Hi allI don't know if this list is still active but I am in urgent need of help
with unit synaser. I am trying to develop an application that exchanges AT
commands with an external GSM modem through a COM port. So far I have been
using the demo application that came with the SYNASER.ZIP file to test the
operation of the code. The problem I am facing is that the AT commands I send
down the COM port do not seem to reach the modem. I know my COM port config is
correct (baud=>19200, data bits=8,parity =N, stopbits=0(i.e. 1 bit),flow
control=None). I also know that the modem functions properly because it works
perfectly with other ready-made software in the above config. Also, when using
Synaser I have noticed the following: a) the code works great with my built-in,
standard dial-up modem but NOT with the external GSM one, b) the code appears
to connect correctly to the port where the GSM modem is connected because when
I run TBlockSerial.Connect & TBlockSerial.Config I can then check from other
applications that the particular COM port is in use, c) if I then try to send
an AT command (e.g. AT or ATI) it times out and returns error 9997 ErrTimeout
"Timeout during operation". d) If I dig in a bit deeper into
procedureTBlockSerial.ATcommand which is the one that times out, I find that
Function Sendstring(value + #$0d) in line 1945 does not execute properly (I can
check so on the modem using other software). I suspect that the command does
not reach the modem at all and as result the modem does not send back a
response, which is why the code times out shortly afterwards. Presumably if the
the command DID reach the modem but was, say, in the wrong format, the modem
would return ERROR and the code wouldn't time out. Now Sendstring simply calls
SendBuffer, so I tend to think that there is something wrong with SendBuffer
but I am not familiar with the code in that function to start fiddling.Please
helpthanks
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