Basically, the commands are as follows. The XXXXXXXXXXXXXXXX needs to be replaced with your Plex Token. You can find this token by finding media in your library, clicking Info from the … menu, and then View XML at the bottom of the popup. Look in the URL (Address) box of your browser and the Plex Token is at the end of URL. The examples below assume you are on the same machine that Plex Media Server is running on.
Use this command to find out the key of your DVR (X):
curl http://localhost:32400/livetv/dvrs?X-Plex-Token=XXXXXXXXXXXXXXXXXXXX
Use this command to find out the key of the device that is not already added to your DVR (Y):
curl http://localhost:32400/media/grabbers/devices?X-Plex-Token=XXXXXXXXXXXXXXXXXXXX
Use this command to add the second device to your DVR:
curl -X PUT http://localhost:32400/livetv/dvrs/X/devices/Y?X-Plex-Token=XXXXXXXXXXXXXXXXXXXX
Now go to Settings | DVR | Manage Channels for the new tuner and map each channel to the drop down channel guide source.
