Group ID's are the way to limit communication between multiple sets of Sender/Display sets. Devices will only communicate with other devices that have the same Group ID number. Senders and Displays have a default Group ID set to 1. If you have multiple sets and do not want them to talk to each other, set a different ID on each set.
To access the user settings menu, click left with the joystick. Scroll down to the Device Group option and center press the joystick to select it. To change the setting, scroll to the Group ID field and center press to select it. Use up/down to change the number and center press when complete.
IMPORTANT: Sender units must have the same Group ID setting or they will not communicate. If you change the display Group ID you must change the Sender Group ID setting as well.
To set Group ID only on the display scroll down to Set Display and select it.
The display can set the Group ID on connected Senders at the same time. To use this you must ensure the following before proceeding:
Sender(s) are powered on
Sender(s) are near the display and you can see it's status light
When the above is complete, check the Set on nodes box, then scroll to Set All and select it. The Sender(s) status light should be solid purple color indicating it is ready. The display will now show the confirmation screen.
If all Senders have a purple status light:
Check the Confirmed box
Scroll to Set All and center press to select it
If any Senders do not have a purple status light:
select the Back button to return to the previous screen
Check the Set on nodes box again
Select the Set All button again
Repeat until all Senders have a purple status light shown
To cancel without setting, hit the reset button on the display. Power off Senders and restart.