Hello,
I would like to understand the purpose of your desired settings because what you currently explained is that you are trying to connect BLE sensor to BT3 connection, which will not work. This connection is meant for devices like phones where you can install apps like Teltonika FMBT, BT Terminal App and etc. which you use to see device live data and some basic configurations. If you need to connect your beacon to the device, please see the following page containing instructions on how to set up BLE beacons and sensors from third party providers, here.
Kind regards.