Problem with Serial Monitor on Arduino R4 Minima

Official Hardware UNO Family UNO R4 Minima
1

Hi all,

I know this has been asked before, but I have tried a number of things which have been suggested in other posts in the forum.

I am having difficulty in getting the serial monitor to communicate with the Arduino IDE. I am using Version 2.21 and Windows 10.

The Arduino is detected in Device Manager :-

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But every time I try and open the serial monitor, I just get a message saying that it cannot open the port - Port Monitor Error: Command Open Failed.

When it is trying to open the port, it gives the message

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I have tried different cables, but this didn't make much difference.

I have also tried connecting a Nano to the same computer, but I get a similar message, but I couldn't install the drivers (this pc is limited by IT so I cannot install drivers or software)

I have managed to install Arduino V1 on a stand alone XP machine and the Nano worked. But I couldn't find the divers for the Uno R4.

I have also tried pressing the reset button twice and uploading the blink program which made zero difference.

I can upload to the Uno R4, but it wont communicate

So any suggestions?

Is the board faulty - the R4 Minima?

2

Just an update to this.

I have tried a brand new Uno R3 board, but when I try to connect to the Serial Monitor, I get a similar message -

"Port Monitor Error: Command 'open' failed: The Filename, directory name, or volume label syntax is incorrect"

The drivers in Device Manager for the Uno R3 are installed ok.

When I try and upload code to the R3, I get the message-

avrdude: ser_open(): can't open device "\.\COM5": The filename, directory name, or volume label syntax is incorrect.

Failed uploading: uploading error: exit status 1

I have tried a different cable and it is the same.

I have set the board in the IDE to Arduino Uno and Comm. Port 5.

I also tried using the Uno R3 on a Windows XP machine. The drivers install ok, and I can connect to the Serial Monitor ok. The IDE version on XP I am using is 1.8.18.

Any ideas please?

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