Arn't most scanners set by default to SPP and not HID, SSP mode didn't even cross my mind. I just opened up a new scanner, connected via Bluetooth and scanned using Erels chat example.
Anyway, if it's a standard scanner it comes with a booklet/sheet with barcodes inside. Marvin can use the barcodes in the booklet/sheet to change from HID mode to SPP mode.
Cheers