Sending New Line character after command

[BiggyD]

I have a text box where I enter the command   *IDN?\n   (includes termination character) and send it to my equipment...nothing happens. I then send *IDN?<ENTER><ENTER> (hit ENTER key twice) and I get the response I wanted. And it only works if I hit the ENTER key twice. What's up with that? Thanks.

[Hooovahh]

Is it possible your device doesn't respond to the *IDN? request but instead responds to an empty request?  By that I mean what if you sent ABCD<ENTER><ENTER>, does the device respond with what you want?  *IDN? is somewhat common but not not all devices respond properly to it.

[aputman · Accepted solution]

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@BiggyD wrote:

I have a text box where I enter the command   *IDN?\n   (includes termination character) and send it to my equipment...nothing happens. I then send *IDN?<ENTER><ENTER> (hit ENTER key twice) and I get the response I wanted. And it only works if I hit the ENTER key twice. What's up with that? Thanks.

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Also make sure that you have special characters turned on when typing the \n.  Otherwise it is interpreted as \\n.  Right click the control to change the display mode.

[BiggyD]

The *IDN?  command is a request for the device's identification. The command works fine if I send

*IDN?|<ENTER><ENTER>   I get back the identification string I expected. Otherwise, if the command fails, I get a blank... nothing.

[BiggyD]

YES! That's the problem. It was driving me crazy. I right clicked on the text box and chose  '\' Codes Display   and now it works as advertised. Thanks.