Sending sms from a windows service using SVCOM

[OlaSamuelson]

Hello!
I have made a thread which is self contained and runs perfectly if created from a form.

The thread runs fine, receives messages, starts, stops etc but it can not send sms
if i run it from within my windows service.
Exactly the same code, same machine fails on TBFGSMModemClient.sendsms when started from within the windows service.

It just stops on the first send. Nothing else happens, no exceptions, nothing.

Swithcing back to my gui app works instantly so ports/settings must be ok.

I am on D5Ent/5.2

Any ideas? Permissions??
Thanks!

[Mike Petrichenko]

Good day!

Will check and try to find work around.

[OlaSamuelson]

Ahhh...its a miracle. Turning off FIFO buffers for COM port makes the service work.
Doesn't affect the GUI app though.
Weird...


Sorry to bother you. It was not obvious though.

Thank you, have a nice week end.
//Ola

[Mike Petrichenko]

Good day!

Thanks for report. It is interesting why it affects only for service app

Have a good weekend too.

[OlaSamuelson]

Hello again!
I am afraid i spoke to soon....
Totally intermittent...
Any ideas?
Thanks

[Mike Petrichenko]

Have you tryed WCL instead BTF?

[OlaSamuelson]

Nope, haven't got it as i only have BTF.

[Mike Petrichenko]

Try the demo and if it will work for you then I open access to registered.

[svenj]

Hi,

I'm working with Ola, and this issue is on my desk now.
I've tried the demo app and another test app that I have done.
My test app uses the exact thread that the service does and it works every time.
But when I run it from the service it stops at sendsms as before.
I've also tried switching FIFO buffers on and off but still the same.

// Sven

[Mike Petrichenko]

Hm, very strange, i'll try to find the solution.

[svenj]

Hi,

I've done some research...
In the function TBFGSMModemClient.InternalMakeSMS it stops at the line:
PDU := ComposePDU(AServiceCenter, APhone, Tmp, AFlash, Long, ANeedReport, Cnt, Ndx, Ref, SCANumLength);

Hope that may help you.

// Sven

[svenj]

Hi again,

You can stop searching for the problem.
It was my fault.
Some how when we send sms from the service code the text is missing.
When I corrected that the function sendsms is working again.

Sorry to trouble you with this.

// Sven

[Mike Petrichenko]

Good day!

Great that you have found the problem