Thread: Send a hex string to a serial port

  1. #1
    Registered User
    Join Date
    Oct 2022

    Send a hex string to a serial port


    I have to send that string:

    F5 01 00 02 00 C0 01 37 01 01

    to COM1 port (9600, ID: 1, Data bits: 8, data number: 1, timeouc 1.5 sec., no flux control, no parity).

    But my question is: there is a C serial library can help me to write that program?

  2. #2
    Registered User
    Join Date
    Sep 2022
    What operating system are you talking about?

  3. #3
    and the hat of int overfl Salem's Avatar
    Join Date
    Aug 2001
    The edge of the known universe
    Which OS and compiler are you using?

    I'd guess Windows, since you mentioned COM1

    CreateFileA function (fileapi.h) - Win32 apps | Microsoft Learn
    Scroll a long way down to "Communications Resources"

    See also
    Communications Resources - Win32 apps | Microsoft Learn

    windows - How to use Win32 API to talk to a com port (RS232) - Stack Overflow
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