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Problem :

I am currently working with arduino nano and facing following error 
avrdude: ser_open(): can't open device "\\.\com1": the system cannot find the file specified.
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1 Answer

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Solution :

This is how I solved the problem i faced in recent past. You will find the Arduino COM port in device manager as shown below:

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Now you need to go to the Advance properties of the port

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Please set your COM port number to COM1

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Then replug the USB.

After all above steps your issue will be resolved.

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