The Serial Port Profile (SPP) is a Bluetooth protocol used to emulate a serial cable connection (RS-232) over Bluetooth.
This usually means the baud rate or the "Emulation" setting in the driver properties doesn't match the printer's hardware. Set it to "TSC" or "POS" depending on your manual. Why Correct Drivers Matter for Shipping jlspp driver link
If you've tried these steps and still see the "Unknown Device" yellow exclamation mark, let me know: Your (e.g., ASUS X455YA) Your Windows version (10 or 11) If you recently connected a new Bluetooth device JL_SPP Driver for ASUSTeK - X455YA - DriverIdentifier The Serial Port Profile (SPP) is a Bluetooth
) in your Windows Device Manager under "Other Devices" with a yellow exclamation mark, it refers to a missing driver for a Bluetooth device trying to communicate via a virtual serial port. Acer Community What is the SPP Driver? Serial Port Profile (SPP) Why Correct Drivers Matter for Shipping If you've
Yes. The CH341-based driver works on Windows 11 (22H2 and 23H2). You must disable Memory Integrity (Core Isolation) temporarily during installation if you get a "Driver cannot load" error.
If the automatic installer doesn't clear the error, follow these steps to manually link the driver: