNAME to 192.168.1.225. Save .bashrc, open a new terminal and try again.

Note: using ROS_HOSTNAME like this is actually why things are failing for you. You can avoid this by configuring a static IP for your Odroid (either locally on the device itself, or by making a DHCP "reservation" in your router).

The better alternative would be to make sure you have a working DNS on your network.

That would allow you to use hostnames instead of IP addresses. The IP addresses can then change, but the hostnames stay the same.

A middleground could be to use /etc/hosts: you configure the mapping IP<->hostname there manually. You'd still be responsible for keeping that file up-to-date though.

A third alternative could be to use Avahi to do name resolution for you. See wiki/ROS/NetworkSetup: Name resolution - Using machinename.local on the ROS wiki for some more info on that.

And make sure to check the wiki/ROS/NetworkSetup page for more general info about how to configure your network correctly.