From my pda application i want to print to a bluetooth printer! My questions are:
1)How to print ?using the virtual serial com or the socket functions? which is better?
2)if i use the socket can i use the XOn,XOff handshake to control the buffer of the printer?
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I check the sample from sdk it seems ok but and know how to control the buffer of the printer because when the buffer of the printer is full its stop printing. Can i control it by XOn XOff?Is it necessary if i use socket communication? if not then i must use serial comm in both of port incoming and outgoing.Is this right?
When I send all the string to printer via socket, the printer does not print it all because the buffer if full and stops printing.
If I send it in parts of 256 bytes with some Sleep like 800 then printing is ok.
What can I do with socket flow control ? I try to use the socket function 'select' to look fo data tor read and sometimes the printer send the character (-1). What is that character?
PLEASE HELP ME
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by: alexey_gusevPosted on 2009-05-29 at 11:49:11ID: 24505088
it depends on what services BT printer supports, theoretically you can use both methods.
with sockets, you can't use Xon/Xoff unless you use RFComm over BT (ie it'll be serial comms).
if you develop in cf.net languages, perhaps have a look at InTheHand library (versions before 3.0 are free)