Communication with BlueTooth Device over Serial Port

Hi

I have recently purchased a BlueTooth device from SparkFun, and have managed to get it to work using Hyperterminal.

I would like to use my own VC++ written program instead of Hyperterminal.
I have managed to read/ write RS232 serial data before, and the BlueTooth device communciates serially.

Right now I have managed to:
(a) Using Hyperterminal send commands to start up the BT device.
Commands such as "ATUCL<cr>", etc
(b) Once the connection is established- I close Hyperterminal and start up my own VC++ program.
(c) I can then send over the RS232 line a "start command" (not requiring a <cr> and a "stop command" (Also not requiering a <cr>)
I can receive data over the RS232 line and display it.
(d) What I CANNOT do is to send "ATUCL<cr>" type of commands over the RS232. It just does nothing.

Can someone please tell me how to send a

ATUCL<cr>

into the RS232 serial port?

(I have tried, using \n \r and both \n\r with no success).

Thank you in advance.
a.

have a look on this may be this one Help you
http://www.codeguru.com/forum/showth...09#post1377409

Thankyou

Have you tried "\r\n" instead of "\n\r" ?

Hi

Yes I have tried both combinations of "\r\n" and "\n\r"

What is the exact characters for:
AT<cr>

is it "AT\n\r"?

and is \n\r 2 characters or one?

Thank you
a.

You can refer to ASCII Chart in MSDN library for RS-232 communication.

If you send character '\x00D', it is equilvalent to <CR>.

\x mean Hexadecimal and 00D is the ASCII number equivalent to <CR>.

Hi zawthet

Thank you- that worked!

All the best
a.