Loopback Test to Verify Hardware Operation There are three ways to verify the operation of the serial port:, HyperTerminal, and. All perform a loopback test on the serial port by shorting out the Transfer and Receive pins on the cable connected to that port. Step 1 is the description for shorting the pins and is the first step to all three.

Encounters From Africa Short Stories Pdf. The procedure is listed below, and both the HyperTerminal and procedures are linked at the end of the page. Use the following procedure if you are using. • Connect a cable to your serial port. The most common port is a 9-pin or 25-pin (DB-9 or DB-25) RS-232 port. On the cable, short lines 2 and 3. This connects the Transfer line coming out of the computer to the Receive line going in. Once shorted, the top row of the DB-9 cable should look like this: [1 2=3 4 5].

A lot of Engineering projects and tutorials for the students to help them in their final year projects and semester projects Serial communication arduino labview. Arduino Control Relay - Tutorial #5. In this quick Arduino tutorial I will explain how you can control a relay using the Arduino Board, one 1.

An easy way to short pins 2 and 3 is to use a paper clip. If you have a female RS-232 cable, bend the paper clip and stick the ends in the second and third hole.

If you have a male cable, bend the paper clip in a way that you shorten the long loop to the same length as the short loop. Then you can clamp it on the two pins. On an RS-485 port, voltages are referenced differentially.

Therefore, short TXD+ and RXD+ together and then TXD- and RXD- together (pin 4 to 8 and pin 5 to 9 on a DB-9 cable; pin 1 to 5 and pin 2 to 4 on a Combicon connector). Make sure your software is configured in four-wire mode. • For HyperTerminal or LabWindows/CVI, follow the links at the end of the page. • For, follow the link 'Loopback Test for Serial Port.' This takes you to the Loopback VI in the Example Program Database, which is a part of the Technical Support page. You need to unzip the file. This VI is written in LabVIEW 4.0.1 and will write a string of words out of the serial port and then read them back in.

Before running the VI, make sure to set the port channel correctly. In LabVIEW, zero represents the first serial port. [PC: 0 = COM1, 1 = COM2. Mac: 0 = Modem, 1 = Printer. Sun: 0 = ttya, 1 = ttyb.] • If this works correctly and the string of words is read back in, the serial port hardware works. Most serial port communication problems are in the program and concern timing of read/writes calls or configuration of the serial port.