Here is a quick video on how to allow temperature fields to only use Bluetooth probes.
From the Web-App go to forms, select the form you would like, from the form builder click on configure and check the box next to "Require temperature fields to use Bluetooth probes" and make sure to click 'Publish' to save your edits in the top right-hand side.
Important Please Note*
When choosing this option if the Bluetooth probe is not working or operating properly, the submitters will not be able to submit the form. We suggest having another backup probe to capture the temperature if this occurs.