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  1. #1
    How to find the COM port number on macbook

    Member Since
    Nov 20, 2012
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    100
    How to find the COM port number on macbook
    Hi,

    I am using a usb to serial(rs232) converter so to connect to a small controller.

    Due to programming reasons I need to find the com port number so to be able to connect to the device. Once I connect the converter on windows I just go to devices and printers and find the com number there.

    But I cannot find it on my macbookpro runnning mountain lion 10.8.4.

    Can someone please help?

  2. #2
    How to find the COM port number on macbook
    mrplow's Avatar
    Member Since
    Oct 01, 2007
    Location
    UK
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    6,759
    Specs:
    27" iMac i7 (2011) 10.10, iPhone6, iPad Air 2, AppleTV2
    Apple Menu (top-left_ - About this Mac etc. Not in front of my Mac at the moment but all the hardware info, com ports, interrupts etc are all there
    External hard disk acquisition addict - but admitting the problem is the first step to a robust backup

    Please use the reputation system if you think you've been helped - top right of this post

  3. #3
    How to find the COM port number on macbook

    Member Since
    Nov 20, 2012
    Posts
    100
    Hi mrplow

    thanks for your reply.

    Yes I found the usb to serial converter but not recognizing the COM port number.

    On windows I find Prolific USB-to-Serial Comm Port (COM4) for example. but on the mac cannot find it. I found a location ID but there is not written the Comm port number as in windows. Do I need to include this location ID number instead of the Comm Port in the Matlab code to be able to connect?

  4. #4
    How to find the COM port number on macbook
    mrplow's Avatar
    Member Since
    Oct 01, 2007
    Location
    UK
    Posts
    6,759
    Specs:
    27" iMac i7 (2011) 10.10, iPhone6, iPad Air 2, AppleTV2
    Did the device come with any drivers/software?
    External hard disk acquisition addict - but admitting the problem is the first step to a robust backup

    Please use the reputation system if you think you've been helped - top right of this post

  5. #5
    How to find the COM port number on macbook

    Member Since
    Nov 20, 2012
    Posts
    100
    Yes it has a driver software for both mac and windows.

  6. #6
    How to find the COM port number on macbook

    Member Since
    Nov 20, 2012
    Posts
    100
    Hi,

    Are there any suggestions for my problem pls.

    Thanks in advance for your help

  7. #7
    How to find the COM port number on macbook
    mrplow's Avatar
    Member Since
    Oct 01, 2007
    Location
    UK
    Posts
    6,759
    Specs:
    27" iMac i7 (2011) 10.10, iPhone6, iPad Air 2, AppleTV2
    I've looked all over but it really depends on the adapter. What make and model is it?
    External hard disk acquisition addict - but admitting the problem is the first step to a robust backup

    Please use the reputation system if you think you've been helped - top right of this post

  8. #8
    How to find the COM port number on macbook

    Member Since
    Nov 20, 2012
    Posts
    100
    Hi mrplow sorry for the delayed reply but I was not at home.

    It is similar to this model in fact from the same website
    USB to Serial Converter (CDLSB-901) product ranges from NEWLink

    Thanks again for your help

  9. #9
    How to find the COM port number on macbook
    mrplow's Avatar
    Member Since
    Oct 01, 2007
    Location
    UK
    Posts
    6,759
    Specs:
    27" iMac i7 (2011) 10.10, iPhone6, iPad Air 2, AppleTV2
    Have a look here. Some useful info. But, I'm afraid, no comm port numbers. OSX and Unix just don't enumerate serial ports like that from what I can understand.

    There is info on that page that gives you the device name. You may be able to use that in your code
    External hard disk acquisition addict - but admitting the problem is the first step to a robust backup

    Please use the reputation system if you think you've been helped - top right of this post

  10. #10
    How to find the COM port number on macbook

    Member Since
    Nov 20, 2012
    Posts
    100
    Ill try it. Will contact you back later this week becuase I think that this link if helpful.

    Thanks again.

  11. #11
    How to find the COM port number on macbook

    Member Since
    Nov 20, 2012
    Posts
    100
    Hi mrplow,

    Sorry for replying this late but I was a bit busy with other stuff.

    The link you posted helped me a lot in fact OS X does not have COM port numbers I used "/dev/tty.usbserial" in my code in MATLAB and worked fine.

    Thanks for your help :-)

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