Thank you for reaching out!
While this is not possible to achieve via WebUI, it can be done via SSH/CLI.
To achieve this, first, a command to start the scan will need to be sent:
ubus call blesem "scan.start"
The scan may take around 6 seconds (depending on the number of devices and what data is needed). Then this command can be used to get the list of devices:
ubus call blesem "scan.result"
If only MAC addresses of Bluetooth devices are needed, then the returned results are already usable after 4-5 seconds, however, if names are needed as well, the process may take longer.
The received data could be stored in a custom Modbus register, and then transferred to your server using Data to Server feature.
An alternative could be to use JSON-RPC and gather this data using requests directly from your server, where the Bluetooth devices will be processed.
Hope you find this information useful!