Computer Hardware Article serial loopback test software

DIY
Easy to test serial port By Loop back method.

This Article is Copyright© 2006 Author : Wongsak N. ; distribute please credit to us.

This article will help you to test your computer port (Serial port) by yourself. If some hardware that use serial port connected to your computer does not function properly, comport test is the First step that you should do as this method is Very Easy to Test it.

How to test serial port RS232 Connection step-by-step?
This is call a loop back test method. NO NEED Any Software Install on your Computer!!!.NO NEED any Hardware Interface on your Computer.

What is "Loop back test Method”?
"Loop Back tests can be performed by connecting the transmitter on the device to the receiver on the same device"

Why we should to do this method?
When the interface hardware device have some problem occors or hardware function not properly.You can't test your Hardware because you don't sure computer port working properly.This method is Easy way to Troubleshooting by yourself.

How to

This method will send and receive data in same port call ‘LOOP BACK TEST’.

We use HyperTerminal Software to Send and receive data (Standard software in Window XP Version).

Hardware Requirement (Nothing)
Software Requirement (HyperTerminal)
Skill Requirement (Nothing)

- Step one - Prepare

Find something connect (Short or Link) your target com port (DB9 Pin) somebody call Serial Port Pin 2-3. Shutdown your Computer Use it short Pin 2-3 (Pin 2-3 only - Be careful short other Pin Use a bunch, or Paper clip).

Shutdown your Computer Use it short Pin 2-3 (Pin 2-3 only - Be careful short other Pin)

Pin 2-3 Short

Pin 2-3 Short

- Step Two - Prepare

Start up the computer and Run Hyper Terminal program - Start up the computer and Run Hyper Terminal Software Note : Start Menu > Program > Accessoires > Communication > Hyper Terminal Program) If you don’t see HyperTermnal Program got to Microsoft download and download it.

Enter Connection name

- Step Three - Configuration

Configuration Hyper Terminal Connection Setting - Configuration Hyper Terminal Connection Setting Enter Connection name (may be use “test my com port) Select target com port to test (com1,com2,com…n) Properties Connection Below Band rate 9600 Data bits 8 Parity None Stop 1 Flow Control None then Click “Restore to Defaults”.

Select Comport to Test

Select “None” or Click “Restore Defaults” and Click “OK”

- Step Four – Test
Press any Key... On Keyboard

If you see any character on Hyper Terminal – comport was normally. -

Perform a loopback test Press any Key… On Keyboard - Send data out to com port If you see any character on the screen Hyper Terminal - comport was normally.

If you don’t see any character on Hyperminal Screen. Shutdown the computer and Check your Comport Pin 2-3 must connect it.(Don’t short other pin).and test this method again.

If you don't see any character on Hyperminal Screen. Shutdown the computer and Check your Comport Pin 2-3 must connect it.(Don't short other pin).and test this method again.

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