Are you sure there aren't two serial ports for this BT connection, one to
receive (read)- also called 'outgoing', and another to send (write) - also
called 'incomming'?

In this case, you'd need two separate instances of the serial port object,
one to send and the other to receive.

Note, I haven't used your printer, so I'm speculating (often BT devices
assign a single SPP port), and if this isn't the case, I don't have another
suggestion.

Dick

--
Richard Grier, MVP
Hard & Software
Author of Visual Basic Programmer's Guide to Serial Communications, Fourth
Edition,
ISBN 1-890422-28-2 (391 pages, includes CD-ROM). July 2004, Revised March
2006.
See www.hardandsoftware.net for details and contact information.

Hello,

normally you can send and receive over the same Bluetooth SPP
connection. This distinction sending or receiving SPP port (dev A/dev B)
is only relevant for the initiation of the communication. Later it's
unrelevant. I assume the communication is started by the CE device and
not the printer.

Greetings

Markus