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Problem with AT read sms from gsm modem

P: 1
I have a GSM modem, Wavecom.
When I connect to it using HyperTerminal, i can read SMS with the standard AT comands, like this:

AT+CMGR=1 + enter


When I use VisualBasic, the SAME AT sequence does not work.
And I get an ... NO RESPONS.

The manual says to do the following:

MSComm.Output = "AT+CMGR=1" & chr(13


MsComm.input --- always null no character in mscomm.iput

What is wrong?

Many thanks for any help.
Nov 26 '07 #1
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1 Reply


Expert 5K+
P: 8,434
I'm no expert in this area, but I do remember from years ago that you have to send "+++" or something, followed by a one second pause, to switch to command mode. Perhaps that's the problem?
Nov 26 '07 #2

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