can generic Bluetooth dongle be used for printers that support printing over Bluetooth?
问题 I have tried using a Bluetooth dongle (Advik) with my "KodakESP-3+2445" printer. I have created an Android client to connect to this printer. I select a UUID for OPP (Object Push Profile) and was able to obtain a BluetoothSocket and 'socket.write' a file to the printer. However, no print out was obtained from the printer. I tried other Bluetooth UUID such as (BIP, BPP, Direct Printing, SPP etc), but socket connection fails for each of these profiles, except OPP (Object Push Profile). I