Using MSComm component to communicate via bluetooth

Question

Hi,

I am developing a program to receive data from a device via bluetooth. 

I set my bluetooth dongle to a com port and can easily read data from it. The article here (http://support.microsoft.com/default.aspx/kb/194922) was very useful.

But, I have a problem. When the bluetooth connection is lost (eg. when the device is shut down or when the device leaves its bt range), the program can not understand it.

In debug mode; I've realised that the events (comEvCTS, comEvDSR, comEvCd and comEvRing) on MCComm1_OnComm() runs in turn one by one when I switch off the device.

Do you think should I use this situation to control if the connection is lost?

Answer 1

Hi fkucuk,

Go to http://www.devx.com/assets/sourcecode/5255.zip and when the dialog box comes up hit "Save" and save it to your hard drive.

http://www.devx.com/wireless/Article/11511/0/page/3


http://forums.devbuzz.com/m_36766/printable.htm

BeST Wishes
Xingwei Hu

---

Please remember to mark the replies as answers if they help and unmark them if they provide no help.
Welcome to the All-In-One Code Framework! If you have any feedback, please tell us.

Answer 2

Dear Xingwei Hu,

Thanks for your reply,

I have examinde the links you gave, but the device I connect is a linux driven basic barkod reader and I have no problem connecting to and receiving data from it.

My mayor problem is how can I understand when the bluetooth connection is lost. 

Is there any event that I should trace which states the connection is alive. Or is there a kind of signal that I can send and receive which I can interpret that the connection is still alive (like pinging) which does not affect the device's operation. 

I have to use vb 6.0 and my manoeuvres are limited.

Thanks..

Answer 3

Hi

This forum is for VB.NET questions only (e.g. Visual Basic 2003, Visual Basic 2005, Visual Basic 2008).

 

Sticky: For Visual Basic 6 questions, please read...

Sticky: For VBA, Office (VSTO), Macros and VBScript Questions

For VBA (Visual Basic for Applications), Macros or Excel Questions, you will get better support in the VBA Forum:

http://social.msdn.microsoft.com/forums/en-US/isvvba/threads/


Best Wishes
Xingwei Hu

---

Please remember to mark the replies as answers if they help and unmark them if they provide no help.
Welcome to the All-In-One Code Framework! If you have any feedback, please tell us.