AT Commands using TCP/IP Connection with GPRS Modem

[lenin_7]

Hello, I'm trying to communicate with a GPRS Modem by using AT Commands, I tried this manually by sending commands through Telnet and Hercules Software so modem is responding correctly.

I want to do the same using a Labview VI, so when I'm runnning the VI it seems that commands are send correctly but I dont get any answer from the modem. I  don´t know if I'm using \n\r characters ok.

I would appreciate any help

[rolfk · Accepted solution]

When you press the enter key in a terminal program it sends normally the carriage return and line feed character. You have to do the same in your LabVIEW strings by adding those characters to the end of a command string.
Enable backslash code in the right click menu of your string control or constant and add \r\n to the end of your command string.

[lenin_7]

Rolfk Thank you very much for your answer, I attached \r \n commands to string and it finally worked.

I update VI for further information.

I'm using modem GP2 V2  from Witech.