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Finding Available COM ports in a PC.

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Hi, I would like to write a program which can find the available serial ports in a PC and connect to the port to which an external instrument is connected. the instrhwinfo('serial') provides me the available serial ports(one of the port is connected to an instrument) in my PC.
Now i replug the instrument to different serial port and do an instrhwinfo('serial'). This time it doesn't update the change in port name. Why is this happening? Is there a script/additional commands which can recognize the port name when i replug again and again to different ports on my PC.
Need assistance, Thank you.

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Accepted Answer

Walter Roberson
Walter Roberson on 25 Mar 2011
Postings from Mathworks staff in the past have indicated that you need to restart Matlab to get the port list updated. I do not know if that is still the case in the latest versions.

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More Answers (2)

KarthiK Krishna Kumar
KarthiK Krishna Kumar on 25 Mar 2011
Hi Walter,
Thanks for your reply. Yes as you indicated i need to restart matlab in order to update the port list. Is there any other way to update the list from a script ??
Thank you !!!

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Walter Roberson
Walter Roberson on 25 Mar 2011
It appears that the answer is NO for real serial ports, and "not implemented" for USB ports. Please see http://www.mathworks.com/matlabcentral/newsreader/view_thread/300827

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Phillip
Phillip on 19 Dec 2012
I had the same question, just found that the answer is the "instrreset" command.

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