Once shorted, the top row of the DB- 9 cable should look like this. This connects the Transfer line coming out of the computer to the Receive line going in.
Use the following procedure if you are using Lab. Windows/CVI procedures are linked at the end of the page. VIEW procedure is listed below, and both the Hyper. Step 1 is the description for shorting the pins and is the first step to all three.
All perform a loopback test on the serial port by shorting out the Transfer and Receive pins on the cable connected to that port. There are three ways to verify the operation of the serial port: Lab. Loopback Test to Verify Hardware Operation. Serial Communication Starting Point - National Instruments. In this video tutorial, I give an overview of what the Arduino hardware is and how the LabVIEW Interface for Arduino (LIFA) works.
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