Hi,
I am writing software in Visual Basic 6 for control of parallel port with SMS.
Currently I 'm using Samsung SGH-E330n as GSM modem. It is conected on USB port over the serial cable (usb to serial adapter).
I tried to communicate with the gsm modem in Hyper Terminal, and it works fine. I can send the message and it's responsing on AT commands.
But, I have one problem...
When I receive SMS on SGH-E330, the communication blocks. After that it doesn't response to AT commands, until I unplug and then plug usb cable again.
here is how I am trying to receive SMS:
AT+CMGF=1 (text mode is on)
AT+CNMI=1,1,0,0,0 (Modem will now have to response when a SMS is received, it should send to computer: +CMTI: "SM",1 but, nothing... )
when SMS arrives, communication blocks.
If you have any idea, please let me know.
Thank you very much!
