Com Port not showing up in LabVIEW

[jamiem638]

When I plug in the Uno R3, I am able to see the port in the device manager, but I can't find it in NI MAX or in LabVIEW. I know I was able to view the port in LabVIEW before, but now it's not showing up. I tried repairing NI-VISA and it didn't solve my problem. I am using COM4. Any help is appreciated.

[RTSLVU]

Do you still have the Adruino IDE running and minimized in the background?

Because if any other program opened the serial port and has not released it, Windows has that resource locked and NI-MAX will not find it.

[jamiem638]

The arduino IDE and other programs that open the serial port are not running in the background.

[santo_13]

Maybe a quick computer restart to ensure all applications release the Serial ports reserved by them

[jamiem638]

Unfortunately that did not work either. 

[billko]

I'm stumped.

[jamiem638]

Could it be a driver issue on the board side of things? I am using an Elegoo Uno R3 and I know it works on LabVIEW because I was able to get it to work a while back ago, but I can't get it to work now. 

[billko]

I am inclined to think the same as you; if it shows up in device Manager, it should show up in NI-MAX.  Can you use PuTTY (or similar) terminal emulator to communicate with whatever is on the other side of the COM port?

[jamiem638]

I am not familiar with PuTTY. I will try that and see if I can communicate with it. 

[santo_13]

LabVIEW gets the list of serial ports from Windows, it is possible that some USB-Serial chipsets like CH340 have bricked up over time.