I am using Windows 10, an Arduino Uno and COM port is COM3. When uploading the Blink sketch the error message " can't open device "\.\COM1" " pops up. I don't understand why Arduino says cam't open COM1. The Tools menu and the Device Manager both say the Arduino Uno is connected to COM3. This proble…

Windows 10 can't open device "\\.\COM1"

SenBySen December 25, 2016, 5:51pm 13

great help for us to get started. Christmas present works now.

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