Is there a serial utility I can use to send some bytes over RS232 COM1 from my PC?

I need to send about 90 bytes to my Embedded target board from PC serial COM1 Port.
I just need some PC based serial utility that will send exactly bytes I specify.  It needs to send data exactly as I specify.

I am running Wndows XP on my PC.  
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What about 'HyperTerminal' which ships with XP? Apart from that one, you could also use the 'MTTTY' executable  from ("Serial Communications in Win32"). Direct link:

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if you ONLY need to send 90 bytes i guess there is no poossble utility but if you want to send data what you can do this install an modem from windows itself and simply test/query this modem it will send data to COM1 automatically
naseeamAuthor Commented:
>>   What about 'HyperTerminal' which ships with XP?
Do I get to hyperterminal from command prompt?  Exactly how to invoke hyperterminal.  Can I set hex data with hyperterminal or am I restricted to ASCII?
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You might have to add it to your XP installation from the setup CD, I am not sure if it is installed by default. And, strictly speaking, there's ne difference between ASCII and hexadecimal. BTW, if you have trouble finding or installing HyperTerminal, there are (apart from the free one in the article I linked above) server free others out there, too, e.g.
I've used hyperterminal over COM1 by typing in ASCII commands to another computer and receiving ASCII data back. I haven't used it programmatically. Is this what you wish to do - to be able to have a program send/receive binary data to an external device, rather than typing in data from the keyboard?
I didn't realize that hyperterminal had a programmatic interface - good to know.
Did you try addressing "COM1:" file like:
echo my-special-bytes > COM1:

or even:
copy my-file-with-bytes COM1:

I'd start from that.
naseeamAuthor Commented:
Thanks for so many great responses.  Following is non ASCII data that I need to send from my PC to my target emebedded board.  Data need to be sent from COM1 seriial port.


My target embedded board must receive the exact data above.

Please walk me through one of programs above to transmit above data.

Thank you!

Just some more references to have in your toolbox..

"SerialPort Class"

And, on the slight chance that you get a bug:
    "Top 5 SerialPort Tips"

"Windows Serial Port Programming" article:

If you do not get a response to your request to "walk me through one of programs above to transmit above data", then hit the "Request Attention" link and ask for assistance from an Expert who works with COM1 ports.
The "Windows Serial Port Programming" article has a step by step of the sample code. Hopefully, this will provide you with enough to get started. Although I haven't done RS232 on Windows, the code in this article looks like it may provide you with what you need.
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Windows XP

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