Com Port not showing up in LabVIEW

[jamiem638]

When I used PuTTY, I was able to output numbers like in the serial monitor of the arduino IDE. 

[billko]

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@jamiem638 wrote:

When I used PuTTY, I was able to output numbers like in the serial monitor of the arduino IDE. 

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Thanks a lot.  Now I'm even more stumped.  😄

[tom.pascente@gmail.com]

I also have a similar problem with a com port that was working yesterday, but today its not showing up in NI Max. It is on my device manager, and I can Tera Term into it and communicate with it normally.  Any suggestions on what to do next?  Simple PC restart didn't help. 

[Martin_Henz]

Detecting the available serial ports is tricky. NI-VISA uses a different approach than my serial port library. Both (NI-VISA and lvserial) are not detecting all serial ports, but I feel that the enumation of the registry works slightly better than NI-VISA.

Anyway, opening and using a serial port is a totally diffent thing. Have you tried to open the serial port (the COM4 ?). If there is no explicit check against "found serial ports" in NI-VISA, this should work without hassle.