Hyperterminal To Test Serial Port

Hyperterminal is a communications program that isincluded free with Windows 95 and later. Although the program has somequirks, it's handy for sending data to serial displays. This tip sheetshows how to configure the program, and lists some known peculiarities.

Hyperterminal's publisher, Hilgraeve, offersfree and low-cost upgrades to the program, as well as more advancedcommunication software. It's very likely that most or all of the issueslisted here will be solved by downloading a new release from their site.

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Hyperterminal Test Serial Port

  1. How to use HyperTerminal as a Serial Port Monitor Connect the system you are monitoring to the serial port. Open the HyperTerminal Software and create a new connection. Enter a name for your connection and click OK. Select your COM port under 'connect using'. Click Configure, and make sure that.
  2. Make sure that there is no application that is using the serial port. For testing you can use Putty and set the port settings to 2400-8-None-1-XOn/XOff. Once you are on the Putty screen press 'Shift+Y', this should return an SM on the screen.
  3. This is the loopback test. You can make a loopback plug by taking a nine pin female connector (socket) and soldering a wire between pins 2 and 3. This is then inserted into the connector of the serial port to be tested. Or, alternatively, you can take a bit of wire and wrap it around pins 2 and 3 of the relevant serial port as shown in the figure.
  4. How to use HyperTerminal as a Serial Port Monitor Connect the system you are monitoring to the serial port. Open the HyperTerminal Software and create a new connection. Enter a name for your connection and click OK. Select your COM port under 'connect using'. Click Configure, and make sure that.
  5. Hyperterminal for serial communication (rs232 or rs485), download When I used Windows XP, I loved to use Hyperterminal because it is pretty simple and easy to use for serial communication. Especially it is pretty good for RS232 or RS485 communication. But now Windows does not support Hyperterminal any more.
NOTE: If you just want to demo ourserial displays, try our free Windows serial-sender utility. Download the program here.

When I use Hyperterminal to test COM1, I get the message 'Unable to open COM1. Please check your port settings.' I've checked the BIOS of a working station and compare it to the non-working station. All information matches correctly. When I check COM1 property resources, the problem station looks identical to the good station, and not conflicts. Signal (RxD) in a single serial port connector to make it seem like there are two ports connected together. Making a loopback Step Procedure Description Step 1 Turn off the computer. Step 2 Connect RxD (pin 2) and TxD (pin 3) of the serial port. Use a loop-back connector if available, or any kind of conductive wire, even a paper clip.

Setting up Hyperterminal

In a normal installation of Windows 95 or later,Hyperterminal is automatically installed under Programs:Accessories, soyou access it as follows:

  • Click Start
    • Select Programs
      • Select Accessories
        • Select Hyperterminal folder
          • Select Hypertrm.exe

Upon launching Hyperterminal, you'll be given theopportunity to name and assign an icon to your settings. You may chooseany name/icon. Afterwards, a series of dialog boxes will appear. Enterthe following settings:

Phone Number

  • Click the drop-down arrow by Connect Using
  • Select Direct to COM1 (or 'directto' the port you intend to use)
  • Click OK

Hyper Terminal Test Com Port

COM1 Properties, Port Settings

  • Bits per Second: select 9600(or desired baud rate)
  • Data Bits: select 8
  • Parity: select None
  • Stop Bits: select 1
  • Flow Control: select none
  • Click OK

Advanced

  • Select Defaults
  • Click OK
  • Click OK

This will get you into the main Hyperterminal window.There are still a few more settings to make. Pull down the Filemenu and select Properties.

Properties Dialog

  • Click Settings tab
  • Check Terminal Keys
  • Set Emulation to AutoDetect
  • Click ASCII Setup button
    • Under ASCII Sending, check Echotyped characters locally
    • Under ASCII Receiving, check Appendline feeds to incoming line ends
  • Click OK
  • Click OK

Using Hyperterminal

Hyperterminal To Test Serial Port Communication

Once you've configured the program, make sure to saveyour configuration for reuse. If you launch the program using yourconfiguration icon, your settings will be loaded automatically.

How To Test Serial Port

With the settings listed above, anything you type intothe Hyperterminal window will be sent out the serial port. You can alsosend most control characters by holding down the Ctrlkey and typing the appropriate letter. For example, control-L(formfeed) is recognized by our BPP-, BGX-, VFD-, and SGX-seriesdisplays as a clear-screen instruction. Hold Ctrland type L to clear the LCD screen.

You can also use an old DOS trick to send particularASCII values that may not have control-key equivalents. Hold down the Altkey and type the decimal ASCII value on the keyboard's numerickeypad (not the number keys along the top of the keyboard),then release Alt. Precede the number with a 0(zero). For example, to send ASCII 133, press and hold Alt, type 01 3 3 on the keypad, then release Alt.

Don't leave out the 0 (zero) preceding the number! Ifyou do, the actual value sent can be changed in odd ways. For example,ASCII 14 sent as Alt-down 1 4 Alt-upworks fine, but ASCII 15 sent as Alt-down 1 5Alt-up gets translated to ASCII 164.

Hyperterminal Commands

The smart customer who pointed out the necessity of theleading zero speculates that it has to do with Windows' conversion ofcharacter codes to the DOS character set.

Corrupted Config Files

Saved configurations can be corrupted in odd ways. Themost obvious symptom is that typing the same character three times in arow causes the third instance of the character to be sent incorrectly.In other cases, the terminal program fails to work altogether. The onlyfix we know of is to create a new configuration from scratch, asdescribed above.