Access denied serial port

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I have developed and executed serial port communication in C#, dot net.

My code is working fine with all serial ports in the lap, Unless I connect dongle (TATA PHOTON) and disconnect it. Then if I execute my serial port code I am receiving exception as "Access denied" Kindly advise on this. Dongle is disconnected properly. Thanks in advance.

Posted 5-Jul-15 19:25pm

Member 11815444

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OriginalGriff · Answer 1 · 2015-07-05T20:04:00

Solution 1

Check your code: the chances are it hasn't noticed the disconnect, and has left the SerialPort instance open. If you do that, trying to connect a new one will fail because the port is in use.

Make sure that when it disconnects, you close and dispose any existing instances.

Posted 5-Jul-15 20:04pm

OriginalGriff

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Member 11815444 6-Jul-15 2:11am

I am using both close as well as dispose.. and also checking the condition if connection is open ..closing it and then opening it again..then also same exception..Plz advise