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cannot open usb device permission denied

Posted: Tue Apr 02, 2024 5:48 pm
by wms20
I am using an atmega328pb with minicore installed. My friend can upload to the atmega fine so I know its not a board issue. He used the same usb cord and programmer so those are not the issue either. avr dude shows it can find the port but just does not haver permission. Any help would be appreciated.
Screenshot 2024-04-02 174744.jpg
Screenshot 2024-04-02 174744.jpg (183.66 KiB) Viewed 574 times

Re: cannot open usb device permission denied

Posted: Wed Apr 10, 2024 10:59 pm
by aidanferry
I am having the exact same issue. ATMega328PB, usbtiny programmer, MiniCore, same error output. I wonder, did you ever figure this out?

Re: cannot open usb device permission denied

Posted: Thu Apr 11, 2024 12:59 pm
by adafruit_support_carter
Check for 3rd party software that might be taking control of the COM port and preventing its usage in Arduino.