VS Arduino - Can no longer upload code to Nano

May 23^rd, 2025 at 9:34pm (UTC)

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VS Arduino › › › Can no longer upload code to Nano

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Can no longer upload code to Nano (Read 1329 times)

peetj Junior Member Offline Posts: 14 Location: Sydney Joined: Apr 10^th, 2023	Can no longer upload code to Nano Sep 25^th, 2023 at 3:37am	Print Post
	Hi, Everything was going swimmingly well (almost everything) until I got this message which I have seen 1000 time before on the Arduino and usually solve it within 30 seconds: avrdude: ser_open(): can't open device "\\.\COM8": Access is denied. Usually reload the app, unplug/replug...etc and all good. Not this time however. I checked on the Arduino IDE and I could upload code no problem. The issue persists on VS with Visual Micro. Not sure where to go from here. Clearly something is locked up (a file?). Have restarted Visual Studio - same issue. I did try switching to an UNO from the Nano and successfully uploaded on a different COM port. Switched back and same problem. Many thanks Pete...

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peetj Junior Member Offline Posts: 14 Location: Sydney Joined: Apr 10^th, 2023	Re: Can no longer upload code to Nano Reply #1 - Sep 25^th, 2023 at 3:45am	Print Post
	Ok my mistake - I had a Serial Monitor window open on an arduino app.


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