how to connect to an already running roscore from a tethered usb device

edit

hi

i am trying to connect to an already running roscore with a tethered usb device.

situation is as follows:

1. i have a running roscore on a ubuntu machine
2. after the roscore is up, i connect an android tablet to the computer and create a network connection using usb tethering
3. i am using ros android to communicate with the roscore

note:

• connecting the tablet with usb tethering creates a new usb network device over which i want to talk to the roscore
• the tablet may be connected and disconnected several times without re-starting the roscore
• also maybe other clients connect to the master using a ethernet connection

has anyone an idea how to do that ? how would the ros network setup look like (master uri / ros ip / ros hostname) ?